Lathe Stop!

[@Blondihacks]

Lots of good theories on the 94°, but I think the most convincing one is that it’s so they can easily grind the mating surface on the carriage with a 90° wheel and not have to worry about clearances. Sounds plausible to me! And yes I know tongue and grooves and mortise and tenons are all things that people want to know that I should know.

[@combin8or]

(Al + Fe) * hanky panky = galvanic babies

[@JustMe-gz4pu]

Ask Mr Pete. The KZbin shop teacher. If he doesn’t know no one knows.

[@393strokedcoupe]

I'm gonna have to use that precision cat hair tip, although mine would be precision dog hair. I wonder how that scales? 😉

[@nadam35]

#MetricDegrees

[@reinisveips1448]

I recently both watched this video and skimmed Moore's Foundations of machine accuracy. Page 56 concludes that 90 degree V-way is the "best practical choice" (for measuring machine design, that is).

[@0.zz.y]

Just wanted to say...I have just bought my first lathe, an emco unimat 3, I know it's a baby but hey it's a lathe. After 2 weeks of taking it apart, cleaning everything and putting it back together ( I dont know why I do this but I do it with everything haha), I have faced off and turned my first piece. It is thanks to you and your brilliant videos that my first (okay second 😁) piece came out so well. Keep up the great work. Now I need to shop for a bigger lathe haha. Regards, Elliot

[@wheelitzr2]

I also take everything apart before I can use it, for whatever reason my brain can't use something if I haven't looked inside of it yet.

[@robertoswalt319]

Congratulations on your first lathe. Don't feel intimidated with the size of other people's lathes. It should provide you with years of satisfaction and fun projects.

[@leerogers6423]

Your in the right place to learn how to get the best out of your little lathe, stick with it.

[@pnt1035]

I still have the Unimat 3 I bought in my youth, and 40+ years on it's still in regular use, in front of and a little to the right of my Myford Super 7. Get some good 1/4" HSS tools, keep them sharp (a small oilstone is an essential accessory) and it will give good finishes on almost any metal and serve you well. The only things I can't do on mine are threadcutting and "big stuff", though I made a couple of tailstock die holders for (and on) mine and you might be surprised at the size of some things I've been able to do, with careful setups. I was lucky enough to find a Unimat collet chuck cheaply because it had only one collet and was missing the backplate; I machined a new backplate from cast iron and made a couple of collets, machining the slots in them with a setup not unlike Quinn's with a universal slitting saw arbor and small second-hand slitting saws. Much later, I bought an ER16 collet nut which has the right thread pitch but larger diameter and added some helicoil, so now I can use both original E16/ES16 collets and modern ER16 collets.

[@0.zz.y]

@@robertoswalt319 thanks for the reply. I have already fell in love with it. Any books or ideas on good first projects? I've got a few small projects lined up but only tiny things.

[@mariodesurra1443]

You are without a doubt the consummate machinist, bar none!! Your explanations, your quips, your clarity are the perfect mixture of valuable information and wonderful levity that make you nothing short of genius! You are a treasure and have earned your place as an inspirational KZbin phenom!!! It’s obviously you are passionate about what you do😊 thank you!!

[@silviofrezza-zv1ud]

Such a pleasure watching and hearing you! Learning so much… you are the greatest!!!

[@Peter57808]

An option for thread in Aly is to fit helicoils, these are a thread repair system which installs a S/S coil, in the shape of the required thread, in the hole. Have used them extensively on Aly motorcycle engine cases and the new thread is extremely strong.

[@jimsnotreal]

94 degrees is just more degrees for your money. Added value 👍

[@elalesitoreal3638]

The way you explain things and the beauty of your hands make this video hypnotic... Awesome

[@jefffair4540]

Big Muskie, I can remember going with my father to watch it work back in the early 70's

[@timothyball3144]

Just so you know, a TOT video came up while was watching this and I waited until this was done.

[@Blondihacks]

Wow, that’s the highest KZbin praise. 😁

[@barryfields2964]

I’m going to watch that one as soon as I’m done here.

[@barryfields2964]

Blondihacks I’m watching yours first because your hands are cuter than Tony’s

[@machinist7230]

@@Blondihacks It's a good one too - Tony has discovered tool steel filler rod 😁

[@rustedfriend]

@@machinist7230 Yup, one more reason that I need to learn to tig weld. And get a welder.

[@seabeepirate]

Thank you Quinn for many hours of entertainment and education.

[@SethKotta]

What you said about tenons is 100% correct.

[@Blanco22]

Interesting, I picked up on that as well but I have never heard of it, I wonder does the species have another name?

[@15DAVIDYOUNG]

Learning so much from these videos after acquiring a British made Myford ML10. Very educated lady. Many thanks from over the pond🙂

[@theperl9663]

I use the angle blocks, tends to make affordability a reality, but this is a comment on an old video which probably will never be seen , keep up the good stuff

[@markwarner5554]

As a woodworker, I enjoy your occasional sniping of woodworkers.

[@scottrowlings5345]

I don’t come here for the engineering content anymore, just the woodworking jokes!

[@HanstheTraffer]

There ought to be a word like "Yahtzee" to describe that beautiful fit and slide.

[@robertpearson8798]

My vote would be “shwiiiing”.

[@gary.solexa]

You have a very clear way of explaining things. Nice work!

[@gregoryskaggs656]

Still laughing about "scar upon the earth" segment. You rock!

[@grayskwerl4973]

I like the angle blocks, as opposed to the sine bar. You used them for their intended purpose. As others have said, I like the way your mind works. The things you learned from the plastic part were used to make a better metal part - and all of us learned how to make a better carriage stop. + Thanks +

[@freedtmg16]

I've been wanting to make one of these for my grizzly lathe of similar casting but didn't know where to start. perfect timing!

[@stevesfascinations1516]

Thank you so much for your videos Quinn! I have a lathemaster 9x30 which seems to be close to your lathe. I used your thingaverse model to print out a plastic lathe stop and it worked perfectly! You are an inspiration to everyone with a hobby shop!

[@rexmyers991]

Very nice job. Very satisfying to see it work so well.

[@Alterscapes]

For some reason, my brain really wants to sing the title of this video to the tune of "Love Shack" by the B-52s. Thought someone might appreciate that. Or not. Either way, great video!

[@Blondihacks]

It’s a little old place where we can get together

[@donswords6671]

Just made this. Not precise as per plans as I'm a newbe.. I was uncomfortable with how close the cap head screw hole "could" be drilled to the indicator hole. After a head scratch or two I decided to skip the clamping feature and slit. I drilled a hole in the end level with the indicator hole for a set screw to secure the indicator. Very happy with the result. Thanks Quinn for the outline/idea.

[@Blondihacks]

Excellent! Nice to hear someone else made it

[@JBLewis]

As a native Ohioan, I appreciate the "Big Muskie" reference!

[@Clough42]

My local tool supply carries Thurston HSS slitting saws. I have had good results with the 2.75" x 0.040" 72-tooth blades on my small mill. I usually run 400RPM in mild steel and a little faster in aluminum, definitely in the conventional direction only unless you have ball screws. I did make my own TTS-style arbor, which is very rigid, but the saw still runs out.

[@Blondihacks]

Yah, real machinists tell me that 100% of slitting saws run out. It’s part of why they say to take deep cuts with them, otherwise one tooth does all the work.

[@jeffanderson1653]

You struggled with this one a bit. You are human! Thank you for the idea.

[@MrRhysBrown]

Today I learned about tennons. I will be sure to use this triva in polite conversation at the next dinner party I attend

[@phildcrow]

"We're going to create a scar upon the earth for which God will never forgive us." Comedy gold, I tell ya!

[@damiendoyle9948]

My knees buckled when I saw your tool list. I've a long way to go.

[@CptAwwsome]

Congratulations! You found the 94° Easter egg!

[@marcmckenzie5110]

Very nice. The next day I’m able to work in the shop, I’ll make this stop based on your 3D drawings, the materials are laid out.

[@robertbownes6718]

Darn you! I just finished designing and 3D printing one last week! Now I have to make another! :)

[@addisongardner1989]

Excellent job, Quinn, as always. Love watching your work.

[@davekimbler2308]

You must be either from Minnesota or Pennsylvania with reference to the biggest dragline ever made ! I’m a Minnesotan ! Yaah sure ya betcha !

[@capnthepeafarmer]

Slitting saws are what I use on my CNC all the time. Helps reduce ops. I use a 3.5" diameter 72 tooth carbide saw, 0.058" thickness. It's quick satisfying to have a very thin web at the end.

[@robertpearson8798]

Better than nothing vertical mode is a very apt description.

[@georgetouliatos5972]

I've been forming an idea to make a stop for about a week now and your video came at a perfect time. I made a wooden prototype that includes both a dial holder and a stop. I assumed that the "way" angle was 90 degrees, apparently it isn't. Thanks for pointing that out.

[@rpavlik1]

Smiled pretty big when you eventually got around to saying the word "overconstrained" since my brain was going "overconstrained?" since the beginning. What weird geometry, but as these tools have been around a long time and are well understood, I assume there's a useful reason for it.

[@txranger43]

Excellent, I have been needing one of those and now I know what to do. Thanks!

[@localele1]

Another great little episode.

[@crazyflyboy30]

Hey Quinn I been watching you TOT and Stefan for a while and had to get started in Machining so got me 600 lb. Muster a Bolton Tools 500 lathe/ mill combo and I have been buying all my tooling equipment and metal from Ebay . I had a good laugh on your video about the first lathe project was a ring and before I saw your video my first thing was in fact a Titanium ring I made for myself.

[@coolsaffi]

Great video

[@wildonpriddy1800]

Great job

[@combin8or]

Seems like a good use case for a dab of Moglice. Granted, it’s overkill, but you wouldn’t have to muck around with trying to hit weird angles. And you wouldn’t lose sleep over the inevitable galvanic hanky panky between the Al and Fe.

[@brianhaygood183]

You might put a horizontal threaded hole a little to the lathe side and above the indicator. You could then use a screw and a jam nut as a physical stop without having to remove the indicator. You are likely going to want to use the indicator to position your physical stop, at some point.

[@debonh3828]

Joe Pi has shown a neat slitting saw arbor.

[@austinedwards9846]

Loved this vid. Thank you for showing all your mistakes.

[@michaelwest4325]

Love the Big Muskie reference. Muskingum Coal was south of where I lived in Ohio, my Dad went to see it running as a child. Sadly I believe only the bucket remains.

[@Blondihacks]

That is sad! An incredible machine.

[@oudaytbader3448]

You have done amazing job

[@ryanpeterson5239]

I would bet the 94 degrees is not intentional. they just throw it in the surface grinder and whatever angle comes out, they can fairly easily match the carriage to it

[@smellsofbikes]

I'm always lagging behind what you're doing so I'm off to make a 3d printed carriage stop. What a great idea. And, yeah, a slitting saw in the mill always looks just terrifying. But boy they do a fantastic job.

[@rwfisheriv]

Thermoplastic is great for making an impression that you can scan (or measure...) and import into your 3D CAD software.

[@glennmoreland6457]

"a centre cutting 2 flute end mill" That's a slot drill Quinn...🇬🇧👍

[@piman3072]

Edge Technology makes a pretty nice one of these for $60 with the indicator included.

[@MrAmalasan]

Hammer time!

[@Clough42]

I just checked the front v-way my Grizzly G0602, which I've always assumed is made from essentially the same castings, and to my surprise, it's square. No idea why the PM would be 94 degrees. I wonder if they're all that way or if yours is a unicorn.

[@Blondihacks]

Wow that’s really interesting. The castings are the same, I’m sure, but they must grind them differently. I think Weiss makes the PM machine.

[@David_Best]

Blondihacks I just checked my PM1340GT and it’s 90 dead on. Maybe the one precision square used on mainland China is out of calibration. 😁

[@roscopcoldtrain8849]

There's 180 degrees in a straight line. Substract the 137 from 180 and you get 43 degrees. Substract 43 from 137 and you will get 94 degrees left over.

[@z90012]

Great stuff

[@peterpocock9062]

Hi Quinn, thank you for another useful video. I appreciate the time you put in beside filming the event, is large. I would like to help you with a bit of advice, and, for many others I see do the same thing. (Don't think I'm singling you out). When using a hack saw, please use two hands, one on the handle and the other on the frame front. Your blades will last longer, your cuts way more controlled and your fingers will love you even more. The hacksaw is one of my "go to" hand tools, I have three with different tooth pitch blades fitted, adjacent to my vice. I used to train machining apprentices and the file and hacksaw were major learning points for them. Please keep your vids comming, they are aimed at the right demographic of machine tool owners. Well done.

[@Self_Evident]

♫ Stop! Carriage of my lathe, before you break my part... Turn it o-o-over... ♫

[@firebird8600]

Yay Blondihacks time!!

[@backwardsmachining7526]

Dang I thought for sure 90 degrees...my whole life has been a lie.

[@nickwheeler8231]

I made something similar, but use it as a dead stop instead of an indicator holder. The tenon is OK for a printed part, but is a pain if machining one. All that's actually needed is a retained pin superglued into the holder, and a slightly oversized hole in the clamp bar. Much, much easier to make! It's used nearly every time I use the lathe. and after six year's use the locating notch is starting to spread, so I'll eventually replace it with a steel part.

[@freemansfreedom8595]

The deformation in the plastic for the stop is a problem if you use the auto feed. However, for a student, where it has to do manual feeds, it is a god send. If I get in, I am designing and printing one of these for the lathes where I will be studying at, that is for sure.

[@randynovick7972]

Fascinating to watch. Ninety-four Degree achievement unlocked!

[@weldermike7017]

Looks and works great, good job!

[@jimfurman3145]

Love your projects ... making your own tools!

[@sten1939]

Wow “ the Big Muskie” how many of us understood that reference:-)

[@paulmorrey733]

Thanks Quinn

[@stephenwalsh5376]

Hi Blondie. On this side of the pond, a slot drill will cut a hole through solid material, ie without a pilot hole. Slot drills are usually 2 fluted but can also be 3 fluted, these are called FC3's or 3 fluted slot drills. I'm not sure what the FC stands for but who needs to know? End mills will NOT cut a hole through solid. As the manufacture and supply of quality cutters is limited to only a handful of brand names that, importantly, also have a worldwide reach, it is very likely that the same terminology is used in every English speaking country. Here i the UK, this definition IS WRITTEN IN STONE! Hope this helps to stop all the confusion that I hear so often in the USA.

[@arborvitian]

Chuckle elicited. While not good at all, the better than nothing mode has gotten me by for years and years. A better sawing solution is just EXPENSIVE.

[@CapnCrusty]

Another way to remove that clamp from the block is to bandsaw it off from the chunk and then mill the sawcut face to dimension. I feel the same way that you do about slitting saws and I usually find a way to avoid using them. For instance, when I'm making a clamp in steel I just use a super thin cutoff wheel in my angle grinder to make a narrow slit.

[@johnapel2856]

Neat! Ahh...Zen machining break... And don't call me Surely. Thanks, and Meow to Sprocket.

[@Reman1975]

Looks good. This is my kind of machining. Measure twice, Cut once, Test fit........... Realise the dimensions on your carefully drawn plan don't quite work in this real world application, Cut again, Scratch head, One last cut, Swear a bit, A few final dimensional tweaks with some files, Job done ! :D I occasionally feel like my lathe tools are only there to rough things out before I get them to final diameter and parallel using emery cloth ! LOL ! One little thing to note though. It's always good to have the DTI only just clamped tight enough to stay put in normal use. If you forget it's there it's usually better to have the carriage push it out of the clamp so it can take it's chances dropping into the chip tray than to risk crunching the gauges internals. Alternatively, fitting a bolt into the right hand face of the clamp as a stop to hit before the gauge bottomed out also works pretty well.

[@AdventureswithJane]

Nicely done, as always. Now to make mine. 😊 -Mark

[@jerrycoleman2610]

Quinn, Awesome really enjoyed watching your video and thanks for sharing.!.!.!.

[@martinhansen2315]

Good job, normally I would expect to use the 3D printing to refine your design before whittling metal. On that point I must get round to changing my end stops from 3D printed versions. I would guess an angle slightly greater than 90 degrees is used so it is possible to grind the sides of an internal V using the radius of the grinder (or possibly shaper) whilst maintaining side clearance.

[@droppedpasta]

If you ever want to complete your set, I could send you some of my Precision Labrador Hairs. The tortie hairs I’ve got claim to be precision, but they vary unacceptably. Maybe a sine bar for a future project?

[@VoidedWarranty]

I made a very similar one years ago but I bolted a hacksawed off micrometer end to it so I had a micrometer adjustable stop for facing a part to length

[@Just1GuyMetalworks]

Nice 😊! I've been putting off making one of these for quite some time. 94° does seem a bit odd. Maybe it reduces the likelihood of the carriage trying to ride up and reduces friction?... I can only speculate 🤔. Thanks for sharing, Quinn! Thoroughly enjoyed 😁. Cheers!

[@l3d-3dmaker58]

you need to make a sine bar ToT style! would be a fun project to see

[@Valery_1954]

At the edges of the clamp, it was necessary to leave protrusions. 😀

[@ALXG]

Quinn, this is Brilliant! Your lathe stop is cute 🥰 Like all other stuff you make) And humor too)

[@protospace270]

I laughed a lit harder than I should have at "punk ducky" hahaha.

[@calaban9]

Off topic but the you tube featurette from ILM on the mandelorian razorcrest mentions hobbyist machines and features a quick view of a Precision Matthews logo plate ... so you’re in great company.

[@classicbandgeek]

94 Degrees, the oft-forgotten discount boy band of yesteryear

[@RVJimD]

Quinn, I would love to see a video where you solve the cruddy table on the vertical position of the bandsaw! I have always thought, “this saw works pretty good in the horizontal position but it is terrible vertically “ it reminds me of one of my favorite episodes of Underdog where he unknowingly gets a sword in his uniform and says, “when I stand up I’m as right as rain, but when I sit down there’s a stabbing pain” thanks!

[@Blondihacks]

In fact I have that project on my list! Those “tables” really are beyond terrible

[@RyJones]

Look at this: en.wikipedia.org/wiki/Picatinny_rail the clamping force is on the beveled edges.

[@davidyisrael007]

When I was in machine shop, we would hand file and triple check. You dont always have to use a mill to get a precision angle or fit.

[@alanb76]

I recently made a 3D printed chuck cradle for a new PM-1228 Lathe. I assumed the ways prisms were 90 degrees, and they did seem to be, getting the height took a couple of adjustments but the 3D part fit well to both prisms and flats. I checked them more carefully after seeing this video and they do seem to be 90 degrees as precisely as I could check with a square. This lathe came with a metal stop, but it doesn't seem to fit all that well. Another project for the list...

[@kBIT01]

How do you like the 1228. I've been looking at it.

[@alanb76]

@@kBIT01 I like it a lot, it was about the most I could find in the PM line that was 120V. It's a big step up from the Grizzly G0516 I had before. Support from PM has been good too.

[@matthewsabol3066]

Very nice video. Well done and easy to follow and listen to. I will definitely build one of these machinist hammers. Easier to machine the central head tap on the milling machine, as you mentioned in the video. I would rather drill thru & counterbore the head for a #10-24 SHCS and tap the end of the handle for same, then c’bore the opposite side (180 degrees on center of the clearance hole and c’bore) for the handle to fit into the turned diameter. Keep up the good work.

[@Ray420C]

Very nice video

[@Jarlerus]

I know even less about machining, but I know about affordance :) The differences in angles can be so that things can't easily be mounted backwards. I have no idea whatsoever what that would be, but asymmetry can be a design tool to make users think twice about "is this mounted correctly?"

[@allbeit582]

Hi Quinn, Just now taking a break from making a carriage stop and saw this. I checked my lathe and found the bed V to be bang on 90deg. Mmmm interesting.

[@AB-ku4my]

Your woodworker "friends" are having you on, cos that's not a mortice 'n' tenon, it's a tongue 'n' groove joint.

[@wolfitirol8347]

The 94° is for the chips that they don't lay on an even surface Blabla 🤗🙏

[@TheDogWalksTheDog]

The first “tappy tap tap” is free !

[@kgee2111]

Great job!

[@jody6183]

I think the master angle block all the Chinese CNC's are calibrated to could do with a regrind 🤣

[@howardosborne8647]

That's similar to my theory. The Chinese lathe factories all borrow the same knackered old protractor. Nobody has thought to check it for accuracy yet.

[@MachiningandMicrowaves]

More likely they copied the angle off my 1982 Colchester 1800

[@jody6183]

@@MachiningandMicrowaves 🤣🤣🤣

[@bobuk5722]

Hi Blondihacks. I've been thinking. I know! If the ways are ground 90° plus to allow the accurately 90° milled carriage to sit on the ways why not do the same thing for the stop? There would be a narrow line contacts on each side of the way 'V' which should hold the stop firm against the clamp. No need to try to match the 'V' outline. BobUK.

[@Blondihacks]

The 3D printed one was 90° and that’s part of why it didn’t work very well.