Metal Spray REPAIR Caterpillar Engine Crank Pulley | Thermal Spray Welding

The seal surface of this crank pulley is badly worn and we’re going to repair it with metal spray! This crank pulley is off a Caterpillar 3306 Engine from a CAT 637G Scraper tractor and the seal surface has a deep groove worn into it that needs repair. We show the step by step process of metal spray welding using our Castolin Eutectic Rototec setup. First we prep the part by machining down the worn surface and apply the masking compound. Then we use our metal spray gun to pre heat the part before spray welding on the new material. Once the part has cooled we machine it down before finishing it to spec using emery cloth.
In this video we are using:
Hafco TM-1740G Centre Lathe
Castolin Eutectic Rototec spray gun
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[@CuttingEdgeEngineering]

Hey everyone we hope you enjoyed seeing this metal spray repair 🔥 let us know what you thought of it in the comments and have a great weekend 😎👍 Subscribe and hit the bell icon to turn on notifications so you don't miss our weekly uploads. 👇 🤳 📲Follow us online here: linktr.ee/CEEAUS 🛍Official CEE Merch shop: www.ceeshop.com.au 🎉Get Early Access & Ad Free videos in our Patreon community: www.patreon.com/cuttingedgeengineering

[@ypaulbrown]

Hello My Friends in Queensland.... .I would love to see a real short segment on cameras, lighting if any, and edit software you use Karen.... .I really admire your technique.... .you are a natural at make very informative video that is understandable.. now if you can only get George and the Train to cooperate., and maybe help Kurtis from getting his tongue wrapped around his eyetooth so he can see what he is saying.....the outakes are always fun to watch... .I know when I am on camera, it sounds if I just drank Tea Martunnies or a Bubble Durban......... .thanks so much.... .best wishes from the other 'Sunshine State' Paulie Brown

[@Murphyslawfarm]

Metal spraying never gets old 👍

[@viixy364]

Well i'm in the UK so just waking up to Friday, You guys in Oz are from the future :D

[@mattgraham1983]

😂bloody dirty mits all over the nice clean paperwork 😂

[@64Pete]

Have a great weekend !

[@patmullen9978]

The rock I live under never told me there was such a thing as metal spray repair. Fascinating!

[@bobuncle8704]

Apparently we were sharing the same rock😏

[@2barrell]

Kurt, your skill set continues to amaze me. From master machinist to welder to bird whisperer.

[@michaelkoch2109]

I can only agree with that! - Best regards from Dresden to all of you! 👍🍀❤🛠🇩🇪❤🇦🇺😎

[@brianfeddersen8124]

Think bird whisperer is a tad much? Just knows how to be cool and that bird feels safe no doubt :). Wonder if George has met Homey yet.

[@CatNolara]

@@michaelkoch2109 Spray welding is such a cool process, always fun to watch. - Best regards from Dresden as well :D

[@AxlMetcalf]

With a K? I thought it was Curtis

[@dirtfarmer7472]

@@AxlMetcalf Yes, Kurtis

[@austenmoore9782]

Being a farmer, with a lathe, it's so good to see things repaired instead of being tossed. Good job.

[@SlartiMarvinbartfast]

There's far too much waste these days and the big corporations increasingly want to tie us into their greedy mindset where things are thrown away in order to create more sales.

[@boppins]

Then you must love this channel! Seems like he's constantly repairing farm equipment.

[@MikeBaxterABC]

I grew up on a small farm ... I remember repairing items on the farm, because it was not worth the TIME going to town to find a new part (even if it was free, t was still cheaper to fix what you have! :) )

[@batterybuilding]

Setting the economics aside, fixing something is just way more satisfying.

[@MikeBaxterABC]

@@batterybuilding 100% true, even if it takes longer .. and often the repaired / rebuilt item is better than original .. eliminating future repairs!

[@BDKennels]

I really appreciate the respect you have for old tools, their manuals and advertising Kurtis. You are quite literally preserving a small part of history. Well done.

[@sparty94]

homey is living his best life. i love the clips of him tearing open his care packages.

[@hoilst265]

You have NO IDEA how happy I am you showed the paperwork from the Rototec. That Mid-Century, industrial graphic design and typography is absolutely my jam - those sans-serif Humanist typefaces, the clean lines. Elaflex, who make ZVA fuel nozzles, still do catalogues like this. They are glorious.

[@CuttingEdgeEngineering]

Karen loved seeing the old paperwork, and in the condition it was she is thinking of scanning it and maybe framing the originals 😂

[@BrickNewton]

​@@CuttingEdgeEngineeringYou could frame and sell them as merch.

[@hoilst265]

@@CuttingEdgeEngineering DO IT! They were made before the days of desktop publishing and inkjets, so you got *one* typeface to use, and maybe two colours at most to use...otherwise the offsets printing costs started to really eat your budget. It's a classic case of form following function. The use of sans-serif, humanist or Gothic typefaces, I believe, everyone trying ape the Germans and Swiss, and their reputation for precision and quality workmanship. Futura - the old Wes Anderson typeface - got a huge run in the 60s, and of course the ubiquitous Helvetica is still everywhere, but there was Gill Sans for some British stuff. The Germans now use FF DIN (the "DIN" stands for what you'd expect), because the Germans demanded an even *more* clinical, cold, precise typeface for their industrial gear.

[@praetorxian]

Abomb79 would be proud..

[@blockbertus]

@@CuttingEdgeEngineering I 100% agree with Karen! Scan it in and keep the originals safe. The whole kit appears to be in glorious condition.

[@gazzafloss]

CEE has definitely repaired it better than a bought one, well done Kurtis. Thanks for another epic episode.

[@CuttingEdgeEngineering]

thanks mate appreciate it!

[@jiggsborah7041]

The 3306 has been there since forever. I'm 60 years old and did my apprenticeship between 82 and 87 and that engine had already been in production for years. It's a very widely used engine and I've encountered it in agricultural machinery, drilling equipment and it's widely used underground in LHDs etc. It's such a good engine that they are still being used decades after they came out and I'm happy to see that you are involved in keeping them alive ❤❤❤

[@CuttingEdgeEngineering]

Hey mate what a great comment, thanks for sharing your knowledge!

[@jiggsborah7041]

@@CuttingEdgeEngineering..pleasure mate. I spent most of my working life in an environment like yours and I'm very very impressed with your level of skill. It's rare to find someone who is skilled in so many difficult trades because people usually concentrate on just one. I look forward to your posts. I live in a small gold mining town near Johannesburg in South Africa. 👍👍👍😁😁😁

[@warrenjones744]

In the US anyway it was popular in vocational type truck such concrete mixer trucks as well. They are everywhere.Very solid engine and my favorite to rebuild.

[@marksmallman4572]

I am 65, and in my early twenties I worked as a plant technician in Africa, almost all of the heavey plant where Caterpillar, I now work on boats in the Med, and still come across Cat engines, great motors.

[@TheMrMavman]

Before ceramics where readily available & more cost effective like they are today. We used this very same process. I remember our unit being pretty much identical to the rig you used in this vid. We used it for coating exhaust systems, cast inlet manifolds & other automotive parts. We used it as a means of both rust prevention & asterisks. I was aware it could be used for these kinds of projects as well but never got the opportunity to try it out. It was interesting to watch & the finish was excellent. With the hardness achieved I don’t see that balancer ever having that problem again in its lifetime. Thanks for giving me the opportunity to see this. It was a blast from the past & an education all in one. It’s also really fantastic to see that some of those old methods still being used today. It’s a skill that would otherwise be left in the memories of old buggers like me. Lol

[@lancereagan3046]

I love seeing parts like this being rehabilitated, instead of being thrown away. Would like to see more of this type of parts renewal.

[@rrad6601]

Eutectic metallurgy is really quite magical. Essentially the powder and the steel form an alloy right where they meet, and the melting point of that alloy is much lower than either metal alone, so it's a cold process (as opposed to welding, where you must melt each metal separately). The warm powder and warm steel form an alloy on contact, forming a strong tough bond. Magic!

[@jamesbarrett5226]

Rich, just out of pure curiosity/ ignorance. Would it be possible to spray weld a layer on knife steel? As hard as that finished product seemed, I would think it would take and hold, a ridiculously sharp edge.

[@kjdude8765]

​@@jamesbarrett5226Yes, you can put an edge on a knife. However the tensile strength of the material is very low (compared to the parent steel) that it will chip away easily. In this use case the powder sprayed layer is only under compression.

[@al1sa920]

@@jamesbarrett5226 This Old Tony has a video about using tool steel rods with TIG torch exactly for welding a cutting edge

[@tfoutfou21000]

​@@al1sa920watching the top machinist on YT. A man of taste

[@charlesangell_bulmtl]

@@tfoutfou21000 ​& @al1sa920 Aw, Tony does stuff like that for grins and giggles...🤨😉

[@devnull73]

It's amazing that rototec stuff hasnt changed much in so long. Great company with a solid product that *works*.

[@jbillo488]

Hi Simon, I saw that done during my apprenticeship about 55years ago. Worked well back then but, the metals (powders) are probably better today

[@graemewhite5029]

We had the same kit back in the 70's when I was serving my time. I thought it was real space age stuff, but we had a few guys at work who had previously been working for De Havilland and Rolls Royce on the Blue Streak rocket project, until the government pulled the plug on it, so maybe one of those guys recommended it ? They brought a lot of good ideas with them, but not the budget they'd been used to ! They had some interesting tales of time in French Guyana and Woomera SA doing test launches, all powered by kerosene and liquid oxygen !

[@stacycullum3597]

If it ain't broke....

[@andrewpowellnz]

Very much a throwback for me I remember seeing parts repaired the same way, for the powered scrapers 50+ years ago at my Dads Ministry of Works Repair depot in NZ. Thanks Kurtis & Karen

[@CuttingEdgeEngineering]

Hey mate that's awesome, always good to know if our viewers can relate to the jobs we are doing. Hi to your dad, you 2 take care

[@tech8823]

I am from Sri Lanka. In the mold manufacturing company called Multi Mold, where I work, including me, all of us in our mechanical work unit watch these valuable videos of yours almost every day. I have studied full-time courses in machining and welding at the German Technical Tranning School.I intend to visit Australia before the end of this year. I will definitely visit you when I arrive.

[@raderallen1]

I'm a machinist for a large CAT dealer here in the US and we flame spray almost every single part that comes in for repair. It's cool seeing someone with a large viewership doing the same thing. I would like to point out some things I do differently you can try out for next time. There is no real advantage to putting a thread into the under cut area. I've found that just running a fast feed rate like ~0.015"/rev while undercutting provides a very consistent but still textured surface for uniform adhesion of the spray. With a part like that with a 4" OD I'd run at around 150rpm with 0.006" feed rate when turning back to size with ceramic insert, it sounds slow but that spray is almost like sandpaper and turning too fast will literally melt your carbide cutter, like what happened to you. A seal area like that probably has a +-0.002" tolerance from CAT so I turn it to the top end of spec and then lightly polish with 240 grit paper. Going with a finer grit just exposes graininess in the spray.

[@g7majoh125]

It’s unfortunate that he probably didn’t see this comment

[@basketofdeplorables4253]

he didn't even get the engine right, it's from a C9, and a repair sleeve with green retaining compound would be better than new for this part.

[@raderallen1]

@basketofdeplorables4253 an OD steel sleeve would work here, but flame spray has a higher abrasion resistance than typical mild steel and probably is a better fix in this application.

[@basketofdeplorables4253]

@@raderallen1 repair sleeves are not made from mild steel. they are made from material much better than the cast iron the pulley is originally made from. it would be a permanent repair, or worst case have to be replaced when the engine is overhauled again.

[@raderallen1]

@basketofdeplorables4253 most steel sleeves used to repair CAT components are from mild steel, rhe exact material is dependent on recommendations in the cat literature but unless it's a very specific use case it's not going to be wear or abrasion resistant. In fact, we actually use more cast iron sleeves to repair wear components than we do steel.

[@giovanniyorke7455]

I hope engineering universities in Australia are using your video as guides for their students because I always learn alot. Fantastic video!

[@clivesymons853]

I started my apprenticeship in 1970, and I still remember the rep coming to demonstrate this powder spraying unit. Naturally, it was purchased. It's great to see it again in action. 😊

[@stevepiechock9234]

This was probably just another day at the office for you, but for me it was riveting! I appreciate your narrative. I felt that I understood everything you were doing as you did it. I always check your videos as I receive them. This one was one I am very glad to have viewed. Also your wife Karen did an excellent job in the videography! Thanks again.

[@CuttingEdgeEngineering]

Hey Steve, what a great comment and feedback to read, good to know the videos and commentary were enjoyed. Cheers!

[@lewisavinash1]

@@CuttingEdgeEngineering i have never heard or seen this way before and yes i agree 100% with Steve

[@robsin2810]

My Dad was a engineer toolmaker, he taught me to be so proud of your work, to stamp your mark on the work you do. He always did that. 👍🙏🇦🇺

[@charlesangell_bulmtl]

We were required to stamp our production weldment....Calavar/Condor/Time mfg. #40

[@Hardy_H_H]

i once stamped my name on a front crank seal. To this day it's still leaking lol... shouldn't have stamped it so hard

[@RJMachine62]

I've fixed many of these on the Cat 3300's 3400's 3500's with a simple speedie sleeve and never had an issue, but it was only where the seal worn a grove in there, not totally eaten up like that one! I've turn a few others down and press on a sleeve when speedie sleeves weren't available or if a key way didn't made the wall to thin. I do love the spray welding tho and it probably makes it better than new.

[@michaelaotearoa3839]

Great when you can leave the job in the lathe for the entire process. Enjoyed this one guys.

[@taban9582]

Greetings from Ukraine. I have been watching you for more than 3 years. Your channel is one of the best for working with metal. Thanks for the interesting and educational videos)

[@CuttingEdgeEngineering]

hey mate you must've been with us since the beginning thanks for sticking with us for so long!

[@mattbergseid9196]

Hope you're well and safe, the Ukrainians have my admiration...

[@ThatPNWGuy2024]

It’s 12:20am and now I’m going to be up until 12:45. Worth it. Cheers from WA state USA, thanks for all the great content!

[@geraldstahlman7036]

I'm 65 and I wish I were your apprentice. Man you have my respect.

[@beckster181]

I first saw this reclaiming type proceedure when i was in the Army back in the late 1970's when we were having issues with the drive sprockets for the APCs wearing out quickly and there was no replacements in the system. Someone had the idea to try this Eutchtectgic spray system to rebuild the teeth on the sprockets and our unit was selected to try it out. The result was a quick repair to the sprocket and by placing one rebuilt pair of sprokets and a pair of brand new sprockets on the same vehicle so you had a rebuilt and a new one on each track it was shown that while the new one wore out at the usual rate the rebuilt ones with the exact same conditions of use had none to minimal wear in the same time frame. So after that all drive sprokets were reclaimed at about 1/4 the cost of new ones and lasted for about 5 to 10 times as long as new ones. This also cut down on track wear due to bad sprockets. Which the APC crews loved as it ment lots less track bashing.

[@anxietyislandllc]

I can't stop from saying it but Karen's video work is exemplary! We're never left wanting for a close-up to see things better or other angles for the bigger picture. Your videos drop on a late Thursday night here in the Seattle area and I'm always on high alert for them! Bravo!!! 🎥😁🤙

[@CuttingEdgeEngineering]

Wow, thank you!

[@genesound]

@@CuttingEdgeEngineering Yes, outstanding producer and editor, from an old broadcast guy. I've watched many hours, and it's always high quality, informative, and entertaining.

[@peter-pg5yc]

I agree top notch..

[@fredfred4086]

I agree. Kurtis is one of the best on KZbin. There are also other very knowledgeable and skilled tradesmen/craftsmen/artists/experts on KZbin. Very few have videos as well presented, AND ALSO in such a logical, step by step, easy to follow sequence. The quality of the video, lighting, and instructional 'story telling' style, add immensely to the value of these videos. Well done Karen (and Kurtis)! 👍🙂

[@Darkrif1957]

Job well done ,Great camera work Karen. Thanks!

[@CuttingEdgeEngineering]

holy shit mate what a ridiculously generous super thanks you've blown us away again. You might like to consider our patreon community where you can get the benefits of Ad-free, early access and bonus content for your contributions! 😅 Thanks so much for your support we appreciate it very much. Cheers, Kurtis Karen & Homey🐾

[@Darkrif1957]

Hey Kirt how do i find your patrion link@@CuttingEdgeEngineering

[@Warped65er]

@@Darkrif1957 link is in the description

[@Tgiles13]

And now im convinced that CCE is just a way for Curtis to buy all the toys he like playing with.. the rototec gun with all the bits and paperwork is awesome!

[@CuttingEdgeEngineering]

shit someone's on to me 😅

[@Boomer848848]

Have to admit, I was wondering why the choice was made to repair rather than replace, but that last 30 seconds (at 22:40) of video cleared it right up!

[@lincbiggins4342]

Hey guys, I am a mechanic and a lover of all things mechanical and engineering, I am also an avid dog guy with a little crossbreed staffie/boxer, she is a similar age to Homie, I can see you both treasure him and he you and like my girl he is spoilt rotten, you are so fortunate to be able to have him with you 24/7 as I was able to up until 12 months ago when I changed jobs and now she is a stay at home doggo ( saddest every morning when I go) Keep up the fantastic content it is a credit to all of you as a team.

[@spb81]

amazing that a 50 year old tool is in such mint condition, and does a perfect job. The videography of the process was brilliant!

[@CuttingEdgeEngineering]

Glad you enjoyed it

[@kenore4003]

As opposed to more modern tools that spray applicator doesn't have any extra, unneeded parts. Just a torch and gravity feed. Need to shut off the feed then just lift the nose up. No fancy valves to gum up or break

[@zennor_man]

I know nothing of engineering or machining, have never set in a proper workshop. I know nothing of video production or photography but I do know that your channel is unmissable & amazing ….thanks guys!

[@CuttingEdgeEngineering]

thank you for the support! We hope you keep enjoying the videos 😁

[@Icebuntrucker]

I did work at Eutectic Limited (uk) in the 1980s Had no idea what they did , Now in 2023 im watching a guy in Australia use one of there machines . What a world we live in .

[@CuttingEdgeEngineering]

that's awesome

[@phillipyacovella2010]

Now, I used to work for Westinghouse in a large apparatus shop. I have used this system in the past.Didn't like it, but it worked for small parts, as shown. But nothing beat the old wire feed with powdered metal in it, It was great I used it up to 1977 It was a huge gun and set up on a large cart, spraying bronze and nickel. We had ours next to a big gap lathe. for big shafts or housings. It needed a big exhaust hood, large fume. Now plasma spray is the way if possible and viable. I have used it also. Nice vid, thanks.

[@brianlchase]

Thanks for adding custom closed captions [nom] [nom]. I sometimes run these on mute at work lol. The automatic CC sucks for those that depend upon them like the hearing impaired.

[@CuttingEdgeEngineering]

Thank you for noticing and giving feedback about that!! 🥰

[@marcelizzi]

Guys, you're amazing! I'm a mechanical and civil engineer in Brazil and don't know any professional like you here. The quality, attention to the details, professionalism, knowledge you present is outstanding! Congratulations guys! I can't go to work at Friday before watch your video. Thank you very much for this excellent content!

[@joseorion5323]

Deixa de complexo de vira-latas rapaz, VOCE DIZER QUE NÃO CONHECE NÃO SIGNIFICA QUE NÃO EXISTEM MUITOS BRASILEIROS TAO TALENTOSOS COMO ESTE, ELE REALMENTE E BOM NO QUE FAZ, MAS VOCE INSINUAR QUE NO BRASIL NAO TEM PROFISSIONAL TAO QUALIFICADO É MUITO COMPLEXO DE INFERIORIDADE!

[@wirefeed3419]

@@joseorion5323 Relax and get over yourself and get off your all Caps rant, it makes you look uneducated and childish. The guy stated He doesn’t know anyone with the professional and gives a 💩 skills similar to Kurtis. I live in a country a hell of a lot bigger than Brazil and I also don’t know of anyone that has similar overall knowledge, ability and gives a damn like Kurtis. That does not mean or say they don’t exist, of course there are others just as skilled and more skilled. What it does say is they are few and far between and that the trades world wide need to smarten the hell up and do better. I am 4 decades in mechanical trades and over all I have seen all trades have gone to 💩, with laziness, drinking, drug use, lack of training and an I don’t give an F pay me attitude. It is very rare to find committed , good attitude, safe skilled Qualified workers.

[@greenrocket23]

​@@joseorion5323"ain complexo de vira-lata meo!" Cai na real muleque, é quase impossível encontrar um profissional qualificado nesse nível no bostil. Vai ser um ufanista tapado assim na tua casa. Also, this is an english language video. It would be more polite of you if you could type your comment in a language the majority of the other users watching this video can understand.

[@Tiefsee8]

Jap,so ist es 😂

[@williambailey9378]

Never seen this done before! Incredible how this method has not changed over time still an acceptable solution to the problem 😮

[@benharris9175]

A great repair, I have always used sleeves in the field, but spray for overhaul repairs. 3306 and 3308's have certainly stood the test of time. Great to see a repair I used to request actually being carried out. I used to send it out and it came back fixed, now I know what it takes.

[@matthewmurray4159]

I actually weld the radiators that go in a lot of CAT products. Ive been welding for years and never heard of this method which is awesome to see. I'd love to spend a year in a shop learning things like this

[@asw19B100]

Without reading through all the comments where this observation has almost certainly already been expressed, I would like to compliment the receiving department for his careful handling of critical materials, and most of all, his enthusiasm and pride of workmanship.

[@everestyeti]

Really cool that you've kept all the paperwork, must admit it's something I do as well. I think it's really good that you can use something that is 50 year old technology, not only is it a testimony to those that designed the equipment but to you for keeping it alive. 👍

[@brianpatten]

You two have some fantastic content. Throwing in some old-school repair techniques with the usual precision, getting in touch with nature, appreciating a double rainbow, making sure your pupper gets good exercise too! Keep up the great work!

[@scottbaeder37]

HOMEY "over the rainbow" AWESOME

[@thepagan5432]

Does not matter how often I see this done it still fascinates me. To be able to produce an homogeneous layer of metal simply by spraying with heated particles of metal is amazing. The hardness of the sprayed layer was impressive and has given the end user an effective repair. Great post, a huge thank you to Kurtis and Karen for posting 👍

[@Az88-]

I love the fact you explain what you are repairing and how it works to begin with 👏🏼

[@Jack-sf5yp]

42-Jack from Maryland USA ... These olden days, my Friday afternoon adventure is awaiting for and watching your great work (shop and video content, just fantastic). A perfect old school technique and customer care; speaks for itself. I haven't seen metal spray so expertly done in far too many years; very well done!! And ... such a pristine kit so well preserved ... speaks for itself of a Master who cares for his customers, work and gear. Great lesson for all, especially our younger trade folks in this throw-away culture! Thank you for all you do! Jack

[@gyrogearloose1345]

I love to see you getting the jobs done right. No stress, no mess. Poppadah poppadum. Thanks Kurtis and Co!

[@kevinklingner7712]

Curtis thank you for your time in making these informative clips.they are instructional and entertaining.

[@CuttingEdgeEngineering]

hey mate so glad you enjoyed it!

[@Sparkey]

Amazing , you've got to hand it to the pioneers of these processes.

[@larrykephart8784]

Curtis got to hang with several guys from Australia over the weekend. I must say I had a blast with these guys. But I found out it's hard to out drink them lol. keep up the good work mate.

[@warusweims]

I went through some seal training with SKF a few years ago. One of my take-aways from the training was that seal surfaces, for best results should be plunge ground so that lines created from tooling or grinding do not pump oil. As the surface gets bathed in oil the rotation of the part can pump oil. Love the content Kurtis and Karen!

[@ronadrian5539]

These videos are soooo good...really interesting. Who else thinks Kurtis looks like an absolute bad ass when he lights up a torch? Looks like he was made for this and definitely proves over and over that he is in an exceptional way.

[@tomtd]

I presume you sprayed this rather than doing your usual bush repair method of adding weld / machine because it’s cast iron (?)

[@RickRolling-tc7vb]

Blown away by the videography, again! That underexposed shot of the powder meeting the flame was right up there with the best moments of "Holy shit that's beautiful" and "Oh, now I can see how it works" combined. There was another series like that on a welding job about a month ago, better than Spielberg. Jolly well done Karen, and props to you too Curtis for smashing it out in style.

[@philmayf]

I'll say it again, spray welding is magic

[@GeoHvl]

I am not even close to being in the field of work, the first time I ran across this channel was at least four years back. Curtis was using this torch, metal blasting thing and I have been watching every Friday since.

[@Tom-cs3zf]

I was a machinist at an aircraft manufacturer. I didn't have any weld experience except for what I saw taking place at times. One time I needed to have an aluminum engine component welded but the welder told me he wouldn't be able to weld it until it was degreased. I took it the department that had a degreasing vat - it was a heated pit that had a chemical degreaser in a vapor state. The aluminum part would heat up - i suppose to a couple of hundred degrees- while the vapor remove the old oil from the metal pores. At least this is the way I understood the method to be. Nice and clean afterwards- the welder and I were happy. Just a memory that came to mind.

[@25vrd48]

The metal spray repair is so cool . I'd never seen it until you used it on a job a good while back . Talk about hard stuff , well it sure does look like it . Another great video y'all . Keep them coming , good night from central ARKANSAS , USA

[@charlesdowdie121]

i really love when yall show video clips of homeless opening packages. please show many many more in the future videos. yall are both great fpr recording thes many different projects and showing us the many things that are in the shop. keep up the great work. from the U.S.A

[@waynecarr98]

Awesome to see you do something you haven't shown on the channel before. I am not a metal worker or even anything related but love the content. it makes me want to go play Milling Machine Simulator after every video. Also got to love Karen's gasp when the torch was lit, it shows such a genuine feel.

[@teeanahera8949]

Except Kurtis has shown it on the channel before. 1 year ago, flame spraying cast iron. kzbin.info/www/bejne/sJjZapp3jdimna8

[@dirtfarmer7472]

@@teeanahera8949 That’s what I thought, I’d seen it before.

[@waynecarr98]

I remember that one now. It didn't click as it was a different torch and not a rotating repair. Same theory but different application and process.@@teeanahera8949

[@jaywheeler8181]

Great Job All, Kurtis, Karen and Homey!!! I Have been in Quality control for over 3 decades and this content is so satisfying when Kurtis disassembles and repairs the shafts that he works with and makes things back to manufactures specs in a short turn around time is so awesome to see!!!! Great job again. Thanks for the content

[@muchopomposo.6394]

Terrific stuff, you lot..! 🎉 As someone who isn't from an engineering background, I love this channel. I learn something new just about every week. I didn't know you could even spray metal onto metal. Bravo! 👏🏻

[@mrdunns3338]

Another ex-Merch Engineer here (retired these past 10 years after 40+ at sea) and I've worked on many different engines. The most problematic were some Deutz used as gen-sets, uprated from 50Hz to 60Hz and the extra speed created some strange vibrations which used to shear fuel lines occasionally, but also crankshaft vibes. This used to do exactly the same to the crank as your pulley repair. The company (Europe based) I worked for supplied Speedisleeves which are a very thin titanium sleeve pressed onto the crank without the need to strip it out of the engine. They were available in sizes from around 30mm to 300mm in 0.1mm increments.They were very successful, is it something you've heard of or used, Kurtis? They're still available from a variety of sources here in the UK, so a proven technology.

[@mrgumbook]

From what I can tell from the companies website this seems more like a product for 'in the field' type repairs where the purpose is getting the machine up and running quickly. But that doesn't stop the problem of abrasive dust getting in and wearing out the part again. Half the jobs we see Kurtis doing are because the customer had to get the machine up and running ASAP and the other half is not servicing on a schedule because it costs money every hour the machine isn't doing work. For marine operation this makes a lot more sense when you could go days without help and you need that engine up and running ASAP because something else is going to go wrong with the second engine while you're 1000 miles from help.

[@mrdunns3338]

Yep, we did use them as a "get you home" measure when the machine needed to be up and running again asap, however they were still running very well after a couple of years and no leaks. The cost of crank repairs or replacement at drydock periods far outweighed the in field sleeving which was quick, easy and very effective. It was only the Deutz engines I described above that had this problem, due to the speed being cranked up to run 60Hz alternators and the problem only came to light after a few years.

[@AaronCole-j4s]

I love how you constantly manage to teach me new things and ways to work with metal.

[@bobferranti5222]

Homie is your pot of gold for sure! I worked in a oil refinery back in the 70s-80s and they used to metal spray in the machine shop. Your method is much nicer.

[@wayne6512]

I do exactly the same thing as Kurtis does, and I've also done an extremely lot of powder welding onto many different base metals. If you can master the art, powder spraying is really a game changer for many repair jobs.

[@jamesmorgan6782]

My favorite! Your skill set is almost always perfection. Years of experience at work here.

[@shawn081082]

What's so amazing to me is that you can see, with the naked eye, the difference between where the masking compound was applied and where the material actually bonded when you are turning this. Love watching you go to work bud! Always learning something new from you!

[@OldTooly]

I had that exact kit in 1975 at the Milbanks Manufacturing Co. in Kansas City, Missouri. We had progressive dies that we fed scaled bar stock into and the scale was brutal on all the guiding and cutting edges and surfaces. We built the surfaces up and then ground them in. Keeping the close fitting die blocks from warping or growing irregular in these complex dies was tricky. But they lasted a lot longer in production. I met my wife at that job because she kept breaking dies and I had to go out in the plant to fix them. I cooked our first lunch date, it was in the middle of the night since we were on second shift, in the heat treat oven. We have been together ever since.

[@donatellonabotti2299]

About 3 weeks ago the algorithm suggested I watch CEE and I'm hooked ever since. I watch 2 to 3 of the videos every day and some of them 2X in a row. One of my favorite things to see is the inserts making ribbons out of the workpiece in both normal speed and slow mo. It's like a visual version of ASMR. It would probably start a trend if Miz Karen made shorts videos of that stuff. Keep up the great work!

[@mikepetersen2927]

Really nice shot at 10:20! Well done to you both -- not everything needs to be a three-part dozer blade rebuild, and the attention you give to the smaller jobs (both in front of & behind the camera) is great to see. Thanks!

[@JFirn86Q]

That kit with all the papers and manuals is so COOL. Gotta keep that together and clean, and better yet, scan it online :) Beautiful repair as well, surprising how hard that is.

[@Banerled]

*_Wow, I just wanted to say a big thank you for the amazing KZbin video! Seeing the process of repairing the worn seal surface on that crank pulley was truly fascinating. Dealing with a Caterpillar 3306 Engine from a CAT 637G Scraper tractor and the worn groove on the seal surface must have been quite a challenge. Your detailed step-by-step guide to metal spray welding using the Castolin Eutectic Rototec setup was incredibly informative. Starting with the prep work like machining down the worn area and applying the masking compound, followed by the metal spray gun pre-heating - it's obvious you know your stuff. And then, watching the part cool down and machining it again to specifications using emery cloth was a great way to show your dedication to precision. Thanks for sharing your expertise and the whole repair process with us. Looking forward to more engaging content on your channel!_*

[@CuttingEdgeEngineering]

Hey mate thanks for taking time to watch and leave such a positive comment we appreciate that support. Cheers!

[@bachaddict]

@@CuttingEdgeEngineering I suspect it's an ai generated comment 😂

[@Banerled]

@@bachaddict *_Don't just suspect, be sure. In my case, AI assisted me in translating it into English._*

[@samrijijkot]

@@Banerled I'm curious, from what language? What was your mode of input?

[@dustyroads834]

I thought this technique was more modern. I had no idea you could do this 50 years ago. Learn something new every day.

[@hhanger1]

I learn new things every day. As a teenager, I worked in an oilfield equipment shop and the machine shop was right next to our assembly area. I remember just how cool it was to watch those guys churn out parts.

[@garytelling397]

Nice to see the old rototec still in use, I did a lot of these types of repairs back in the 90's, as you said follow the parameters and it's a very solid repair. 👍

[@campbellmorrison8540]

Im amazed that molten dust sticks considering how (not) hot the base substrate is. Very interesting as always 👍

[@brianfeddersen8124]

I think Kurtis explained that at the start. Was always kinda confused as other yters who do such work wouldnt be clear in what was going on like he was today.

[@physicsguybrian]

The base does get quite hot. It's not as if the flame is not applying heat during the process.

[@campbellmorrison8540]

@@physicsguybrian True but its not red or near melting, I suspect the differential is still quite large.

[@physicsguybrian]

@@campbellmorrison8540 Fair point. I imagine there must be tests done that measured the differential. It would be cool to know that! Cheers!!!

[@robertrawlings]

Wow Kurtis that took me back a few years, I've used the same tools and like you always had good results, glad to see its still being used ,Great content mate :)

[@CuttingEdgeEngineering]

hey mate glad you could relate to this! Thanks for always watching

[@ivorscruton5121]

Used Castolin Eutectic spray on in the past to build up a seal surfaces, an overlooked alternative to sleve technique, Good to see it still being utilised in this parts replacement society we currently find ourselves in.

[@jibguy2003]

Your camera operator is very good. As a movie camera operator here in the States, I’m very impressed with her ability to “ride the iris”, and framing. You RocK Girl!

[@VW.907]

....ahh a genuine channel...no politics just ( from the outside looking in) good people doing cool shit......

[@DaveWithMS]

This is an awesome idea for a repair... definitely saves the customer a whole lot of money! I love the bloopers and such at the end!

[@andrewkoetz3933]

The blooper reels (B Roll footage) is priceless; especially with Homeless, George, Jeffrey, Russell and other birds

[@victorjimenez1907]

Well a sleepless night and new video, what a good combination. Greetings from Mexico

[@CuttingEdgeEngineering]

Hey mate thanks for taking time to watch

[@samuelmorrison6006]

I never knew that something like this could be done. Congratulations Kurtis for such a good job.

[@JDSly1]

I have worked with spray welding (a.k.a. "metallizing") for 30 years now here in the states. We get a lot of Caterpillar parts at the shop, especially in the warm months. We use Metco equipment, which is mostly wire-feed. We do mostly repairs, but fairly often also new parts because the coating can be more corrosion and wear resistant than the base metal.

[@JT-si6bl]

Opens the chuck, and suicidal tendencies begin to coerce with Murphy... until the cradle of relief is occupied. Absolutely wild skills and applications of metal work. Never take for granted what is easily taken for granted.

[@andrewsherman400]

A true craftsman at work combined with cinematic quality video, thanks for all your hard work Kurtis and Karen!

[@Chef42]

Found this really interesting. I would really like it if you could do a video on inserts at some point. Explaining what the different types are, what they are made from, how fast they wear and such.

[@CuttingEdgeEngineering]

hey mate thanks for the suggestion we'll put that on the ideas list!

[@jackreed3445]

More great video work from Karen and a very interesting process to fix the part. I'm sure the customer liked the turn around time compared to trying find a replacement part. I imagine the fact that you take so much care in your work keeps them coming back to your shop. Waiting to see what you have for us net week. jack, Valley of The Sun Arizona, USA

[@danielpullum1907]

I discovered tonight I had deleted your site from my list. Not sure how that happened. I have a Victor spray torch system that I have had for several years. I used it quite a lot to put a hard layer on the bottom of lawn mower blades that created a "self sharpening" system for the blades. It worked great. I did a few build up with on motor shafts, etc. You guys will always be at the top of my list.

[@johnplump3760]

I have watched many of your videos. You seem to be able to tackle most any job. Watching you spray weld just confirms what I am saying.

[@dennispremoli7950]

Shoutout for showing the paper work. Goes a long way in preservation of this sort of equipment, when official manuals are either hundreds of dollars to repurchase, or lost forever.

[@billmoran3219]

Have the same setup that was brand new in the box , I bought it at an old machineshop going out of business estate sale. Still haven’t had the opportunity to use it yet , but I’m a bit of a tool whore so it’s always nice to know I have it in my tool crib waiting for a project. Thanks you three again for the quality content.👍🤙✌️

[@tinman7551]

It’s like a 1950’s sci-fi ray gun. Very very cool 😎.

[@CuttingEdgeEngineering]

it's definitely a fun piece of kit!

[@tinman7551]

It’s just as lethal as well 🤣 @@CuttingEdgeEngineering

[@ryanlukens9280]

At 12:35, proof there is a pot of gold at the end of the rainbow. Just depends on what you value. Love the video Kurtis, spray welding and dog jerky, good stuff.

[@WhatTheTarnation.]

Love the content. Thank you for not editing the gasp of surprise from the camera person, when you light the torch..I like the one take approach! Keeping it real.

[@ronaldhope8939]

Amazing content. I have only heard of this type of material being used in machine repair but have never seen it done. Thanks for showing this type of operation. Outstanding workmanship and as always fantastic camera work.

[@CuttingEdgeEngineering]

Thanks for watching!

[@Resonantfate]

Abom79 has also done some work with it. He goes into quite a bit more detail if you're interested in the nuts and bolts.

[@notabandicoot5227]

Never actually have seen this been applied. Bloody fascinating. Beautiful work

[@swampy1584]

What a cool process I had no idea you could spray metal like that❤

[@MV-qm9ne]

Carbide too.

[@jesstreloar7706]

Recycling old machinery, using tech that others have forgotten, and doing a good job at it. Excellent

[@brian_2040]

Hey Kurtis and Karen! The 3306 was in the 12h I ran for 7+ years. Didn't do anything but change oil and filters. Love that motor.

[@wigf173]

I do love the infographics showing us all exactly where the part sits. You guys need a little Kurtis or Karen to take on the family legacy! You're both exceptional and amazing at what you do, you really do have a legacy to look after ❤

[@arffadailey8055]

Never a truer spoken, written.

[@brianfeddersen8124]

Well said!

[@65cj55]

Think of the money saved not having children and from the sale of the business on retirement.

[@rotemtomhagbi1937]

He's building one...

[@brianfeddersen8124]

@@65cj55 Why is this even a thing? I think we need to take a breath before we post on a video about engineering and work of this nature about the private lives of those in said video. Seriously now. Sure they may make more money but again as the original thread post mentions who would run the company when Curtis and his partner want to step back? Not that it is any of our business though right?