Roller Burnishing

[@Homestead_Adjacent]

Excellent video. Didn't fall asleep even once. Previous commenter needs a coffee

[@stacysimon8864]

Nice video Sir! I have been a machinist for for 20+ years. I have always heard of burnishing, never looked into it until now. I will be making that tool you used as well. Please post more!

[@RahulSingh-gm2xz]

If You Want New Tool Pls Contact Me .Rahul [phone]

[@Xynudu]

Hi Pete, Interesting. I've never burnished work like this, but can see the advantage for a seal contact area etc. I would normally use a shear tool, then wet and dry with kero, then steel wire wheel buff (which is a type of burnish). Be interesting to see how this method would go following a shear tool. There shouldn't be any machine marks to contend with in that case. Cheers Rob

[@davidlawrence8085]

Very interesting.....looks like a way to possibly take off those hard to remove last few tenths on a manual lathe..... Thanks for posting ! Dave Lawrence

[@georgedennison3338]

What's the radius of the insert? If you're using a 2mm radius, use a 4 or 8mm radius on the final pass, those ridges will all but disappear. Run a roller on that & you'll have a much closer to mirror finish. Don't know if you could duplicate the effect of a true burnishing tool w/ a roller; never tried. To really get a great understanding of what the surface is like & what you accomplish using different radius tooling & burnishing, splurge in a $10 jeweler's loupe, a 20x, even a 10x & look at the material under a bright light. I bought a magnifying endoscope that plays on my phone for ~$10 on Temu, it works pretty good for magnified viewing if you anchor the camera down. It's really good for checking finish in small boring jobs.

[@michaelclark2840]

Interesting. Hoe much did the OD reduce by in this instance?

[@ninjaabcde]

Can you make a new video showing what we now have in 2023 for burnishing and explain the science behind burnishing?

[@leonguyen120]

Does that bearing rolling, cut into the part diameter or diameter still stay the same dia after burnished.

[@devindesilva123]

Thank you was very important for my module

[@greenarl]

Thank you Pete. A pretty simple improvement. Dimensionally what is the difference between the burnished and unburnished finish. Bob.

[@886014]

robert thomas Hi Bob I didn't measure this one, but others I measured on a 25 mm OD was about 0.003 mm difference between the burnished to unburnished surface as a before and after measurement. Not very much in other words!

[@deadmemes103]

Nice practical use of an old bearing. Beats paying hundreds of dollars for a seldom used burnishing tool.

[@termonostruman]

but the finish of a good tool dont comapre nothing with this.a diamond tool or ball toll

[@GWAYGWAY1]

Smooth knurling really?😊

[@joandar1]

Interesting demonstration Pete, just curious as to what effect this has on the diameter of the part. As in it must reduce the highs of the tool marks, so a micrometer measurement comparison between burnished and tool finish surfaces would be interesting. John, Australia. PS I have the same tool I made years ago and use it the same way as you do for centering however I made it initially for a simple push tool to do basic metal spinning.

[@886014]

joandar1 I haven’t done a side by side comparison but doubt there would be a measurable difference in diameter using standard micrometers as it is just a way to improve the surface finish so would be below the reliable resolution of a mic. However if you have a similar setup let me know if you’re able to detect something different. Thanks for watching and commenting.

[@Larry-fr2pk]

Looks good

[@subinperingave9777]

How roller burnishing differs from Grinding ?

[@GenePavlovsky]

Grinding uses abrasive to remove material. Burnishing smooths without removing material. The difference is akin to honing a knife with a stone (abrasive) vs using a traditional "steel" (a smooth non-abrasive steel rod on a handle) to re-align the edge (note that most steels sold these days are either serrated or coated with some abrasive, those work on a principle similar to a honing stone, and are different from the traditional one that I mentioned)

[@artmckay6704]

Good trick! :)

[@aubrymacielpereirafilho3017]

Muito interessante Valeu muito obrigado!!!

[@mikequinn6206]

Because I have the right equipment, I find it much easier, and quicker, to rough turn to plus 0.010”, or so, and finish grind, consistently holding “gauge” tolerances, including internally.

[@doctorbill6301]

It is SO OBVIOUS that you made up the 'script' as you filmed this !

[@PhilCarson-ge6xe]

WHAT A CRAPPY VIDEO...FELL ASLEEP 16 TIMES

[@copasetic216]

Be nice

[@davidvandemerwe]

what a lack of security!! you shuld never touch a machine like that when is still working!!

[@deadmemes103]

Really? get lost Jesus. Obviously you have no practical experience.

[@northzero2390]

How do you polish then bright spark? It's smooth, it's not going to snag the skin. This is the engineers room, please talk sense or leave.

[@littleworkshopofhorrors2395]

Jesus David Martinez Rangel I hope you are not a H&S policy decision maker because i think there speaks the voice of the inexperienced. if you don't understand the subtleties of such things best to keep away from machinery altogether and leave things to those with experience and still have all ten fingers.

[@GenePavlovsky]

@@littleworkshopofhorrors2395 So maybe the experienced guys can explain to the average home machinist (who might be watching this video), when is it safe and when is it not safe to touch the spinning work?

[@littleworkshopofhorrors2395]

@@GenePavlovsky i am not going to give hard and fast rules for when you can touch spinning work because each stiuation is different and, regrettably, common sense is not thst common. Toucing a smooth round item in the lathe has no safety implications IF there is nothing else to catch you out, this is where (un)common sense comes in. For general situations something like a spinning chuck, not protruding jaws, presented few problems if touched by say a finger in the trailing direction is not risky. In fact woodturners regularly aid the stopping of work by use of a hand on the work or chuck, but they have common sense learned from experience. If you are unhappy with a particular practice the answer is simple, don't do it but one shouldn't criticise someone who knows when it is safe. Experience is a wonderful teacher but cant be taught easily.