ID and OD lapping simplified.

[@Dr_Xyzt]

Great video! It's always great to experience Don's tutelage and positive nature. So methodical, showing us a craft and taking care in our work. Lapped parts fit so nice. Fine actuators for machines that operate in cleanrooms manufacturing computer CPU's. A lot of those things fit essentially perfectly and they have control systems to monitor their precision further, to make parts 30 atoms across. Meanwhile, we take apart a hydraulic pump and marvel at how slick the fit is. It's humbling.

[@waynepetrevan]

I had a little problem job to do, I needed to size about a 100 .250" shafts to fit a bearing bore. The shafts were a 10th or two over, and I needed them to be a couple 10ths under and so I found this video. I am not unfamiliar with the concept of lapping but didn't know what equipent was out there. Watching this vid I learned about Americal Lap so I got in touch with them and bought the holder and some laps. Nice guy there, had a chat, and the laps came yesterday and they work perfect. This little rig works way better than I thought it would! Thanks Suburban Tool and American Lap.

[@SuburbanToolInc]

Great to hear, thank you for watching!

[@886014]

At the tolerances being discussed I would expect an on-size part to measure exactly the way this OD measured. It was being handled extensively from its ends during the video and the heat from doing so will cause the ends to expand. If it were left to properly stabilise on the comparator for a while it would most likely measure far closer across its length. I think this point should have been made in the video, as how much metal expands and moves is probably quite a surprise to viewers not used to working at this order of precision and will easily catch people out of they don't consider it properly.

[@artgoat]

Sweet. That's a nicer finish than most of the hydraulic valves I've taken apart!

[@McFingal]

Another fine video Don, I sure would like it if you made a video tour of your shop. You did that nice one of your parts suppliers. I think something like that would be great. Well thanks for sharing your time and your knowledge. Thank you.

[@Factory400]

These videos are so fantastic. Made a customer out of me!

[@SuperYellowsubmarin]

That's what i was looking for ! Much simpler than toolpost grinder for small OD adjustments ... Thanks

[@SuburbanToolInc]

Thank you for watching.

[@southjerseysound7340]

There's really something cool about how 2 perfectly lapped parts will fit together.But what I dont get is why people are afraid to do it or think they cant.It takes a bit of feel but once you get it you can make things incredibly precise.Last but not least is you dont have to go and buy the laps,they are super easy to make from scrap stock although for a commercial shop where they make a lot of one thing I see why he uses that one.But for myself I use a jig i have that can do rifling to cut the grooves inside to hold the compound and then I'll cut a slit like normal.

[@AtelierDBurgoyne]

Love the videos. Thanks for sharing. I swear that in the intro, Don is swinging in rythm with the tempo of the music! Daniel

[@guyward5137]

Great subject .Really never given it much thought I do see the importance of it in a good fitting part. Thank you for sharing. GW

[@SuburbanToolInc]

You're welcome, glad you were able to take something away from it. Thanks for watching!

[@joen2816]

Hi my name is Joe Navarro. I watched your video on squaring the head on a vertical mill like a Bridgeport. It was especially interesting to me because I have a product called "Spindle Square". Some say they can square the head within a Tenth so I appreciate your comments about the accuracy involved in tramming a manual mill.

[@jordantayaban7250]

nice vids. I also do internal and external lapping using diamond compounds, silicon carbide, aluminum oxide and some mixtures. with finish of 5Ra and .000050 roundness or better. I lap match assemblies of bushing and spool with clearance of .0001-.000130. It's a challenging job but I honed my skill to do it.

[@thorgodofthunder6056]

don, i love watching your instructional videos because you look so much like my grandpa harold. it us uncanny. i didnt get to know him well because he was a quiet stoic son of a finlander and he died when i was young. he would have been a terrible machinist. he only had one eye and he had parkinsons haha.

[@genkidama7385]

this is priceless first hand knowledge.

[@SuburbanToolInc]

Thank you.

[@Necrodoxious]

Fantastic videos and invaluable knowledge, this is a god send for an Mech E intern trying to learn shop techniques. Thanks!

[@SuburbanToolInc]

I'm glad I can pass along some knowledge. Thanks again for watching!

[@ckvasnic1]

Don, thanks for sharing your time and talent. Good show

[@fcarp1685]

I really enjoy these videos thank you for posting! It is interesting learning about different processes.

[@gheumann]

What is the clearance between the lap and the part? I'm assuming there has to be little room for the abrasive? And then, when the parts are done, how much bigger is the OD than the ID of the mating parts- one tenth? two tenths? I'm teaching myself to machine to this precision but not sure my digital micrometers are accurate enough to know what I'm actually accomplishing to a tenth. Thanks!

[@dustyribble]

Enjoy your videos! Can you offer any suggestions/insight for OD lapping a shaft up to a shoulder? Thanks for sharing.

[@binks166]

Don, thanks for your videos. Your demonstrations and explanations are great! I am a new subscriber and will be watching many of your previous videos. Best Regards, Harvey from Nebraska

[@pierresgarage2687]

Those parts come out great, is this method enough for air bearing precision? By the way no lunch bell today... ??? :)

[@jandrews377]

Id like to know this too. Watching Dan Gelbart's vid on his air bearing lathe, it sounds like his is 1micron. Hell knows how you achieve that with manual lapping.

[@panchovilla1486]

Thank you for the wonderful videos learning a lot thanks

[@jloyal728]

Exelente, thank you for this video. very informative and all well explained.

[@SuburbanToolInc]

Glad you enjoyed it!

[@theloneliness7128]

I dont know if the backgroundmusik was originaly from Midway USA but still cool stuff got a sub.

[@sumerkhan3928]

I am an student and the info that i have gained from the video is remarkable. Please suggest any tutorial or info video about honing. Many thanks

[@SuburbanToolInc]

We will keep it in mind. Thank you for watching.

[@johnbird8605]

Really interesting, great presentation!

[@celestesmith7985]

He hit that part twice and it ran perfect.

[@guillermominardi1211]

le mandó un saludo desde mar del plata argentina , muy buenos sus vídeos lastima que no se inglés para poder apreciarlo mejor, gracias!

[@Zaratustrov]

Sorry if i did't check all your videos. But do you have something like that explaining how to make fluted reamers in conditions more close to home shop, if small tool grinder availible? Heat treating is not a problem, but fluts grinding setup is interesting and also some old school tricks. ) Thanks a lot for your chanel and videos. I am still young but it's clear to me that an old art to be a machinist and toolmaker is dying in Europe and US. And i want to learn more from an old school until some last of mohicans still alive. )))

[@SuburbanToolInc]

We have some videos on reamers, but unfortunately none are focused on making reamers. Thanks again for tuning in!

[@MrEh5]

Your videos are great,i don't know why you don't get more views.

[@SuburbanToolInc]

+Bob Cartwright We have only been doing this for around a year. It takes time for people to find you on KZbin. Please share with your friends. That always helps. Thanks for watching.

[@southjerseysound7340]

Bob,I just said the same thing.I really hope they keep it up because the knowledge they share is very helpful and the Investment casting tour was awesome and one of the best on KZbin.

[@daviddouglas4200]

Thank you Sir ! --- er-- lapping wearing a WHITE shirt.......................

[@Sreejups1]

Sir...Good morning Lapping or honing, which one is the super finishing process for the cylinder bore? Pls reply...

[@SuburbanToolInc]

Lapping. Thank you for watching.

[@bcbloc02]

So far parts over 1-1/2" do you just figure the grinder will get you close enough on size to avoid lapping?

[@SuburbanToolInc]

+bcbloc02 Most of the time.

[@marinovskiv]

thank you for your video! can I ask - how common is it to lap a hard anodized aluminum part to size? I have a part with a -0.0004" od tolerance and +0.0004" id tolerance spec. (after hard anodize)

[@SuburbanToolInc]

can be done but dont go through the coating.

[@jkopel]

Thanks for this video! Is that a diamond compound you are using or is it some other type of abrasive?

[@SuburbanToolInc]

+Josh Kopel While we do use diamond compound on our automatic lapping machine , for this demonstration we are using white aluminum oxide lapping compound.

[@ronniescott5179]

Very good video.

[@SuburbanToolInc]

Thank you very much!

[@inayathpasha9405]

Hi, Can you Please Guide, How to lapp Carbide Bush ID

[@aryesegal1988]

Don, Thanks for sharing. A hobbyst question: Is there a limit to how precise things can be manufactured? I mean, could you manufacture a steel cube where each side is, say, 3 inches, with under a millionth tolerance? That is, each side is 3.000000 inch exactly. What about 9 decimal points? Is 12 decimal points possible? What are the limits of our manufacturing capabilities, precision-wise? Thanks, hope my question was clear :)

[@SuburbanToolInc]

+aryesegal1988 Anything is possible as long as it can be measured accurately.

[@pierresgarage2687]

+SuburbanTool Inc And time no object as well as budget... ;)

[@billgreathouse1913]

aryesegal1988 At some point you have to come to terms with the fact that you will be chasing a dimensions due to thermal expansion alone.

[@avocares]

The thermal expansion of steel is anywhere from 0.0000061 to 0.00000683 inches per inch per degree Fahrenheit. So lets take the median and call it 0.00000652. So if you had a block that had been machined to 3.000000 +/- 0.0000005 in a room at exactly 65 degrees Fahrenheit. When you picked it up to measure it you may increase the temperature by 1 degree, which would make that block 3.000019. The practical limits of dimensional accuracy are the ability to control variables like temperature. In addition to that there is flatness. A lab grade AA surface plate has a local area flatness (known as repeat reading) of +/-0.0000175. You would need something flatter than that to lap it on (not that you would lap on a surface plate) to have a surface flat enough to measure such dimensions.

[@aryesegal1988]

Thanks everyone who replied. Yup, variable control at such levels seem to be the most important/hard thing to achieve. Just reading Moore's book on mechanical accuracy, he speaks about these topics at length. Very interesting. :)

[@vijayr9875]

Nice work

[@jeetenzhurlollz8387]

excellent teacher

[@lukebaker8263]

This is so helpful, thanks.

[@pluckydingo709]

What is the surface roughness you get after such a process? I am looking to lap a 1.5mm diameter spindel to an Ra of 0.015um. Is this possible? Thanks for your instructional video.

[@SuburbanToolInc]

It should be possible

[@Sketch1994]

Is there a way to ID lap a shallow step to a shoulder without a relief groove?

[@albion2742]

Don,So what micro finish did you get on the part. Just asking as I used to grind to 2-4 micro. do you do any honing.

[@SmeeUncleJoe]

where do you buy the tools ? Recommended lapping compound ?

[@nikolaradakovic5050]

what mechanism makes lap master to contract evenly on a shaft?

[@EverettWilson]

Don, where do you get the compound you were using? I had done trouble finding small batches.

[@martybadboy]

firsts! thanks for the upload, Don.

[@hasanabdullah1711]

Thanks for sharing, sir..

[@SuburbanToolInc]

You're welcome, thanks for watching!

[@SmeeUncleJoe]

Does anyone know where he is getting his tools from ?

[@egx161]

Do you make the lapping tools? There's a bit of chicken/egg syndrome going on. Don't you need a lap to make a lap? Where does it start? Thanks

[@mackk123]

Pop a hole in a bushing with slices on it to the size of the shaft its somewhat of a self trueing process

[@MuhammadAfzal-jm6cw]

Good 👍

[@duobob]

Thanks!

[@simeonjohnson9117]

WHAT DOES OD AND ID MEAN THE

[@mackk123]

Inner Diameter and Outer Diameter id od

[@Landrew0]

Don Bailey would eat Keith Rucker for lunch.

[@kevenlee6862]

Two taps, there we go i think he did it before

[@bertrandlabelle3869]

what is the OD lap bushing made out of

[@SuburbanToolInc]

+Bertrand Labelle I'd love to answer your question but I'm not quite sure what you're asking. Are you referring to the ID lap we are using to lap the OD of the part?

[@bertrandlabelle3869]

Yes the ID bushing to lap the OD of the part. Would that be plain tool steel to interac with the 1200 grit compound. Or perhaps copper. Thanks

[@SuburbanToolInc]

+Bertrand Labelle Thanks for clarification. The lap is made out of cast iron.

[@bertrandlabelle3869]

ok thanks

[@priyaranjanshirvastw456]

hgfho

[@s.vanniaraj2992]

What is the Lapping paste name

[@SuburbanToolInc]

United States Products (USP).

[@artemdavinci]

Very very much abrasive paste! Wipe with the solvent should be! It is necessary to protect the base frame from the ingress of abrasive!

[@ferdirunge4510]

lapping is better with petrolium as oil :)

[@MrJackanapes57]

And not a speck of dirt on that white shirt.

[@aevangel1]

"but a rag could be dangerous" - while wearing a ring and operating machinery. - Facepalm.

[@SuburbanToolInc]

Right you are.

[@chrisstephens6673]

Hi Don, as usual a good and informative video. On the subject of lapping, have you seen Dan Gelbart's take on the subject? kzbin.info/www/bejne/qXfVh5elhM2oZ7M I can't say anything about comparing methods but his machine is fascinating.