Precision Toolmaking Making an Edgefinder Part 2

[@carlmanchester5028]

My vote is for "Narwahl Edgefinder". Thanks Tom!

[@ThisOldTony]

always a pleasure to see SG coverage. have to admit it looked like you were going to fowl the wheel guard from where i was standing. edge of my seat! looking forward to the rest.

[@seanflanagan5674]

+This Old Tony My "complaint" as well -- I hated not having a view of the gap between fixture and wheel, and puckered extremely in this vid when he ran the wheel in so close in the last setup! (hmm... now it occurs to me that he must have been grinning like a mean cat, knowing it would freak folks out!)

[@jazzyjay1150]

Strange breed you folk are.

[@Hardturnin]

I have no problems with your process progression at all. I am totally focused upon both part one and part two. I like the reach of the edge finder and find this a very interesting and entertaining project. You hit the baseball out for a home run. I have never purchases mini V blocks (or Wee Blocks) and I think it will be a wise investment for me. I like your whirly gig spinner and was not surprised at all that you prepped the wheel before starting. Very Pro as usual Tom. I liked your attention to the screw so no mark was made. I like Brass shim bent to fit and slide yet copper would be my smart choice as I love the stuff.

[@bcbloc02]

Interesting project. I am interested to see how you maintain the faces being square to the shank when lapping.

[@duobob]

+bcbloc02 +1. That will be interesting.

[@TheMetalButcher]

+bcbloc02 Same here. A sort of floating v-block that works similar to that surface comparator shown in the surface plate video is what I'm expecting.

[@KnolltopFarms]

A "Baby Gronk" sounds like something Pebbles from the Flintstones would order at the drive in after Fred orders his Brontosaurus Burger :) Thanks for the show, Aloha...Chuck

[@fpoastro]

Probably a goofy question but during the making process what causes a part (the small part in the video) to become slightly magnetized? Is it just coming in contact with magnetic tools/items in the shop? Something do do with the machining? And assuming its just the conventional rub against a magnet to de-magnetize?

[@johnbazaar8440]

I was betting that indexer was going to get an electric motor. Interesting clamp arrangement, both part to indexer and indexer to table. Thanks, John

[@jeffmoss26]

great work as always Tom!

[@MrShobar]

Nice work. Don Bailey would approve...

[@OUMagMan]

Excellent! Sure hope you're doing a bit on the "lapping" as well - I haven't lapped anything (we're talking about metal and machines now) since the old Briggs & Tecumseh mower's valve job days! Thanks! Jim@MidOhio

[@RichardHeadGaming]

That mirror looks like it gives the perfect vantage point without having your face in danger.

[@coldformer1]

another great vidjeo as ave would say cant wait to see the spring connection

[@AmateurRedneckWorkshop]

Great project. Thanks for the video.

[@indestructibleinsertman2168]

Did you ever have any issues with generating heat on the small parts during grinding? Just curious if you had to let cool in between passes so as not to risk wrecking the heat treatment? Thanks for all the content you bring to us amateurs!

[@outsidescrewball]

Nice! Enjoyed

[@886014]

Very cool little project. I do think sometimes it's easier to set up on the surface plate and slide the whole shebang on to the chuck, but obviously sometimes that's not possible.

[@brettwatty101]

Cool work mate. It would be awesome if you hoked up a stepper motor to your setup.

[@svenp6504]

It seems to me the narrow, center part of the 'pecker' should have been ground first so that you'd have that true cylinder to mount/remount in the v block. It could have been warped from the heat treat which would end up giving you runout at the tip, no?

[@oxtoolco]

+svenp Hi Sven, You are correct that if it was badly warped it would be a problem. The tool is self proving when you test it as a system in the end. Stay tuned. Thanks for the comment. Cheers, Tom

[@Ropetangler]

+oxtoolco I must say that I was thinking on the same lines as Sven, I couldn't see how you could have decent co-axial alignment between the ends, having ground the shoulder end first. I look forward to your explanation and demonstration as to how you get it done. Thanks again for all your great video work Tom, while I always give your episodes a like, I don't always say thanks for your considerable effort, so a very big THANK YOU from Australia, Cheers, RT

[@oxtoolco]

+Rope Tangler The center section was turned round with the other two diameters. It was not significantly off even after heat treatment. Remember this is a visual tool. Consistent jump is what we care about here not absolute geometry. Thanks for the comment. Cheers, Tom

[@phooesnax]

Cool project. I had to laugh at the drill though. All those great industrial tools and there we are with a drill that looks more like a kids sneaker:-0) Funny how design used to be just what is needed and now it looks like space ship. Great work Tom! Thank you

[@KingNast]

Yeah, what is it with these designs? Some Hitachi chop saws would look right at home on the set of Alien.

[@Jccarlton1400]

What's the advantage of using V blocks rather than collets?

[@EtherTrace]

Any idea how significant the concentricity error between the shaft and the contact tip would have to be before it would cause the edge finder to give a faulty reading? Just something I was thinking about given the features that you can't grind with this setup. Got me wondering about how a lack of mass balance around the axis of rotation could affect the function.

[@Barefoot3us]

Hi Tom, I'm wondering there must not be much pressure between the grinding wheel and the shaft? Also your assortment of smaller or miniature tools for holding small shafts is very impressive I've never seen the miniature V-Blocks. I sure have enjoyed these two videos about your edge finder. I guess there will be a part 3 to finish up? Thank you, Jeff

[@oxtoolco]

+Jeff Bernstein Hey Jeff, Got to go small since Adam has the big stuff well covered. Should be four parts to this. Thanks for the comment. Cheers, Tom

[@Barefoot3us]

+oxtoolco Tom, You're right when it comes to Adam having the big stuff covered!

[@wupme]

+Jeff Bernstein well Adam is doing the Abom sized stuff :)

[@shawnmrfixitlee6478]

I'm like'en this tool build Tom .. Good work man ! Thumbs up..

[@CMAenergy]

Personally I would have lubricated the sides on your clamping system as well the adjustment screws, You probably would have been able to adjust much closer with your dial indicator,

[@Iceberg86300]

And rotate the part in the opposite direction so the surface being indicated is moving away from the indicator. (Or keep the rotation & indicate from the bottom if using a push/pull indicator (can't remember the technical term, but specs would be something like .005" - 0 - .005")) I'd actually love to see a comparison b/c while "always set up with the friction vector pointed away from the indicator/stylus" was repeated ad nauseam, I've never seen a real world demonstration looking at the variance in accuracy/precision. It's simply one of those things that has always been trusted b/c the reasoning was very sound. 🤷‍♂️

[@poozandweeez]

when are you getting your new cylindrical grinder up and running???

[@stuarthardy4626]

Tom Again very interesting video But how do you test to see if the part is true cylinder , using a Mike will not test for that ? I know I am being pedantic but my inquiring mind would like to know Stuart

[@oxtoolco]

+Stuart Hardy Hey Stuart, It doesn't really matter in this case. Its not a cylindrical journal running in a bore. Its a visual tool. As long as the two diameters are the same and concentric the tool will work. The face to the cylindrical part is what is important and will come out in the testing. Thanks for the comment. Cheers, Tom

[@stuarthardy4626]

+oxtoolco Tom thanks for the reply , maybe you could cover the measurement aspect in a future video Stuart

[@MostFolkCallMeOrangeJoe]

+oxtoolco Just out of curiosity, is there a method for checking the roundness of a part using more basic metrology equipment, preferably something self verifying. The only way I know of is with a Talyrond.

[@dlstanf2]

between you operating the x-axis & your drill having the "weeble wobbles" you got my vertigo going. Too much action at one time. The drill wobble doesn't affect the grind?

[@patricksworkshop6010]

dlstanf2 no because the spindle is in “perfect” bearings the wobble is no problem

[@douro20]

I'd imagine that Suburban sine plate cost almost as much as the #1 Harig Grind-All.

[@gordoneckler4537]

You didn't show how you indicated the small end of the little piece with the larger end of that piece in the Vee Block!!

[@Lawnmowerman02346]

Am I missing something ? Ware are the pins and holes for the springs ?

[@c5h5nino24]

Another great video! Would you be willing to post prints of your design? I would love to make one!

[@mikeadrover5173]

Thanks Tom I always Enjoy your vids! ~M~

[@raincoast2396]

A master tool maker at the top of his game, right down to the "baby gronk"! lol

[@jomgelborn]

My surface grinder doesn't make much noise. Did you buy yours at Harbor Freight?

[@oxtoolco]

+John Welden Hey John, You got that right. Motor bearings have had it. Going to send the whole spindle in for rebuild here pretty soon. It drives me nuts as well. Thanks for the comment. Cheers, Tom

[@Rocky1234732]

Great project. Thanks

[@Jpmhp2394]

does anyone remember where Tom got that custom leather apron and a link or contact to the website...........

[@alepadavano227]

I was very impressed with this one. Let others remark with more authority about your machining,which even I as a rank amateur find extraordinary. your precision alone warrants that declaration. Nevertheless from an artsfartsy point of view the entire video was expertly cropped as well as the lighting. Because much of machining has to be done with an deafness aimed towards symmetry up t stands to reason that this inclination gives you hands up in your vid work. if in was still able to work I would immediately see a fellow compatriot in photography. Booth and you have I think a artists inclination. I spent a lot of time evaluating students an d guiding them as best I could I would have been honored to have both or either of you in this respect. I know go away Al, seeya Oxboy

[@billdlv]

Looks good Tom, a little hard to hear you over the grinder sometimes. May just be my device...

[@wupme]

+Bill De La Vega nah its even on my studio headphones. He should try to lower that noise. Maybe using noise profiling (if his editing software supports that) to lower it to a volume so we can hear him better.

[@codyrasberry4132]

I'm not doubting your judgment by any means but are those indexers made to be continuously rotated?

[@coldformer1]

+Cody Rasberry no 1 rpm every other tuesday

[@codyrasberry4132]

+Jerry Schram haha that's funny Tom. Oh wait... That's right you're not Tom.

[@coldformer1]

+Cody Rasberryi am not Tom but i did stay at a holiday inn last night

[@codyrasberry4132]

+Jerry Schram that's amazing. Tell it again.

[@powaybob]

+Cody Rasberry To answer your question. Yes, that is exactly what those indexers/spinners are made for.

[@robertkutz]

nice work.

[@johngermain3535]

nice getting close. to use.

[@larrysperling8801]

really like this surface grinder work. your pieces seemed to have maintained a high degree of concentricity after heat treating. is there a secret to this.

[@oxtoolco]

+larry sperling Hi Larry, This was 52100 steel which is pretty stable in heat treat. Proper quench rate and medium is one secret. In other words don't use old motor oil or transmission fluid. Thanks for the comment. Cheers, Tom

[@ikbendusan]

+oxtoolco what about new motor oil

[@pierresgarage2687]

+Dušan Pešić  If you really want to use something other than specialized oil, use canola or olive oil before motor oil... ;) Also the way you introduce the part in oil will determine most of the distortion you may get...

[@ikbendusan]

interesting, thank you

[@RobertPerrigoOkiechopper]

Thumbs up

[@vladromano5599]

Vé avec étrier de bridage - that`s the french designation :)

[@dennyskerb4992]

The angle of the dangle was deceiving with camera position

[@jeffsilence7785]

That's one annoying whine coming off that grinder !!

[@IlhanNegis]

that precision, almost pornographic

[@bobengelhardt856]

10:44

[@brianhostak3961]

Very interesting Tom. I 'm going try the cylinder grind.Always something new from you. Keep up the great videos.Thank you.

[@McFingal]

How does this get three thumbs down? Someone tell me what he did wrong so I know what I'm looking at. Because I didn't see anything done incorrectly.

[@davidengland4731]

+The Texas Gun Guy there's always some ass.

[@juanrivero8]

+The Texas Gun Guy Either a professional troll or some teenager being destructive.

[@codyrasberry4132]

Bunch of jealous guys don't know a pro when they see one if I was guessing.

[@wupme]

+The Texas Gun Guy every person has a right to their opinion, and the right for it to be different than yours. For example they might dislike that you almost can't hear him because of the grinders noise. +DAVID ENGLAND Juan Rivero Cody Rasberry So everybody with a different opinion than you guys has to be either an ass, a troll, destructive teenager or somebody jelly?

[@McFingal]

+djteac Hey if that's the issue then tell him so he can correct the error. Just giving someone a thumbs down without the reason why is of no help to anyone. I used to have a saying in the army, (If you see me doing something so stupid that it might cost me my life or the lives of others stop me) That saying applied to everyone, from private to general. Life is to short to allow egos and stupidity to get in the way and end it.

[@Opinionator52]

Looking good Tom,,, Thanks for sharing this,,, it is a handy tool! :o) O,,,

[@twobob]

Part1 private PePeHands. ;)

[@macgyver15147]

Too much work. You will never hear me complain about spending $50 for a good one again.

[@johncarey9149]

Sorry Tom, I had to put a dislike on this video. The sound levels are dreadful, with the howling wine of the grinder being such that if I turned the volume down on the TV to a tolerable level, I couldn't hear what you were saying. I sincerely hope that you wear hearing protection when you are working with these machines ... :-)

[@sheikyerbouti83]

That grinding setup is the absolute definition of dodgey. You should really change the name of the video to "cleverly making do" because it's not within shouting distance of being precision toolmaking/