Hydraulically Testing Pull-Out Force | Strongest Vise Jaw

I couldn't find friction ratings of jaw materials, so I experimented with copper, aluminum and steel. Steel came out on top, withstanding roughly 1200lbs of pull out on our aluminum coupon. I don't know why steel is best, but I intend to find out. Thank you for helping me make these VJOs. Patrons get early access / ave

[@crazyguy32100]

In my experience the amount of force to pop something out of a vice is about 1ft/lb less then the amount of force needed to crack loose the fastener you are working on.

[@MyLonewolf25]

crazyguy32100 gots work with some shock loading then boyo

[@joejane9977]

Or break the back side of the vise off

[@jumpinjojo]

crazyguy32100 Than*

[@jackharmon4198]

crazyguy32100 that’s so true 😂

[@colsoncustoms8994]

Yep broke the poop out of mine in no time @@joejane9977

[@InsanoBinLooney]

"Halal on the farm, Haram in the barn." -Ave 2019

[@jayjayspider9240]

😂

[@AD7ZJ]

I think this is hilarious.

[@Kejnao]

Yeah, that generated a legit lol.

[@aceof8S]

One of his best, I oughtta say

[@simonrogers7841]

And de-monetized!

[@danielbuck85]

Welshman checking in - you have to tuck their back legs into your wellies!

[@arduinoversusevil2025]

Thanks! The velcro gloves aren't effective on goat hide. Now to find a cliff...

[@Ben-kd5wn]

There’s a reason sheep with bad legs, are always more expensive at farm auctions around here

[@sparmedic782]

Practice safe procreating. Paint an X on the back of the ones that kick.

[@Tuck-Shop]

Welshman here too. How does a Welshman find a sheep in long grass? Attractive.

[@Growis83]

You think the Welsh are bad, the scots have gone one further and wear skirts so they don't scare the sheep with the noise of undoing a zip!

[@gillbates999]

Reminds me of the old penguin joke where it took its car in to the shop after a breakdown, and while waiting for the repair went to have some ice cream next door, but not having hands to hold a spoon made a bit of a mess of it...goes back to the shop and the mechanic says, looks like you blew a seal...replies the penguin, oh no, that's just ice cream...

[@umbra1016]

0:50 Me - "What's that sound in the background? Sounds like an alarm." 1:22 *spews coffee through nose from laughing*

[@eldestgruff]

I vaguely recall from a mineralogy class I took a few years ago that copper's crystal structure isn't very resilient to forces like that. The top few layers of molecules can slide like Molybdenum or Graphite just not as easily. I'd just assume anything that can be used as lube has a bad crystal structure for holding things in place.

[@moorecha]

For some reason watching this during the testing I couldn't help but put on the safety squints.

[@arduinoversusevil2025]

I'll admit, I had the no feeling at first too.

[@stevenkelby2169]

Always trust your in stinks.

[@moorecha]

@@stevenkelby2169 if you can't trust your stinks, what can you trust??!?

[@scottlandmcc]

As a millwright I resemble that millwrong comment! Always great vids AvE!

[@marksmith6837]

In the aviation world it's two types of pilots with retractable landing gear, those that have landed with the wheels up and those that are going to.

[@shawngoldsberry9436]

Mark Smith like concrete ,2 kinds cracked and gonna cracked

[@peterhoffman4288]

A couple of observations. The movable jaw of those vises have about .005 clearance between the bed and the jaw itself, allowing them to float out of parallel and align to anomalies in the workpiece. The side-effect is that when you place the workpiece off center, the force isn't equal side-to-side across the jaw and it kicks the movable jaw out of parallel from the fixed jaw. Your part is slid to the right, and has the least clamping pressure there. Your cylinder is also applying force at the far right. I'm curious how much better it would hold if everything was on the centerline of the vise bed. Secondly, in addition to the co-efficient of friction, there also is something to be said for the changes in the modulus of elasticity of the different materials (especially where the copper extends above the back-up support of master jaws). Great vidjeo, though!

[@killerguppy2988]

Yet another great video demonstrating the practical quackery that it don't take much to make things go to heck right quick. I'd love to see how something like MiteeBites and Talons stack up against straight up flat sided jaws.

[@Strothy2]

nothing creates a code brown more quickly, than a small part getting ripped out by an endmill and flung with lightspeed right into the handy part catcher build in every machine :D even better clamping a pipe without inner support with a 3 yaw and using a dull insert... oh the show is glorious...

[@Strothy2]

​@@fascistpedant758 yeah like that... :D my coworker once thought drilling and turning an ID (was like a M16 with a deep countersink) on a 130x500mm overhang (like 4/5"x19/20" ish) should go fine... needless to say it didn't... Slowly he let it turn he said... It worked fine the LAST time he did it, he said... yeah no... took us a good day to get the fracking spindle back straight -_-

[@w13rdguy]

Non-linear, like my car's gas guage?

[@TWX1138]

You joke, but my '95 Impala's gauge reads crazy high, pegged a hundred miles into the tank, more than half at 200 miles, only starts to really fall after 250 miles. There's a fix, install a resistor inline, but if one uses the trip odometer then it doesn't matter much.

[@detectingsouthflorida9925]

Tank narrows put towards the bottom. Less gas in bottom half.

[@detectingsouthflorida9925]

One would think it could but most likely not. I'm sure its still read via a floater in the tank. These days a horse and buggy will run 25,000+ and you would still get better gas mileage, so it does not suprise me unfortunately.

[@dankerthanclanker]

MK1 MR2 owner here - below a quarter tank, my fuel gauge is actually more akin to a stopwatch.

[@DavidIngram]

I’ll be honest. My pull-out force is significant.

[@emeltea33]

Are you saying you don't use the wonderful self made lube?

[@stevenbiars6212]

Not I. I'm in too deep at this point. *cue the rimshot*

[@daviddroescher]

@@DruFishing na its the one found in the posterior of the jet engine

[@hit9inthehead]

I thought mine was too. Nine months later, I was proven wrong in the best way possible. A baby boy. I wish this dude was a teacher in his school.

[@philipcaplan6897]

How many kids

[@tjfritts9013]

I can't have been the only one that, even through the interweb screens, was leaning back when the pressure was building to push the aluminium block out of the vise...Great video, and I'd have been hiding outside and peeking 'round the corner.

[@Sqtgdog]

Could the test results be showing deflection of the material of the jaws before the co-efficient of friction is reached? This could explain why the steel worked better. Another test with a larger 'bite' area might prove more reliable for just a friction test.

[@connorfrazee8272]

I looked up a bending force equation and it seems very possible. I only estimated the values for the metals and surface area though, so I don't know for sure

[@tiporari]

Thought the same. Especially with Al, and measuring center deflection in thousandths

[@motoboggin2619]

and some slack in the vice/jaws in the vertical axis

[@johnbarron4265]

Not a chance. The jaws are too thin and are supported over too large an area for a measly 500-1000 lbs to generate any kind of measurable deflection.

[@johnbarron4265]

@@connorfrazee8272 Only there is no bending. The jaws are supported over their entire length.

[@peteb.7135]

There are a few things that apply more grip to the part while in a vise like sitting it lower in the vise. You'd be suprised how much deflection Kurt vises have at their max torque. Another would be to apply friction in the form of recessed grippers. I've made a thin horiontal relief line across the entire gripping surface before. this works well without marking the part.

[@hedonisticzen]

Thanks for being so transparent with your scientific method shortcomings! At least you explain how the bleeding test was done and why. Good luck getting that from a manufacturer.

[@outsidescrewball]

enjoyed the discussion/demonstration.....you have talked me into increasing my vice clamping routine

[@Cazness]

Got a new apprentance last week, nice Chinese guy. Found from HR that I cant use the term safety squints any more.

[@lifuranph.d.9440]

@@JustBecause7754 NO !

[@priitmolder6475]

Copper does not age harden, so it is the softest and most plastic of the three. Aluminum age hardens and thus is a smidge more stable. Steel is...well steel. Combine all that with jaw climb and you may be loosing effective surface area.

[@stevenlanders4919]

Cnc 101 at the community college. We write our first past as a class. Runs great in master cam. Go into shop brand new haas never been choouched. Load up and green button. First pass is facing with 2 5/16 job. Rapid traverse about an inch into brand new kurt vice. Some real deep purple chips and a dive to the catsup button. Learned to set zeros. But that vice will be forever marked.

[@bh5097]

I believe Kurt vices are ground at an angle so that when using steel ground jaws there is more grip at the top of the jaw. Like a dovetail as an exaggerated example.

[@bradhaines3142]

this may be one of your best videos ever. this is educational and HILARIOUS

[@recoverthis602]

Over clamping will also reduce your clamping force. You start to bow the material and shrink the contact face > t. 15yr cnc guy

[@steelwheelsminnesota]

The transition of forces during drill break-through is the exact reason that drills ground for aluminum have a smaller point angle. Even when the part stays in the vise the transition can break the drill flutes right off the shank. Having the smaller angle increases transition time and reduces the shock to the tool. You know where the bottom of the hole is in vise work, so it pays to program a feed rate reduction when you're cutting soft materials.

[@azy6868]

Regarding the slip with Aluminium on Aluminium, verses Aluminium on Steel. The microscopic imperfections on the surface of the steel may provide a keying action into the softer aluminium. Where as aluminium on aluminium, the imperfections may deform and burnish both the surfaces, easing the slip. Just a thought.

[@jamesmiddleton6464]

Fantastic demonstration of why wood workers use hold downs as well as vices. I would thunk cnc with all the lubrication flying about could have the same need frim time to time. Just cranking the vice tighter will just not be enough sometimes.

[@brandonsimmons2942]

I came here because I'm looking into refurbishing a vice. Although this wasnt the advice I was looking for, it's probably the best I've ever been given.

[@Mtaalas]

You have to remember how the workpiece can warp and bend when you tighten it to a vice on top of parallels... all the way to the click might not be the best course of action in every case :D

[@LoneWolfZ]

you have a bit of shmoo on the lower right of the lens. also: you blew a seal? I didn't even know you lived that far north!

[@wolvenar]

LMAO.. Oh crap.. I just woke up the Mrs because of my laughing so hard.. /me ducks....

[@arnienonymous4458]

You now need the totem of Steve the Seagull Manager. Steve the Seagull Manager is known for swooping in unannounced, squawking at high volume for indefinite periods of time, crapping on everything, and then flying off after not resolving anything.

[@jake3523]

Mine eats all the fries in the joint first

[@3dprint-tech787]

Your editing has become really good! Makes the good content even more enjoyable! Keep it up!

[@JediDachshund]

I'll need some inconel soft jaws, ya know for comparison

[@RodRosenberg]

"soft"

[@StevenAndrews]

You need to mosey on over to your scanning electron microscope in the NW corner of the shop. I bet you'll find the granular structure of the materials and the surface finish have some impact here. Either that, or copper deforms on compression and can't hold any spring that the steel can. It also could be your lack of beer in the shop.

[@nicholasouellette582]

I've loved watching the evolution of these gloves over the time

[@Compgeek86]

1:35 upon further rumination, we've decided to stick with the ruminants

[@philmarek3272]

I caught in there that you know my old pal, Ray Oliver. Haven't heard from him since I visited Maple Ridge in 1998. That was a fun trip. Don't remember much beyond that, however.

[@problemwithauthority]

After decades as a machinist, I can say that if I want to hold something tight in a milling vise. I used paper. Use parallels to space the part to the needed height, and between the vise jaws and the work piece, use paper. However on a CNC, just make smaller passes, and let the machine to the work.

[@Zenarisu]

Manufacturer: This is the strongest vise that ever made in the world AvE: hold my beer gape goat

[@moonasha]

17:50 could it be because of some sort of galvanic action? when you put steel and aluminum together weird shit happens chemically

[@GeorgeTsiros]

11:30 instruments are supposed to be calibrated so that the nonlinearities in the mechanism do *not* affect the measurement. This one's scale appears linear (ie the angle between the two consecutive lowest indications is equal to the angle between the two highest) so there are two cases: 1) the spring is so linear, so well behaved, that the error is neglicible 2) the scale is not calibrated.

[@WogChilli]

I’ve learned so much from AvE’ vidjeos. Best channel.

[@adrianscarlett]

Can you convert that to exatonnes/parsec, it wasn't clear. Thanks.

[@sp1nrx]

I was expecting the convertion to drams/square furlong.

[@tomast9034]

@@sp1nrx.... elbows per decade ? maybe... :D

[@Indevitable]

Did he just reference Larry Enticer when he said he was just going to send it?

[@matthewperlman3356]

I seem to remember that coefficient of friction changes with the applied psi ( or whatever measurement system you prefer) to the contact area. that is to say that more squeeze does not linearly equate to the increased friction. Example Teflon gets slipperier as applied pressure increases; this could explain the unexpected results on steel vs aluminum.

[@MrPafleouf]

"he identifies as a goat" ... LMAO

[@daviddroescher]

LMAO too but hes really just a 2nd cousin

[@warrenzonator]

Lift up a block resting on another block, and the angle just before it starts sliding is your μ_fs. Tan(x)=μ_fs, where x is rad/2π or °/360. That won't account for the deformation of the surface texture from clamping, but it'd be cool to see how close the estimate could be, or how much it's affected

[@RalphBrandsma]

"The las time this gauge was calibrated was uhhhhhh, Never." that got me good for some reason 6:40

[@daemonelectricity]

"The local trader assured me she'd be a fine and faithful pocket pu-" .... and demonetized.

[@vaporainwaves]

I choked myself with food. Also the halal and barn part... I guess I need that pussy now.

[@OptimusN06]

If you need pull out expert for future endeavors let me know my going rate is cheap.

[@67dueceman]

@Joe Briggs Jr you mean that bit made your hole weak

[@rootvalue]

As a boy of a Palestinian man, your Haram joke fucking killed me. Thank you for your service.

[@mattymcsplatty5440]

i really like the look of the tool path patterns, maybe some cool man art can be made using these patterns? i would really love to see an attempt at it.

[@loganolson2791]

The coefficient of friction may be higher on aluminum on aluminum, however the clamping force of the vise tends to plasticly deflect the seating surfacing of the jaws away from each other reducing the surface area thus the holding force. While the steel jaws may have a lower coefficient of friction they are less likely to deflect due to the material strength and provide optimal surface area on clamped parts. Cheers

[@TheEternalHermit]

I thought the point of the copper jaws was more about being gentle to the surface of the work than having more holding strength.

[@joncraw29]

I think the coefficient of friction applies to the contact area of the aluminum to the copper jaws. The greater the contact area, the greater the effect the coefficient of friction will have on the force required to move one material against the other.

[@farmguy2400]

Vice tightening instructions: Once you get to torque level "click" keep tightening to "Abomb79" level.

[@Malice11029]

a part offset in jaws will come out easier, keeping it right in the middle is ideal sometimes i find holding on too little an area can cause parts to come out too however that can be a symptom of sock surfaces not being square.

[@bwilliams00111]

Put an indicator on the top of The Pusher jaw. You will see it lift as you tighten it. So your part is already being pushed out just by tightening it. you can tighten the Allen screw in the middle of The Pusher jaw, it helps a little.

[@iandegraff3472]

Gonna watch the whole thing, but a few quick thoughts just from reading the description- 1. What grips what what the best material-wise? Does ferrous grip ferrous better than non-ferrous and perhaps, bench-vice-a-versa? 2. What about surface finish? What happens if some shiny ferrous jaws clamp down on some shiny ferrous surfaces? Do they act like gauge blocks? What if some gnarly, knurly ferrous jaws clamp down on some aluminum? Do they just dig in, or dig in and also weaken it structurally?

[@vonmiekka]

Actual CNC machinist here. The chip pressures / machining forces are usually towards the clamps / parallels, especially when drilling. Most modern carbide insert mill heads insert a small force towards the the piece, so they are not pulling the work piece form the jaws. Old school HSS end mills (and solid carbide end mills) still tend to pull the work piece up, but the chip forces are super low on those. That all being said, I was surprised about the results on how small of a force can displace the workpiece if the force is straight up.

[@aredington]

I'd love to see another vijeo where you examine more dimensions of the space: - What is the holding force for copper on a copper workpiece? Aluminum on a copper workpiece, etc. I reckon there's 6 more trials here to examine the other combinations. - What is the holding force when the vice is torque down to 60 ft-lb? 80 ft-lb?

[@Rabbit66-96]

Oh, wrong pull out force.

[@ericspda]

When possible, use something that digs into the part like a mitee bite talon grip. You will most likely never pull a part out of those. All you need is 4 on a larger part, and you will have no worries of the part moving on you even if your stalling the spindle. They leave a mark on the side of the part though. Parts come out of vises all the time with smooth jaws. Its super difficult to get any real feedback on a VMC, you have no idea the forces the part is being subjected to until the thing explodes out of the vise at 1276m/s and shatters the window your face is an inch away from.

[@KBLIZZ333]

I was just about to walk out the door and head into work when I got the notification hahaha work's gonna have to wait !!

[@WeighedWilson]

Might I suggest moving the kurt vice closer to the operator on the table. Two reasons: less reaching in and tweaking your back and your vice handle can spin 360 degrees for faster jaw adjustment.

[@arduinoversusevil2025]

but but it's already squared up.

[@4e616d65]

Oh, you got it set up perfectly? Break it down and set up this one piece.

[@DataStorm1]

with the 2200 pounds "measured" with the thing, it was 1100 front and 1100 back.... hence its around 500 pounds to push it out. (only one side has to give)

[@Treveliian]

Correct me if im wrong, but as i understand it... if your goal is to clamp a part with as much force as possible. one side of the equation needs to have a density/hardness factor greater than the other. either the part being held or the jaws need to be much harder than the other. So for example if i want to hold a part and not damage it, i need to use a softer metal than the part for the jaws of the clamp. It will limit your clamping force because one side will collapse under the pressure. If you want to hold the part and not be concerned with damage. the jaws need to be as hard a material as possible and the part being clamped needs to be a softer material. Aluminum clamping aluminum. you will be limited to the overall hardness of the material because as you apply more force both jaws and part will crush and only so much force will ever be applied. a force equal to the hardness of aluminum in this case.

[@BuiltbyD]

Copper and aluminum vise plate mods gonna be cutting them down to sit workpiece flush with top of steel vise? Looked like at least the copper one bent at the top and lost a lotta friction??

[@night2night3]

"Ruminating" ha you earned a chuckle from me.

[@TheCrust333]

Good video as always a pleasure to watch. One thing came to my mind about a difference between your selfmade softjaws and the stock ones. The stock steel ones are ground in a 90° angle to the pullout out force. The tiny grooves of the ground surface help to keep the workpiece in place. Especially in case of Aluminium where the surface can press into the material like teeth. A Milled surface is wavy so it has many tiny radiusses. Those round shapes are not as good in giving extra Grip as the grooves. If you take mild steel as a workpiece, the same test could tell a very different story. In case of steel the steel jaws would not grip as good as the aluminium or copper. The combination of the materials to clamp and those to clamp with are a huge factor in this test.

[@fredygump5578]

Watching this channel, I'm always learning things I didn't know...and often it has nothing to do with the supposed subject of the vid'jeo.

[@TeeDubzz]

Pretty sure the highest pull-out force is caused by "BE MY BABY DADDY"

[@mr06fusionify]

At least I was not the only one thinking about that.

[@bansheemania1692]

Flew out a 2nd story WINDOW When She said that, Jumped inda Ford and, "OUR BLESSED MOTHER OF ACCELERATION DON'T FAIL ME NOW"..

[@NNFaNRacing]

The aluminum jaws could have been deforming so they were no longer parallel and some small portion of the clamping force was also pushing out the piece out.

[@Max-mp7le]

Ave as an undergrad engineer I'd love to know what, if any, qualifications you have. You make some of my favourite videos on here and I just want to know if it just pure experience or any degrees because you are smarter than any lecturer I have.

[@omarbabovic5241]

Me thinks uncle bumblefack has industry experience.

[@TempoDrift1480]

It's that goat. It teaches him things. I've seent it.

[@keithjurena9319]

A vapor thin coating of rosin does wonders at raising the coefficient of friction. Really helps me release the schmoo ;)

[@torusbrane5629]

Repeatability is the key in figuring out this kinda stuff. I don’t know if I’m speaking alone here, but I like how you science the shiz outta this. Or at least it seems you have that kind of mind. And listening to how you synonymize common words to a 2.0. I wish everyone would talk like that. Keeps you on your toes. Imagine a foreign student trying to learn English by watching your videos. That’d be a hoot. P.S. Dianetics has always sounded like a form of calisthenics. Like a more intense Pilates. Maybe that’s what Hubbard should’ve done. He’d probably still be kickin. And maybe have some workout infomercials too.

[@BuiltbyD]

Well said friend

[@RSGarage-YouTube]

well the coefficients f friction can be tiny number, so the results that you are getting are just about right.

[@akukorhonen5182]

Spanks for vouching, pranks for touching. Keep your grip on the ice. P.S. Don't eat snow anyhow, it melts out by itself later with huskies or without.

[@gregfeneis609]

Don't overlook deflection. The steel jaw surface that contacts the work piece will likely remain flat to the work piece, whereas jaws of softer material may deflect as you increase the clamping force. Potentially, you could pre-emphasize to compensate for deflection, but you would always have to clamp to the right clamping force each time. I imagine surface finish matters a good bit too.

[@QlueDuPlessis]

Your soft-jaws look mildly polished. Your steel jaws have that brushed metal look that adds a smidgeon or two to the friction coefficient. Just a thought.

[@rockmonkey37]

Possible explanation for reduced force despite coefficient of friction: the small amount of aluminum/copper jaw proud of the work peice will deflect imperceptably. Put an indicator on the fixed jaw side and see if it's bending back? With the steel jaw, deflection is less (stronger material, nothing proud of the jaw). I wager the top of the soft jaws aren't exerting the same pressure on the part as the top of the steel jaw.

[@Parapooper13]

I wonder if surface finish has any effect

[@matthewf1979]

Partner, you know those Kurt vices split the tore que in and down, right?

[@interstellarsurfer]

That's just to keep your part from cocking over (deflecting) too much, under the strain of the vise. Makes for truer, more repeatable cuts - it doesn't effect the pull-out force.

[@markallen6433]

@@interstellarsurfer I think he's just saying that the rated clamping force may be accurate, but the total clamping force is at an angle down, so it won't read the full force on the x axis only, since some of it is in z direction

[@underourrock]

If you haven't already, use a dovetail cutter to cut out the bottom corner of the stepped jaw. Any end mill that you use to cut the jaws is going to have a slight radius there where the horizontal surface meets the vertical surface. The dovetail or keyway cutter running along the horizontal surface cutting ever so slightly into the corner will clear away that radius AND give you a relief area where a milled sharp edge will have some relief to go inside when being clamped. If you don't have that relief cut, then the act of clamping the part causes the part to shift upward ever so slightly getting a head start on popping up right out of the jaw. If you already have a relief cut into your jaws, I wouldn't be the least bit surprised that you already knew this. If you don't have that relief cut, please give it a try.

[@jameswarner7435]

Excellent suggestion, thank you for taking the time to share it. Hopefully it won't be lost among the colorful clutter of this here comment section.

[@underourrock]

@@jameswarner7435 thanks. Even if it is, it seems like at least someone appreciated it so it was well worth it. :)

[@steventhomson7531]

Don't suppose you could show how a reduction in surface area can effect the clamping force?

[@RedbeardPyro]

Love everything you do AvE

[@arduinoversusevil2025]

C'mon! That's impossible, what about the shitty stuff?

[@RedbeardPyro]

@@arduinoversusevil2025 Even the shit is pure gold. When your vids pop up everything comes to a halt and it must be watched. Rather watch you than any other.

[@jrayself]

@@arduinoversusevil2025 the shitty stuff is our favorite, Unc!

[@arduinoversusevil2025]

Aw shucks. You guys, you guys. I'll work on my shitposting. I promise to do worse.

[@iaov]

I'm retired and I love getting to hangout in uncle Aves shop!!

[@bengriffin4027]

Retesting the original (copper jaw) and second setup (aluminum jaw) after the final (steel jaw) could be telling. The ever increasing reqiired force could be due to some change in the test workpiece possibly occurring during the pushout. Sliding under compression could be altering the surface roughness and changing the hardness close to the test workpiece - jaw ok interface. Without retesting the earlier tested setups, the increase noted in force cannot be clearly attributed to only the different jaw material.

[@EricIrwin]

Not everything machined is aluminum. It would be interesting to see how those jaws work with holding different materials. Steel, stainless (304L?), aluminum, copper, brass, nylon, acetal, polycarbonate (or some subset of)

[@PhoenixRising2040]

Now this is a high deff scookum as all frig technicolor video

[@colsoncustoms8994]

I wonder of the peeling effect of having the force located on one side instead of centered under the part is factoring in.

[@keiy.4031]

You've invested a fair amount in tooling for your Haas there. Might as well go for the gusto and get set up with a set of OML SinterGrip jaws. They use a bunch of serrated face carbide inserts to bite into your work. It beats the extra operation of cutting dovetails into your stock and jaws for workholding, and will give you the grip factor you need.

[@drubradley8821]

Stainless steel jaws, and stainless steel block... I wonder about the gaulling effect of gripping... Or might it hold then let go with an explosive result???

[@freshben855]

No worries sailor, we've all "customized" vises. Quickest way to turn a flat endmill into a ball end.

[@juliannash3590]

The falsetto intro was perfection

[@thefunkosaurus]

I kinda wondered if Uncle B. was watching Hoonigan's "Garage Garage".

[@StormbringerMM]

The goat yelling in the background is fantastic

[@MikeHoncho1775]

"Don't be silly. I'm just gonna send it." Nice reference to the Enticer.

[@kolby4078]

the way those copper jaws are nested will weaken them when above the top of the vice and the more you tighten it the worse it is, even at almost no overhang Ive had issues before

[@varencilator]

Yeah, I reckon the jaws deform more near the edge and the piece also deforms more at its edge, creating a wedge like shape that tends to push pieces up and out. Softer materials would deform more and exasperate the wedge deforming. However, if the clamped pieces had more surface area contact with the jaws, there'd be less deformation and the friction of the materials might matter more.

[@Thefreakyfreek]

MY mind was not in that mood until I started reading comments so thank you

[@antalz]

I think the reason steel works better is because steel is stiffer. The jaws of the vise slightly deform when clamping on the part, and deform the other way when the part wants to go. Steel doesn't want to deform. As a preliminary test for this idea I suppose you could try to use a harder piece of steel, or harden a piece you've got?

[@htomerif]

Steel and aluminum amalgamate (or alloy or whatever) when put next to each other under high a lot of clamping. I wonder if at those forces you're not mostly measuring some metallurgic effects? It'd be interesting to reverse the jaw/workpiece materials and see if you get consistent results. It might also be possible that the vise geometry might be doing something uh.. "interesting". Trying the same material but different widths being pushed out might illuminate it.