MAKING AND USING LARGE DIAMETER LAPS

[@davidl.579]

I so enjoy your channel. You even answer questions after 7 years of posting a video. Who does that? For no money either! Robin you are the man. God bless.

[@ROBRENZ]

Glad to help

[@gilbertodiazcastro8871]

Great video. I'm a machining student and haven't had to do any lapping, this sure will make it easier since now I know how to make custom-sized lapping tools. I also like that your videos go directly to the task being shown, no twenty minutes of boring talk and five minutes of actual machining. Very professional. Thanks.

[@ROBRENZ]

Thanks Gilberto, glad you are finding the content useful. Thanks for commenting and watching. ATB, Robin

[@toddpeterson7316]

Stunning craftsmanship as always!!! The laps and end products are perfection. We all appreciate the effort you put forth to produce each week! Thanks again.

[@ROBRENZ]

Thanks Todd, its nice to be appreciated and thanks for commenting and watching! Robin

[@Watchyn_Yarwood]

Thanks for another great video. I appreciate you introducing interesting and unique subject matter that is not otherwise being covered by the machinist community! I always look forward to new videos from you.

[@ROBRENZ]

Thanks William, glad you are enjoying the content and thanks for commenting and watching! Robin

[@Tjousk]

I most certainly found this interesting. Your videos continue to be rather information dense compared to most others I watch. Keep it up.

[@ROBRENZ]

Thanks tjousk and thanks for commenting and watching! Robin

[@sblack48]

I've never seen anything like this. Amazing.

[@ROBRENZ]

Thanks scott and thanks for commenting and watching! Robin

[@stevenshaw9559]

Thank you robin, I am still very young in the trade and your videos have helped me advance my skill tremendously

[@ROBRENZ]

That is great to hear Steven, that is my motivation in doing this so thanks for the engouragement! Robin

[@chuckturner6984]

Hi Robin. I absolutely love watching the lapping videos. Tom Lipton's edge finder was the first one I watched. I am a carpenter and we go down to 1/32" with our measurements. I love seeing that you guys can get to absolute accuracy, as absolute as the measuring tools will measure, anyway. Please continue your videos. Thanks.

[@ROBRENZ]

Thanks Chuck glad you are enjoying them. Thanks for commenting and watching! Robin

[@jurskas7965]

Thank you for the video. You don't find much knowledge available on subjects such as lapping, I am glad your willing to share.

[@ROBRENZ]

Thanks Jurs and thanks for commenting and watching! Robin

[@pierresgarage2687]

Hi Robin, Not so familiar with the ultra finishing work, learning a lot from what you show. This is where KZbin is at it's best, keep the great projects coming, it doesn't make us rich but at least we have fun... lol ATB, Pierre

[@ROBRENZ]

Thanks Pierre, Lots more to come. ATB, Robin

[@megabytephreak]

Really loving the increased pace of videos. Always interesting to see techniques and tools for working with materials a lot of machinists would consider "exotic".

[@ROBRENZ]

Thanks for that feedback megabytephreak and thanks for commenting and watching! Robin

[@EmmaRitson]

this is quite topical around here, so thankyou for posting. these look really good.

[@ROBRENZ]

Thanks Emma and thanks for commenting and watching! Robin

[@bcbloc02]

I feel more precise already!

[@ROBRENZ]

Glad its working for you bcblock! Robin

[@brianu2871]

Being a self employed general machinist for 35 years doing general machining and special machinery it is interesting to see things we do in common, but learning to see skills that you have to do another type of work unfamiliar to me. The trade is extremely diverse and I really enjoy see the skills of others and appreciate your time sharing your skills. Learn from each video.

[@ROBRENZ]

Hi Brian, glad you are finding something useful in the videos. I have learned a few tricks from watching the YT machining community myself. Thanks for commenting and watching! Robin

[@martinmurrell5924]

I just wanted to say "THANKS!", this is a great video, and I used much of your design in building an arbor to lap a new Big End into a vintage motorcycle I am rebuilding. I worked perfectly. I could not have done it without all your clear instruction. Thanks so much!!!!!

[@ROBRENZ]

Glad to hear it!

[@glennfelpel9785]

you sure do keep things interesting! It sure is nice to be able to learn and enjoy doing it.Thank you for sharing, this is fascinating.

[@ROBRENZ]

Thanks for the encouraging words Glenn and thanks for watching! Robin

[@StefanGotteswinter]

Great video, Lapping is something I have not done very much, but I find it a very interesting process - Its hard to find good literature on it. Any chance of getting a shop tour? You seem to have some interesting machinery :)

[@ROBRENZ]

Thanks Stefan, there seems to be a great interest in lapping so much more to come. I wont do a shop tour but I promise you will see everything in minute detail eventually. Thanks for commenting and watching! Robin

[@StefanGotteswinter]

What puzzled me for quite some time now: How do you handle singlepoint threading on the Hardinge without the compound? Do you have another trick up your sleeve or is that just something that does not come up very much in your work? Same question for tapers, do you use a taper attachement or do you put the compound back on? I like the sturdy look of the lathe without the compound and the fact that it makes drilling with the carriage so easy..

[@ROBRENZ]

Single point threading works just fine using a straight infeed of the cross slide for the size threads I commonly do (16TPI and smaller). Most of the materials I use are 416 SS, A2 tool steel, and Aluminum, all which thread very nicely with the straight infeed. I can put the compound back on when I need to and I do have the taper attachment for the lathe. Most short tapers I do with lapped straight tool set on the angle I need and just plunge the angle. Tools are extremely more rigid when the compound is gone so you can do things not possible before. Like plunge a 1" wide form tool with no chatter. BUT now that I have a CNC lathe in the shop I will probably never mess with the compound on the Hardinge for a (non between centers) taper ever again. Thanks for commenting Stefan and keep up your great work!, ATB, Robin

[@forrestaddy9644]

MOST interesting and informative. Among the weaknesses in my technical lore is gage lapping (and metallurgy and gear metrology and...) Many thanks for the revelations. I imagine external laps are designed much the same but inside out with a consricting bolt.

[@ROBRENZ]

Thanks Forrest, an example of small external lapping is in the Custom Calipers Part 1video kzbin.info/www/bejne/a4O9qGiYf8loirM Thanks for commenting and watching! Robin

[@Steve_Just_Steve]

Always love to see a new one pop up from you Robin and always always learn a ton! Looking forward to the more in depth lapping video. Thanks again for sharing another awesome skill with us.

[@ROBRENZ]

Thanks Steve and thanks for commenting and watching! Robin

[@McFingal]

Fantastic information, it's always nice learning something new.

[@ROBRENZ]

Thanks, glad it was informative. Thanks for commenting and watching! Robin

[@imysteryman]

It is easy to tell you love machine work, it shows!

[@ROBRENZ]

Thanks imystery man, I do love what I do. Thanks for commenting and watching! ATB, Robin

[@zatoichiable]

Its so nice to do things you love with good tools available at your disposal.

[@ROBRENZ]

Very true Zatoichiable, thanks for commenting and watching! ATB, Robin

[@sma11]

Hello Robin. I'd like to thank you for spending your spare time filming and sharing your work with the KZbin community. As a machinist, I've only dipped my toes in tool and die work. Your videos are very well put together and absolutely fascinating to watch. I can see the years of experience in through your hands. Great stuff, subscribed and looking forward to your new content. Cheers

[@ROBRENZ]

Thanks sma11 for the kind words and thanks for watching and commenting!

[@Latheman666]

Great video. Thanks for sharing.

[@ROBRENZ]

Thanks Latheman666 and thanks for commenting and watching! Robin

[@VinceSaluto1]

I really enjoy learning new things. I found that very interesting thanks for sharing Robin.

[@ROBRENZ]

Thanks Vince, glad you liked the content and thanks for commenting and watching! Robin

[@clemwyo]

Robin, I stumbled over here from a recommended link on KZbin. Had to add another subscription to the list. Thanks for taking the time to put the videos together, it is very appreciated as you can see from all the comments. Craig

[@ROBRENZ]

Thanks Craig, glad you found the content subscription worthy. Thanks for commenting and watching! ATB, Robin

[@billdlv]

Nice work Robin, very interesting on the lapping. I enjoy seeing all the mods to your lathe too, I have an AML-618 in the shop.

[@ROBRENZ]

Thanks Bill, I will do some videos on the lathe mods. Thanks for commenting and watching! Robin

[@tompas11A3n52KkX]

Very interesting video and a smart construction of those lapping wheels too.

[@ROBRENZ]

Thanks tompas 11 and thanks for commenting and watching! Robin

[@thomasstover6272]

Hi! I’m a fairly experienced hobby machinist, but this is next level for me. Fascinating! Thanks!

[@dougbourdo2589]

Hello Robin. Very nice work. Brad Jacobs sent me/us viewers over. I will be subscribing to learn as much as I can.

[@ROBRENZ]

Thanks Doug and thanks for stopping over and subcribing! Robin

[@alexkern9134]

Looking forward to more videos on lapping, especially interested in lapping parts parallel, like gage blocks. Also looking forward to the stoning video. I liked how you used the lathe to groove the laps. Awesome video Robin. Thanks, Alex

[@ROBRENZ]

Thanks Alex, there seems to be a great interest in lapping so much more to come. That lathe grooving was done before you could even think about taking the part to a mill ; ) Thanks for commenting and watching! Robin

[@travisshrewsbury7169]

great video as always, brilliant work

[@ROBRENZ]

Thanks Travis and thanks for commenting and watching! Robin

[@1jtolvey]

GREAT VIDEO !!! ANOTHER HOME-RUN !

[@ROBRENZ]

Thanks OLD WIPPER-SNAPPER, and thanks for commenting and watching! Robin

[@frankmuller5649]

Always a joy to watch and listen... ingenious design... straight forward... and sounding just to easy to follow... I will try this and of course I'm looking forward to whatever Stefan will come up with. ;) Thank you so much for sharing... very much appreciated!

[@ROBRENZ]

Thanks Frank for the generous words and thanks for commenting and watching! Robin

[@fordguy8792]

Nice work! The final finish was stunning!

[@ROBRENZ]

Thanks Jason and thanks for commenting and watching!

[@mikewalton5469]

very fine work! it was very interesting as well as inspirational

[@ROBRENZ]

Thanks m Walton, glad you liked it and thanks for commenting and watching! ATB, Robin

[@yosmith1]

Fascinating process, Robin! Thanks for sharing

[@ROBRENZ]

You are welcome Neil and thanks for commenting and watching! Robin

[@rdin816]

The information available here is appreciated. I will go so far as to say you run laps around most. Thanks.

[@matter9]

As always another great video! Thanks for taking the time to share your experience.

[@ROBRENZ]

Thanks Spencer and thanks for commenting and watching! Robin

[@barrygerbracht5077]

What did you do with the crack? Was it OK to just leave it? I like your videos. No BS, just high end professional machining showing your expertise. Lots to learn from.

[@ROBRENZ]

Thanks Barry, yes it was ok to just leave it. Glad you are enjoying the content. Thanks for commenting and watching, Robin

[@gandersson6121]

you have a wealth of knowledge Robin. and thanks for sharing it!

[@ROBRENZ]

Thanks Georg and you are welcome. Thanks for commenting and watching! Robin

[@totalcardetailing2022]

Great job!! I know what you mean about never drilling into a parallels. I think we all have seen someone else do it one time lol.

[@rengecko]

Another well presented video on a unique and interesting subject...keep them coming!

[@ROBRENZ]

Thanks rengecko will do and thanks for commenting and watching! Robin

[@markmckenna1353]

very interesting, well filmed, and well commentated

[@philmay7834]

I know nothing about any of this, but find it really interesting and it makes a great watch.......almost calming in a way. What I’ve gathered from watching quite a few hours over the past week is that very little of what we take for granted would be possible without this process. And to think that my father started out as an apprentice machinist for CN Rail back in the steam days. Glad I found this site, and others, dedicated to the machinists art.

[@rtwolfrt]

Great videos mate, moves along at a good pace and lots of technical details.

[@ROBRENZ]

Thanks Rhys and thanks for watching and commenting!

[@evbunke2]

Hi Robin, I recently discovered your videos and I really love them. The kind of work you do is just above and beyond the kind of stuff I usually see. I was wondering, is there any chance you would make a shop tour video, or maybe a couple videos going over how all your equipment is configured? The way your lathe is set up is really interesting, I've never seen anything like it. And I'm guessing you've probably got a thousand other little tricks like that up your sleeve that I'd love to learn from. Thanks for doing what you do! It's very informative and entertaining!

[@ROBRENZ]

Thanks Evan, I wont do a shop tour but I promise you will see everything in minute detail eventually. Thanks for commenting and watching! Robin

[@evbunke2]

Fair enough, can't wait to see it!

[@Kettletrigger]

Another great vid...looking forward to more info on lapping. Would also love a detailed tour of your lathe. That HLV-H is the stuff of dreams. I may never own one, but I'd sure like to see more of it!

[@ROBRENZ]

Thanks Kettletrigger, I will do some videos on the lathe mods. Thanks for commenting and watching! Robin

[@davidcolwill860]

Fantastic videos. Please keep them coming!

[@ROBRENZ]

Thanks David, plenty more to come and thanks for commenting and watching! Robin

[@xmachine7003]

The lessons I get every time I watch your videos,PRICELESS. THANK YOU ROBIN, Chuck.

[@ROBRENZ]

Glad you like them!

[@xmachine7003]

@@ROBRENZ look up Dan Gelbart. He built a lathe,grinder. Air bearings. Interesting.

[@ROBRENZ]

@@xmachine7003 I have watched them all!

[@xmachine7003]

@@ROBRENZ 😂😂of course you have.😉

[@justinm3747]

New to your channel. Stefan mentioned you in a comment on his Archives #3 video and said that you were the ultra precision man. I thought it was a pretty high compliment. Great job on delivering the information with enough depth yet not taking hours to do it. I really like your style of video.

[@johnneundorf1585]

Its a real pleasure watching someone of your caliber make stuff...well done Robin.

[@mudnducs]

I did. Very interesting…thank you!

[@theshed8802]

Great video Robin. thanks for showing how you do it. Greg

[@ROBRENZ]

Thanks Greg and thanks for commenting and watching! Robin

[@cdbflynow]

Good information, and thoughtful editing. Thanks

[@ROBRENZ]

Thanks cdbflynow, glad you appreciate the work involved in compressing the content and thanks for commenting and watching! Robin

[@dartzt1]

Thank you so much! Great video! From a novice perspective its great to watch an expert.....thanks for sharing!

[@ROBRENZ]

You are welcome, Thanks for watching and commenting!

[@warcube91]

Amazing video. I just discovered your channel through you doing the level work with Tom Lipton. You do some truly amazing work. My job is as quality control for an automotive transmission parts supplier and seeing you do gage level work is just mind blowing to me. I hope to see you doing many more videos!

[@ROBRENZ]

Thanks, I will be back at it in Jan 2017. Thanks for watching and commenting!

[@sharpx777]

very interesting, thanks for sharing. wouldn't mind seeing a tour of your lathe and maybe the way you did your fix toolpost (if you ever get around to do it).

[@ROBRENZ]

Thanks sharp x I will do some videos on the lathe mods. Thanks for commenting and watching! Robin

[@dimitar4y]

I fcking love how education this is. This should be the only thing in schools, in addition to some maths to help forecast the work for the office papers. That mirror finish... Is awesome.

[@wallacesaan]

Really beautiful work!

[@ROBRENZ]

Thanks wallacesaan. ATB, Robin

[@bundylovess]

Nice job big thumbs up

[@ROBRENZ]

Thanks Alan and thanks for commenting and watching! Robin

[@tecnobs3d]

Very interesting, thanks for sharing. Cheers from Sweden Bengt

[@ROBRENZ]

Thanks Bengt and thanks for commenting and watching! Robin

[@ShadonHKW]

You may have mentioned the suspension liquid for the diamond, maybe I just missed it. Just water? I find myself drawn to the lapping process, thanks for the great coverage. Best, Stan

[@remodz6385]

This is something I was also wondering. Very interesting, makes me want to go make a bunch of random mirror finish parts, haha. Can't wait for more!

[@ROBRENZ]

That slurry is an oil soluble slurry and the actual mixture is proprietary to the company I used to work for. It allows you to use WD or kerosene for extra lube and to wash all the metal debris away. Water soluble slurries are also available and used for metallographic prep work. Thanks Stan for commenting and watching! All the best, Robin

[@EdM66410]

That was actually really cool man. Nice video

[@ROBRENZ]

Glad you liked it, thanks for watching and commenting.

[@gertskjlstrup1804]

very very nice, thanks for showing!

[@ROBRENZ]

Thanks Gert and thanks for commenting and watching! Robin

[@oxtoolco]

Hey Robin, Nice lapping video. Are you going to be able to use the part that had the crack in it? Long way back to make another one. We had a similar problem with some D2 not that long ago. I wonder if some of the D2 on the market is lacking some quality control. Two cases don't make a statistical argument but you have to wonder. All the best, Tom

[@ROBRENZ]

Thanks Tom, That part eventually gets a matte finish from abrasion in use so the crack was not an issue. That does make you wonder about the D2. I could hear that crack in both the pre heat treat boring and when I was hard turning the bore so I knew it was there from the start. All the best, Robin

[@pierresgarage2687]

Hey Tom, great you pointed out Robin to all of us, he's a great teacher... ;) About fractured D2, last year we bought some D2 with cracks in it, this chunk was previously rejected by another client of our supplier, we ended up paying scrap price for the part, this was all right for us since we were cutting our parts around the fractured portions... Makes us wonder how far this is spread, this is Montreal, North East Canada...!!! Regards, Pierre

[@ROBRENZ]

Pierre's Garage Was that round bar or plate?

[@oxtoolco]

Hi Pierre, After we reject it here in the US it gets send to Canada..... Cheers, Tom

[@pierresgarage2687]

ROBRENZ Some plate like 1.125" x 7" x 30"

[@metlmuncher]

Very nicely done. I really appreciate you making vids like this.. I also need to get me some of that tape to have around. It looks indispensable

[@ROBRENZ]

Thanks Adam and thanks for watching and commenting!

[@davidrussell8689]

Superb quality work . Well explained.

[@isidoromaich7226]

Very interesting Sir! thanks for sharing it with us.

[@ROBRENZ]

Thanks Isidoro and thanks for commenting and watching! Robin

[@pbmachines972]

I watch using a large lap again very interesting thanx for sharing your knowledge

[@ROBRENZ]

Thanks PB Machines and thanks for watching and commenting!

[@lensman5762]

Incredible level of skill and craftsmamnship. Well beyond my ability as an amateur model engineer with minature lathes and mills.

[@animalmother2242]

that coolant arm on the lathe was awesome! more details?

[@ROBRENZ]

That is the standard Hardinge coolant arm with a length of lockline coolant tube and nozzle. Thanks for commenting and watching! ATB, Robin

[@glenlynch9765]

lapsed a taper lock bushing into a steel roller. I had deep tool marks so it didn't come out very good. But it seems to lock onto the shaft ok. Thanks for the video as I need to learn more about lappinv.

[@ROBRENZ]

Thanks for commenting and watching Glen! Robin

[@guillermominardi1211]

muy buen trabajo ! Saludos desde Argentina.

[@ROBRENZ]

Thanks Guilermo and thanks for watching and commenting.

[@jorgescordamaglia1654]

Great video Rob for a useful tool. I noticed a mod on your tool post that I've been thinking to make. To have a solid attachment for it by removing the top slide that in fact is hardly used. If you could ever give us a tour of your shop and equipment would be great. Cheers Jorge

[@ROBRENZ]

Thanks Jorge, you wont be sorry you got rid of the compound slide when it comes to rigidity and repeatability. No shop tour but I promise you will eventually see it all in detail. Thanks for commenting and watching! Robin

[@floodo1]

In a comment in another video Rob talks about having a few dozen tool holders with known Z heights so he can swap between tools without having to re-zero because of the solid toolpost!

[@Baard2000]

Love the dedication! Such a piece on the coffee table...just yo watch daily.....love it...

[@tek4]

good vid, I did find it interesting

[@ROBRENZ]

Thanks tek413 and thanks for commenting and watching! Robin

[@volcanowb]

Ah.... felt so good to be back in the shop again! Thanks

[@jerrylong381]

Hi Rob, I saw a guy hit his parallel once, boy was I embarrassed! But, the loadest or more expensive the mistake, the better you remember it, right. Nice Work, very informative. Thanks

[@ROBRENZ]

Thanks Jerry and thanks for watching and commenting!

[@jsmith6821]

Rob: really enjoyed the large dia lapping; super cool tool ideas ! J Smith

[@ROBRENZ]

Thanks J and thanks for watching and commenting!

[@ericw867]

Hi Rob do you have any suggestions for small O.D. lapping. I can make whatever I need but I don't see a lot out there for O.D. lapping below inches or more in diameter. Namely I'm interested in lapping edgefinders of 5/8 O.D.. or less. Thank you for your channel

[@James-fs4rn]

👍Hi Rob, watching this again. Do you have a recommendation for reference material on lapping? Thanks again!

[@evanlacava9213]

Such a well composed vid, very informative. Nice job on the lap machining! Guess those people who gave it thumbs down didn’t want to take the time to learn 🤷🏻‍♂️

[@hebrewhammer1000]

Wow amazing video. Keep up the great work. thanks you.

[@ROBRENZ]

Thanks Zane and thanks for watching.

[@daki222000]

great video, thanks for sharing. cheers.

[@ROBRENZ]

Thanks Flip de boer, thanks for commenting and watching! Robin

[@RGSABloke]

Robin, awesome work as always. Is there any chance we could have a tour of your workshop, or have I missed that one? Many thanks for sharing your skills and techniques. Kindest regards. Joe.

[@ROBRENZ]

Thanks Joe, I won't do a shop tour but I promise you will see everything in minute detail eventually. Thanks for commenting and watching! All the best, Robin

[@RGSABloke]

+ROBRENZ 10-4, regards. Joe.

[@clarhettcoalfield3616]

Just wow, this was so cool to watch.

[@ROBRENZ]

Glad you liked it.

[@JanMuell42]

Well, I was about to fall asleep but I guess that has to wait for 23 minutes :)

[@ROBRENZ]

That is my goal Jan, If you blink you will miss something important! Thanks for commenting and watching! Robin

[@larrysnell1891]

Thank you. This was very helpful for me. Was starting to use some brass barrel laps and got a lot of pointers and ideas! Great education!

[@vortextube]

Wondered about the galling, yeah moly 👍🏼

[@malachilandis9542]

Sorry to comment on an old video, but what happened regarding that crack? Was it a flaw in the raw material or did the hard turning cause it?

[@ROBRENZ]

Flaw in the material.

[@danielgilbert5312]

thank you

[@3rcamera]

Thank you Robin for making and sharing these video's. I also noticed you have a third bolt on the fix jaw of your milling vise. Is that for rigidity? Did you try to taper fix jaw for hold down? Radu

[@ROBRENZ]

You are welcome Radu, that is a 1/2-13 tapped hole to use my clamp & stud set for holding long pieces down tight on the vise bottom. Thanks for watching and commenting.

[@randr10]

I'm just in the process of rebuilding an early Kioti tractor engine (Kubota engine actually) and your lapping videos are actually helping me do a better job with the honing process. I'm beginning to understand how you can get less than half a thou (the precision limit of my dial bore gauge) within a given specification via these types of operations. I think this engine maxes out at about 2800 rpm, so not exactly going to be seeing huge piston speeds or crazy amounts of strain, but I somehow feel the need to get the amount of taper to within the spec of a 7000 RPM race engine lol. I bet it'll last a long time before it starts to blow by at least :).

[@cnc-ua]

Oh, this is awesome Thanks for sharing. It is massive!!! What kind of abrasive lubrication did you use while lapping?

[@ROBRENZ]

It is 15 micron diamond slurry. The lubrication I was using was WD-40

[@horkinyorkin]

great video, I learned a lot.

[@ROBRENZ]

Thanks and thanks for watching and commenting!

[@andreymitin7911]

Хорошая идея с щитком у резцедержки на токарном станке.

[@Maxi-hs5nk]

Thanks again Robin for showing us your quality work. Can you please tell me what you use the groove in the top of the back vice jaw for? Thanks Max

[@ROBRENZ]

Thanks Maxi77, that is a standard Kurt vise jaw designed for their stop system. Thanks for commenting and watching! Robin

[@joshmedarac8585]

At one point you mentioned cleaning up a shars chuck to make it run a little nicer. Any chance we can see what exactly you had to do? I do like the channel and the content is great. It's going to be a few days before I get caught up.

[@ROBRENZ]

Thanks Josh, I have some video and pics on the chucks. I just need time to edit and post.