DIY Camlock spindle cams || RotarySMP

[@LCalleja]

First here today! Can’t wait to see how you get this done.

[@RotarySMP]

Hi Luke, Thank you for the gift of this fantastic rotary broach. I struggled this week:) Cheers, Mark

[@LCalleja]

Haven’t seen it all yet ill do that after lunch but can’t wait to see how you did them:)

[@whatevernamegoeshere3644]

"how you get this done" Now comes the fun part lol

[@RotarySMP]

@@whatevernamegoeshere3644 He will be suprised :)

[@toma.cnc1]

Luke, thank you for being a good human!

[@robertfontaine3650]

There is something addictive about creating tools to create tools that are only used to create other tools.

[@RotarySMP]

Yeah. Like my wife explained to my sister :)

[@WillemvanLonden]

Don't fret Mark, watching your videos is always entertaining.

[@RotarySMP]

Thanks a lot Willem.

[@rycudas]

Nice one Luke! Seriously generous guy. The composite multi-angle camera stuff is cool! Really loving that you're throwing a screencap of LinuxCNC in there as well. Things going wrong is frustrating for sure, it didn't make for an unsatisfying video though, far from it! It's good to be reminded that even folk like you are just human and have off days. It's good to see the learning that goes with it.

[@RotarySMP]

Thanks for your supportive words. The next attempt at these cams will hopefully nail it.

[@rycudas]

@@RotarySMP you've got this!

[@Watchyn_Yarwood]

👍

[@russelldold4827]

Here’s the obligatory love for Luke. Much admired!

[@RotarySMP]

Thanks for that Russell. Top man.

[@milloons2847]

Always appreciate when Murphy's contribution is also shown.

[@RotarySMP]

Murphy is my Co-Producer :)

[@v3ctors69]

Setbacks are just learning opportunities. Thanks for sharing with us as always. The RPM of the broach is something that seems to be left out, so it was great getting to learn that. Don't be down on yourself for not *completing* the parts.

[@RotarySMP]

Yeah, I was glad to find that one table from the rotary broach experts. My next broach will be HSS.

[@medienmond]

Sometime weeks are just like that, where nothing goes right. Don't panic, sleep over it and then just go on. You can do it.

[@RotarySMP]

Thanks. Will do.

[@seemannseeheim6175]

It's very lucky to have a dude like Luke

[@RotarySMP]

Nice to know there are nice people out there. :)

[@x_ph1l]

Luke not just sent you cool stuff, but I saw that he rescued a bunch of puppies from a burning house! Thanks Luke!

[@RotarySMP]

Thanks for commenting Phil :)

[@purpleidea]

Don't worry about it! It's awesome. I reckon most of us come here to see all the fails. That's what got me hooked on your channel anyways. What fun is it to see professional machinists do everything perfectly? Keep it up!

[@RotarySMP]

Thanks a lot for the encouragement :)

[@Kaschmarik86]

Don't let it get you down mate, I am still entertained and love watching your content😉 and big thanks to LUKE from Malta once again👍

[@RotarySMP]

Glad to hear it! Next attempt will go better.

[@vincei4252]

👍 to Luke. Despite the tools getting chewed up and the occasional bobo you do nice work, Mark. Looking forward to next week's shenanigans. 16:52

[@RotarySMP]

Thanks Vince. On tools like he thin insert cut off or broach, I lack the experience in F&S which I'd normally "feel" on the Boley.

[@GeoffTV2]

Thanks once again for a great video Mr SMP. I realise that the machining didn't go as planned but as a viewer it's still good to see the struggle and it may help when I come to rotary broaching. I did go and watch the live steam recording. It was hilarious seeing all the comment flying in while you're machining, manning three camera setups, the streaming software and the comments. I think you need a buddy in the shop with you on the livestream to watch the comments and change shots (Mrs SMP?). It was impressive that you did it all alone. Bravo! Really enjoying your content. Thanks again - Heather.

[@RotarySMP]

Hi Heather. Thanks for your kind comments. Wonder if Mrs Rotary would be willing (doubt it :)

[@GeoffTV2]

@@RotarySMP 😄😄

[@nelson00-qk5ef]

Luke is the man! Very interesting video as always.

[@RotarySMP]

Thanks for watching it. He sure is.

[@iTeerRex]

Beautiful rotary broach. Very kind of you, Luke 👍

[@RotarySMP]

It sure was. great workmanship.

[@milloons2847]

Love from Belgium to Luke from Malta. Nice tool!

[@RotarySMP]

Thanks for the supporting comment.

[@bigwave_dave8468]

Now *that's* a good friend! --Hooray for Luc. We all want a benefactor that sends us new, custom, useful tools!

[@RotarySMP]

Yeah, he is a real champ.

[@anticom1337]

Hey Mark, can't wait to tune into your next live stream, was loads of fun! Also the video wasn't unsatisfying at all. Failing is part of the process sometimes and we're learning together.

[@RotarySMP]

Thanks y´for you kind feedback.

[@gutsngorrrr]

Great video. It's always good to see some KZbinrs put up their failures, as it shows the process of how you manage to overcome problems etc

[@RotarySMP]

I appreciate that!

[@JoseAlcerreca]

I like this channel because it's closer to a real home shop and failure is also closer to reality 😅 We're here for the journey.

[@RotarySMP]

Thanks for your support Jose.

[@TradeWorksLLC]

I appreciate it more and find myself supporting channels who willingly show footage of the totality of effort that actually went in (mistakes, failures, innovations, trial/error, partial success and ultimately the end result). I know some aren’t always interested in following along with the journey of discovery that we all do while attempting something for the very first time, so I will simply voice my heartfelt gratitude for taking the extra effort to both document and then compile the most helpful parts to make joining in the fun more engaging, easier to comprehend and ultimately relate.) Great job keep it up

[@RotarySMP]

Thanks a lot for your encouraging words.

[@joell439]

If it was easy, anyone could do it. Hang in there Mark. This was a very enlightening video, and perfectly captures the challenges I have in my shop…. And all this time I thought it was just me 👍👍😎👍👍

[@RotarySMP]

Glad you enjoyed it Joel. Work holder is a real challenge :)

[@HansFormerlyTraffer]

Wow Luke...a magnanimous genius. I just realized that I don't have the patients to do precision. I would just get out the grinder and eyeball those camlocks. Run the broach much slower ...redesign the broach. You are not just cutting with the broach you are also displacing the steel. Like thread forming rather than thread cutting. It requires a slightly different shape of the broach. (my opinion. I could be way off)

[@RotarySMP]

What change would you make to the broach geometry?

[@HansFormerlyTraffer]

@@RotarySMP I would look at those hex broaches for hex bolts and study how the geometry works.

[@joeo6378]

Luke, what a guy. A RotarySMP channel MVP. Thank you for your efforts. :D

[@RotarySMP]

Thanks Joe. Good comment.

[@Watchyn_Yarwood]

👍👍

[@TheClumsyFairy]

THANK YOU to whoever donated me a membership on that live stream.. I'm like totally broke, so I can never afford any memberships and the like, so a HUGE thank you, and sorry I can't figure out who it was!!!!

[@RotarySMP]

Thanks for watching that live stream and and video today.

[@jimjam623]

Awesome project! Making that little amount of scrap considering the complexity of this project isn’t at all surprising - thanks for sharing all the failure modes of manufacturing you experience - they make your channel far more educational than just watching a perfect run. Love those multi-shot edits too. What a nice mate Luke in Malta is - thanks Luke! And thank you Mark 😊

[@RotarySMP]

Thanks a bunch!

[@dirtdart81]

Thats incredibly generous Luke!

[@RotarySMP]

It sure was.

[@ethanmiller5487]

Lovely video! A cool idea from a coworker was to mount a clamp for a wet/dry vac nozzle on a Noga mag clamp. Might help with grinding dust... Many nights my shower knows of the grinding dust from my nose. Fun sentence! When I was in the USMC the genny mechs would fix everything with a Gerber and a crescent. Which is probably why nothing ever really worked that well...

[@RotarySMP]

Thanks Ethan. I have been taping the vac hose to the Clarkson with masking tape, and it is not the greatest solution :)

[@steveggca]

Hi Mark first , Luke what a fun new tool/finger puzzle that you sent to Mark. according to the slater tools catalog (page 34) the predrilled hole should be 1.1 X the width of the flats of a square broach (answer to the suggestion that julias-shed made) also according to slater , there should be a 45 degree lead-in chamfer slightly larger than across the diagonal.

[@RotarySMP]

Hi Steve, thanks a lot for looking that up. So my core hole should be about 7.8. Good to know. Roger on the chamfer and thanks for the recognition of Lukes efforts.

[@josephlovell6951]

Now thats how it goes in my shop. One step forward and two steps back. ❤

[@RotarySMP]

Thanks for that feedback Joseph.

[@zxspectum]

It's all good as you and we learn things through these exercises. If it all went to plan it would not be as satisfying when it goes well.

[@RotarySMP]

Good call. I'll try again with an HSS cutter.

[@JCWren]

First, a big thank you to Luke for being so generous. That's just really cool! Second, I really like the 4 panel views, like when you're grinding on the Clarkson. Thirdly, Is there any reason you couldn't backstop the part in the 4 jaw chuck by putting a bar across the face of the chuck for the piece to press against? Obviously you'd have to make sure it can't be thrown clear, so maybe a plus sign shape? Lastly, I don't find it necessary for the parts to be completed and correct to consider it a "successful" video. I enjoy watching the journey and the narrative. So no worries there, mate! (did I say that right?)

[@RotarySMP]

Thanks JC. Considered my lack of experience with the correct F&S using the broach ( and also the insert cut off tool), it is probably better to have the part move in the vise as a sort of fuse. I think I just ran that broach too often at too low speed and with a too small center hole, and the corners dulled a bit. The cutting force probably rose rally fast. thanks for your kind words on the video.

[@squelchstuff]

There's something called a Lathe Spider for that. Edge Technology produce them. They are more to keep the work parallel to the chuck, but also act as a backstop.

[@christopherwiley5859]

​@@RotarySMPReminds me of the advise my dad gave me when he taught me to drive a manual transmission car. You *can* engine break every time, but brake pads are cheap and you can replace them yourself. Transmissions...less so. The fuse analogy also works well -- let the most sacrificial thing get sacrificed first if something goes screwy.

[@willemvantsant5105]

I made 4 camlocks, put collett chuck in 4 jaw and set offset, rinse and repeat without dialling in the 4 jaw for everytime. Countersink the hole before engaging rotary broach. I made a rotary broach but find it is only suitable for brass and aluminium and small sections in steel. I used allen bolts, built up the threads with weld and machined, no need to broach. The camlock studs on my lathe are hardened, the cams are not and they have worn in nicely giving a nice secure transition when tightening and no fear of loosening.

[@RotarySMP]

Thanks for your feedback on the WIllem. I would have thought 7.2mm square broaching would be easier than this. :/

[@willemvantsant5105]

A LOT of force required and a cutter to stand up to it. In theory it should work but in practice I haven't had success on large sections.

[@RotarySMP]

@@willemvantsant5105 Do you consider 7mm square as a large section? I have no sense of scale for the process.

[@willemvantsant5105]

In steel it is getting up there, I have made 8mm hex in brass and came out nice with 8mm pilot drill. I think in your case you have to increase the pilot hole dia, not ideal. Grind a piece of HSS to 7.2 Square, short 7.2 dia lead in and press into 7.2 mm hole, I think a sturdy vise would suffice if press not available. I have had more success with this method. Good luck.

[@Argent911]

All your videos are satisfying, even if they aren't always successful.

[@RotarySMP]

Thanks for that feedback.

[@martinmaurach300]

Hi, you can make a quick & dirty end stop for your lathe setup by installing a piece of bar stock into a collet in parallel with the 4 jaw lathe chuck. Face/turn the stock as required and then recess it past the 4 jaws. Cheers!

[@RotarySMP]

Good tip Martin. Thanks.

[@Julian.Heinrich]

Keep it up, Mark! Loved the slat torque tube insight!

[@RotarySMP]

Thanks for the feedback Julian.

[@mceajc]

Fantastic work, Luke! I have been fascinated by rotary broaches since I first heard of them. Keen to see one in action, and knowing it's possible to make one ... no, no, I shouldn't.

[@RotarySMP]

Harder to use than I expected.

[@TheUncleRuckus]

Mark, you are making progress, you're getting the routine and tool work down for the finished pieces. 👍👍

[@RotarySMP]

Thanks. It is good to machine multiple parts on the CNC, as it forces me to plan ahead more.

[@AndersEinarHilden]

Love => Luke

[@RotarySMP]

Thanks for that Anders.

[@squelchstuff]

Just got to the rotary broach by Luke, so paused to comment. Wow! Craftmanship, and generosity seem to be his hallmark. Well done Sir.

[@RotarySMP]

Absolutely. Stunning work!.

[@Rustinox]

That's an interesting challenge. It's all about to stand up and go for it again after a fail :) And Luke contacted me as well some time ago, but became silent after.

[@RotarySMP]

Hi Michel. It is. I think I'll sacrifice a blunt 10mm end mill for the next attempt.

[@LCalleja]

Sorry about that haven’t forgot what I promised you just waiting on some other things for you :) pls forgive me for the wait

[@RotarySMP]

@@LCalleja Hi Luke, nothing to apologise. Luckily I have a continuous supply of damaged end mills :)

[@LCalleja]

That’s good because it was ent meant for you :) it was supposed to be for rustinox

[@RotarySMP]

@@LCalleja :)

[@somebodyelse6673]

I don't know where you get the 'unsatisfying video' from, I'm grateful to learn from your mistakes instead of mine 😉

[@RotarySMP]

Thanks for your kind feedback on that.

[@menteoumateria]

Hey Luke!!! You are the man!!! Cheers!!!

[@RotarySMP]

Thanks for commenting your support.

[@dirtdart81]

It is a very satisfying video, your final product was a great video about how many ways hard things are hard ❤

[@RotarySMP]

Thanks for your kind comment.

[@steamfan7147]

In my day job I do a fair amount of 1/2" square sockets in parts. I drill the hole 31/64" and then use a 1/8" four flute carbide endmill to machine them square in the vertical mill. It goes fast with a DRO on the mill.

[@RotarySMP]

Thanks for that alternative.

[@ptonpc]

Very cool Luke :) I watched the replay of the livestream. Considering what you were doing, it was really good.

[@RotarySMP]

Thanks for your feedback on that. It was pretty stressful, once things started going wrong :)

[@noberet]

Many things were learned, and thank you for documenting it for all!

[@RotarySMP]

Glad you enjoyed it!

[@stevensmart8868]

Bummer about the steep learning curve on the broaching. I have definitely had similar issues with trying new to manufacturing processes. Still enjoyed the video though. My 11 year old son liked the "nineteen eighty's montage music". Thanks for sharing Mark

[@RotarySMP]

Thanks for the kind feedback Steven.

[@thedasroach7743]

THANK YOU LUKE.

[@RotarySMP]

Great comment. Thanks.

[@theorangebaron1595]

Luke that’s a beautiful looking broach.

[@RotarySMP]

He has excellent workmanship.

[@physicsguybrian]

Hey Mark! Good progress so far. Consider....instead of busting your backside to release a video each week, just release one when you've completed a project. Seems like you have a demanding work schedule. I get it. Same here. Nothing worse for me than knowing I haven't enough time to complete a project so often I just don't start one. Frustrating is an understatement. I can only imagine the frustration of running out of time and feeling you have to put a video out. Just hold off. Finish the project, then edit and release. We'll be here excitedly waiting 👍🏻.

[@RotarySMP]

Thanks for you support on that. It is always a toss up between keeping my routine, so I dont fall right out of it, or having anything it at all. :)

[@squelchstuff]

True words - Choosing your battles wisely is also a good tip. The simplicity of operation of cam locks belies their complexity of manufacture.

[@RotarySMP]

@@squelchstuff I was really surprised how rough Schaublin left them.

[@squelchstuff]

@@RotarySMP I think that is simply down to mass manufacture expediency. All of the working surfaces are properly machined, leaving the unimportant forged surfaces alone, much like an engine crank or camshaft.

[@RotarySMP]

@@squelchstuff I would have expected the cam surface which bears on the pull studs to be machined or ground.

[@MrSeanstuart]

Thanks Luke!

[@RotarySMP]

Good one.

[@Jonathanbaker]

Some good progress tho Mark it’s all about learning. And we are learning with you and I am a machinist well used to be I use the is the loosest term.

[@RotarySMP]

Part fixturing is always harder than it should be :)

[@niemanddings9517]

Check out Inheritance Machinings Video on making a D3-Camlock adapter for his rotary table. He was trying to broach the Sqare holes as well, but settled on milling them. Might be the more reasonable option. Obviously also the lamer option, but hey, from what i've heard broaching is hard. Good luck!

[@RotarySMP]

Thanks for pointing that out. I normally watch all his videos, but must have missed that one.

[@ironhydroxide2]

unsatisfying video? dude, it's satisfying to see others I respect have problems with things, and go about fixing them. I've never been "unsatisfied" watching you go through the process. And i'd much rather see all the problems, than just a "look at us, we can machine this hugely hard thing, perfectly first time" (looking at you titans of cnc) when you KNOW they took a SHITTON of time and tools getting it "right" to film.

[@RotarySMP]

I thought it was only me who struggles with F&S, and especially tool holding. Thanks for your comment.

[@johnmccanntruth]

Wow, this is a rough one. When you were discussing how to recreate the cam lock I thought it looked pretty difficult, I think I was right… Shout out to Cool Hand Luke!

[@RotarySMP]

Thanks John, you were right.

[@steveggca]

Hi Mark at around 13:13 (how appropriate 😀) when the parting tool got crunched ,perhaps a more purpose built tool would be in order Iscar, for example, has a whole line of what they call Groove-Turn & Parting tools .they look much more robust than parting only.

[@RotarySMP]

Thanks for that tip Steve.

[@jimsvideos7201]

One of my college instructors was succinct: "If you go near my airplane with a Crescent wrench, I'll beat you to death with it."

[@RotarySMP]

Hi Jim, that is a good one :) We all laughed at the Aussie tool shadow boards with a cover of the Crescent "NCO only". Our tool boards just didn't have one :)

[@paulfeist]

Time for a a piece of HSS rod and a lot of grinding? Or, a piece of A2 or D2 drill rod/silver steel? Not sure which of those (or neither?) would make a good broach... I've made a form tool for the lathe out of A2, but, it's only been run lightly and only a couple parts... That broach strikes me as a little more abusive to the cutting edge? If it was me (and I'm not claiming to be overly bright....) I'd make 5 of them out of O1, and figure I was going to get one good hole out of each one (hopefully leaving two spares...). Just thinking out loud! I really enjoy watching your challenges as well as your successes, because they make me think, and I don't think enough with my current desk job.

[@RotarySMP]

I dug back through that box of cutters awaiting grinding, and found a 10mm HSS end mill, with a completely missing fluke. That will be the next victim.

[@simonvongunten9288]

Great work Luke! Well there are these days Mark… 🤷🏻‍♂️ still satisfying to watch.

[@RotarySMP]

Thanks for you kind feedback Simon.

[@FreeFlyerUk]

Good video.. because it's educational to see the process, even when they don't work 100%. Ex-RAF techie

[@RotarySMP]

Glad you enjoyed that. If I dindn't post my failures, I would have very few videos :/

[@michaelhaardt5988]

If you think about it, seeing things do not always work out for others either is much more relatable than a quick set of steps resulting in a perfect part and far from unsatisfying to watch.

[@RotarySMP]

Thanks for your feedback Michael.

[@Oberkaptain]

I am collecting the material to make the Hemingway kit rotary broach. should be a fun project.

[@RotarySMP]

It will be. Cool tool.

[@joosteekhof3089]

Good one Luke👍

[@RotarySMP]

Thanks for the support comment.

[@wizrom3046]

Wasn't unsatisfying at all. It's the journey we love, not the destination. I like your comment abo ut Aussies and our adjustable wrenches (shifters). I even have a left handed shifter in my collection, but nobody believes me until I show them.

[@RotarySMP]

You mean like the LH screwdriver :)

[@wizrom3046]

@@RotarySMP ... havent seen one of those, but I legit have a left handed shifter. It is the only one I have ever seen.

[@bulletproofpepper2]

Thanks, Luke! Beautiful broached tool. Need a shoulder on the part for the chuck jaws to lock up to. Just my two cents.

[@RotarySMP]

Good call!

[@bigwave_dave8468]

oh gosh, you mentioned Boeing Surplus (RIP.) I acquired lots of electronics test equipment, countless materials, some shop tools and several spools of teflon wire. I miss that place. Another victim of corporate accountants. Sadly, when Boeing HQ left Seattle, they took the soul of the company with them and the rest is history -- that's when they started to screw up.

[@RotarySMP]

It really was the greatest shopping experience on earth ever! Only time I have ever seen a Monarch 10EE. Shame it didn't fit in my carry on :;)

[@ke9tv]

Luke (Luc?) does lovely work. 👍

[@RotarySMP]

He certainly does.

[@traitorouskin7492]

Nice one Luke!

[@RotarySMP]

Thanks for that comment of support for Luke.

[@badjuju6563]

Your music director needs a raise....... take it out of the swarf monkey's pay ;-) thanks for the video. Thanks Luke. Nice job on the broach.

[@RotarySMP]

Thanks for noticing. I moved from YT's free music library to a an Artlist.io subscription.

[@whatevernamegoeshere3644]

I will just say that I had projects that went on for over 3 years before I finished them or refurbed the components for other projects. It's not always a sunny day, hey

[@RotarySMP]

True. Some go better than others.

[@quakfrosch2298]

Luke rocks!

[@RotarySMP]

He sure does.

[@RickRolling-tc7vb]

Yeah, it's frustrating, but there's always more to learn and failure is an accelerant. The odd failure is like lighting a fire with avgas: a bit is ok and gets things moving in the right direction, but too much and you lose your eyebrows. Or something, idk. Anyway, I enjoyed it and I learned a lot more from you than from the guys that make it look easy.

[@RotarySMP]

Thanks got your kind feedback Rick. And I still have my eyebrows :)

[@AdrianTechWizard]

Very impressed by the rotary broach tool! When grinding in the Bowley, shouldn't you also put some damp rags over the spindle? Dust could enter the gap between the headstock and spindle which would give you a pretty bad day...

[@RotarySMP]

There is a labrynthe seal to protect the main bearings on the Boley, but it is a good point.

[@briswolf]

Wish I had a friend like Luke 🥹

[@RotarySMP]

He is a champ.

[@olestampevestergaard4746]

Knowing where the cutter should be on the broach, would you make a shoulder on future tools?

[@RotarySMP]

On the next one no, as I found a 10mm end mill, with a ruined fluke which will work, but yes, it is a good idea if I need another silver steel tool.

[@flikflak24]

Maybe you should make a backstop for the lathe spindle ? I remember using them when I had parts that I wanted to not move back in the spindle/chock at all ( since it was screwed into the back with counter clockwise threads so it only tightened itself instead of loosing)

[@RotarySMP]

Probably a good idea, once I have the F&S dial in. As long long as I am learning, having the part slip is probably like a fuse.

[@flikflak24]

@@RotarySMP most cam programs gives you the right speed depending on what feed pr. rotation you tell it ( a mobil app for that witch i like to use is called "cnc tools" ) and the feed pr. rotation is normally on the back side of the box the insert comes in ( there recomended max. P mean's steel and N is aluminium,brass and copper for almost every insert produser just incase you didnt knew )

[@alanclarke4646]

Love to Luke

[@RotarySMP]

Thanks for commenting that Alan.

[@subuser9627]

That is live, shit happens. New plan or ask a friend... I had good results with a milling machine and a small end milling cutter, first drilling out the inner diameter.

[@RotarySMP]

I considered that as well. Good reminder.

[@MattBaker1965]

Nice Broach Luke

[@RotarySMP]

Hi Matt, thanks for the kind words of appreciate for Lukes workmanship.

[@alinioanmoroi1370]

Awsome guy...love Luke!

[@RotarySMP]

He sure is.

[@niemanddings9517]

THANK YOU LUKE!

[@RotarySMP]

Good one. Thanks.

[@danbrittain446]

could you not put a parallel or similar behind your piece in the lathe chuck to stop it being pushed back?

[@RotarySMP]

Hi Dan, I could, but the slippage is probably a good fuse when the cutting forces get too excessive due to blunt cutting edges.

[@patrickgrochowy]

Thumbs up to Luke, again ... :-) 👍

[@RotarySMP]

Top man!

[@endemiller5463]

Thanks Luke!! Do you reckon you could make a broach too!! God Bless

[@RotarySMP]

Luckily I have a continuous supply of murdered end mills, and went back through that box to be ground, and found one I should have used the first time. ;)

[@samrodian919]

Yay! Luke's rotary broach Rocks! Not so the cutting tool lol . I'd try grinding up a carbide one from a broken end mill to see if that works. It can only waste one evening surely? Lol

[@RotarySMP]

I took the middle road, and am making the next one from HSS.

[@TrPrecisionMachining]

very good video RotarySMP

[@RotarySMP]

Thanks for commenting.

[@petermurphy5138]

Mark, 75Sqn trip to Australia, was that to Townsville in the early 80’s by any chance?

[@RotarySMP]

Must have been 90, or early 91. To the F-18 base a couple of hours north of Sydney Is that Amberly?... ... just looked it up, it was Williamstown.

[@craigbossard399]

Smooth collets struggle with grip. Maybe try serrated.

[@RotarySMP]

I am just pulling down that indexer, to see if I can add an anti rotation pin.

[@alanclarke4646]

Hi Mark. Next project = custom wrench for the indexer?

[@RotarySMP]

It just need to be diassembled, and a hardened anti rotation pin for the collet added.

[@MikelNaUsaCom]

on the bright side, is all the practice with the 4 jaw... =D Also, at least with the failures you can have the confidence that you are making chips. I'm lining up a few projects to do over the winter... the hardest part for me, is understanding that I'm human, and I'm doing them as something in my free time... Hobbies don't really have deadlines... and it's more about the journey than the destination. Let yourself be human... at least that's what I keep telling myself. =D Happy Sunday!

[@RotarySMP]

Very true! Thanks Mike.

[@Guds777]

Someone need to invent a 4 jaw chuck with high torque micro servo motors that can rotate each jaw screw. Than you can just program the offset. And of course it needs to have encoder for position sensing. Also cheers for Luke...

[@RotarySMP]

It would need coolant and High G resistant electronics. The easier solution, is highly dynamic X axis server which just turns the excenter into the centered stock.

[@H.v.G.]

Der Taumelkopf ist für diese Anwendung ungeeignet, da der Anstellwinkel mit dem Werkstück rotiert. Hierdurch kommt einen Taumelschnittbewegung zustande. Dieses Werkzeug muss angetrieben werden, wobei das Werkstück steht. Wenn das Werkstück rotiert, muss der Anstellwinkel (1-2°) auf der Achse konstant bleiben.

[@RotarySMP]

Bist du sicher? kzbin.info/www/bejne/qoOkooeOorKVhLc Es kann sein dass ich die Geometry dieses Broach incorrekt beschrieben habe.

[@H.v.G.]

@@RotarySMP Ja, da bin ich mir absolut sicher. In dem von Dir verlinktem Video ist es tatsächlich sogar wunderbar zu sehen, die Schneide liegt immer mit exakt demselben Winkel an der Schnittkante - woher soll der Taumelschnitt auch kommen, wenn sich Werkstück und Werkzeug in gleicher Geschwindigkeit mit unveränderter Schneidenpositon drehen? Wenn das Werkstück dreht und das Werkzeug synchron mitläuft, muss die Achsneigung unverändert bleiben, da die Achsneigung den Pendelschnitt erzeugt. Das Werkzeug, welches Du verwendest, würde z.B. in einer Bohr- oder Fräsmaschine funktionieren, da mit dem Drehwinkel die Schneide taumelt und sich tiefer in der Werkstück eingräbt. kzbin.infoJ2OAISkHHbI?feature=share Auf einer Drehmaschine muss das so aussehen: kzbin.info/www/bejne/n5jcgWmMjKmpjc0

[@H.v.G.]

@@RotarySMP Hier ebenfalls sehr schön zu sehen, das Werkzeug rotiert mit dem Werkstück bei 1° verstellter Rotationsachse (hier durch Drehen des Obersupports erzeugt) kzbin.info/www/bejne/eqHPfamaZ9GKf68

[@timogross8191]

Verstehe ich nicht. lt. Videos von "This old Tony" und anderen, kann das selbe Gerät auf der Drehbank oder auf der Fräse benutzt werden. Ob das Werkstück oder das Werkzeug sich drehen müsste egal sein oder? Oder wir schreiben aneinander vorbei. 🙂

[@H.v.G.]

​@@timogross8191 Es spielt keine Rolle, ob das Werkstück oder das Werkzeug sich dreht, der Unterschied liegt in der Positionierung des Taumelwinkels. Der Taumelwinkel darf keinesfalls mit dem Werkstück rotieren, er muss im Bezug zum Werkstück immer eine Differenzbewegung ausführen, sonst kann das Werkzeug nicht schneiden. So wie RotarySMP das Werkzeug verwendet, rotiert der Taumelwinkel mit dem Werkstück mit, wodurch in der Relation keine Umpositionierung der Werkzeugschneide erfolgt. Wenn das Werkstück rotiert, muss der Anstellwinkel des mitlaufenden Stempels immer an der selben Stelle bleiben. Wenn das Werkstück steht, muss der Anstellwinkel rotieren um die Schnittbewegung zu erzeugen. Wir haben diese Werkzeuge seit über 40 Jahre in der Uni in Verwendung und ich weiß, dass die Azubis immer einen Knoten im Kopf haben, bis sie diese Teile in der Funktion verstanden haben. Der Punkt, der verstanden werden muss ist, dass die Werkzeugschneide zum Verrichten ihrer Arbeit eine Kippbewegung ausführen muss, was sie aber nicht kann, wenn das Werkzeug synchron mit dem Werkstück läuft. Es ist das gleiche, als würdest Du mit einer Fräser, der in einem mitlaufenden Futter gespannt ist, versuchen eine Bohrung auf der Drehbank vorzunehmen. Da der Fräser synchron mit dem Werkzeug läuft, findet keine Spanabhebung vor. Bei den Taumelköpfen gibt es zwei unterschiedliche Systeme: 1. Die gesamte Lagerung ist der Rotationsachse gegenüber um 1° angestellt - diese Taumelköpfe funktionieren auf Dreh- und Bohr- (Fräs-)maschinen. 2. Die Lagerung läuft mit der Rotationsachse konzentrisch, der Achsversatz erfolgt innerhalb des Lagers. Diese Taumelköpfe funktionieren nur auf Bohr- oder Fräsmaschinen, bzw. bei (CNC)Drehmaschinen, bei denen das (angetriebene)Werkzeug in entgegengesetzter Richtung des Werkstückes dreht. Die Taumelköpfe von Punkt 1 sind vielseitiger und können auch durch einfache Anstellung des Obersupportes nachempfunden werden, was den enormen Vorteil hat, dass die Werkzeuglänge frei wählbar ist, also unabhängig vom Taumelkopf. Die Taumelköpfe von Punkt zwei laufen vibrationsärmer und können mit höheren Schnittgeschwindigkeiten gefahren werden. Das Werkzeug ist unempfindlicher gegenüber dem stirnseitigem Anschliff, einfache Hohlschliffe, wie im Video gezeigt, sind zulässig und führen weniger zu Profilverzerrung/Profilverdrehung.

[@tcratius1748]

Cam locks looks hard. Maybe you should build a 5th axis on the maho

[@RotarySMP]

Yeah, go for the simple solution :)

[@tcratius1748]

@@RotarySMP , in hindsight, that was a crap idea. When looking at Chinese CNCs, it seemed to make more sense to have a fourth and fifth-axis addon as it would compensate for the lack of machining skills that require regular practice.

[@tcratius1748]

@@RotarySMP Also, you could use a fine end mill, say 1-1.5mm bit, on the maho to make an almost square hole. It seems feasible because, as you mentioned, the slop isn't an issue. As such, I can't see why a rounded corner wouldn't matter either.

[@tcratius1748]

However, you would need a V block to hold it in the vice. Anyway, just ignore me.. I'm a backseat machinist :P

[@RotarySMP]

@@tcratius1748 Nothing gets easier at 5 axis. :)

[@andrewh2341]

Like the content, kinda prefer what you used to do with background music in the past though. The hard guitar licks make it sound like a tool commercial where they try and make the tool sound “hard core”. It clashes with your calm, informative, and thoughtful style.

[@RotarySMP]

Thanks for your feedback on that Andrew. I switched from the YT music library to Artlist.io, and am a little overwhelmed with choice :)

[@Watchyn_Yarwood]

Agree 100%!!!

[@Watchyn_Yarwood]

@@RotarySMPThis music? 👎👎👎

[@RambozoClown]

It's nice that you show the things that don't go to plan. Seems to happen a lot. I wonder if that is by design? Slightly worried that you work in aviation. 😱

[@RotarySMP]

It is mostly driven my desire to to a video most weeks. I know if start waiting for everything to be perfect i will probably never do another video.

[@gordon6029]

Excellent video!

[@RotarySMP]

Glad you liked it!

[@julias-shed]

Think the pilot hole should be oversized for broaching? 😀

[@RotarySMP]

Hi Julia, I think you are right. Any suggestion how far oversize?

[@steveggca]

@@RotarySMP according to the slater manual it shoud be 1.1 x the flat width

[@julias-shed]

@@RotarySMP I've not done any broaching myself but remembered that from the @ThisOldTony video?

[@MattBaker1965]

I sure you'll sort it out dude

[@RotarySMP]

Thanks Matt.