lathe burnisher. The easy way.

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Saw somewhere a fancy lathe burnisher using a sfere supported by a bearing.
Sfere was used to apply big pressure in only one small portion of part beeing finished.
Toll worked very well improving finish and I decided make one.
but...
While thinking about how I will do mine realized that I could design one easly if using a special bearing from a car tripoide axle to replace sfere and bearing. This bearing has an curved outter diameter that allow pressure be appied in only one point of part, just like sfere do.

after a short trip to a junk yard, installed bearing in my boring bar AXA tool and here what I come with:

https://live.staticflickr.com/65535/...13b8dd30_z.jpg

Oiled part and first test results where impressive

https://live.staticflickr.com/65535/...6dca1c24_z.jpg

Definitly best finish on a mini lathe turning A36 steel I archived.

https://live.staticflickr.com/65535/...c8458115_z.jpg

Thanks Cascao! We've added your Lathe Burnisher to our Lathe Accessories category,
as well as to your builder page: Cascao's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-lathe-burnisher"> <img src="/uploads/261484/homemade-lathe-burnisher.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-lathe-burnisher">Lathe Burnisher</a> <span> by <a href="https://www.homemadetools.net/builder/Cascao">Cascao</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/lathe'>lathe</a> </div> </div> </div> </div>

Congratulations Cascao - your Lathe Burnisher is the Homemade Tool of the Week!

This is a clever and resourceful use of a CV joint tripod bearing to create a burnishing tool. Fast, inexpensive, and the finish looks great.

Some more nice builds from this week:

Assorted Clamps by The Hobby Machinist NZ
Skid Steer Track Mechanism by darus627
QCTP Tool Holders by Improvised DIY
Trunk Floor Transition Plate by rgsparber
Metal Bender by orioncons36
Ring Cutting Jig by The Hobby Machinist NZ

Cascao - we've added your tool entry to our All Homemade Tool of the Week winners post. And, you'll be receiving a $100 cash prize, in your choice of Amazon, PayPal, or bitcoin. Please PM me your current email address and prize choice and I'll get it sent over right away.

This is your 2nd Homemade Tool of the Week win! Here are both of your winning tools:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/forum/pipe-center-diy-63390#post98958"> <img src="/uploads/204597/homemade-pipe-center-2.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/forum/pipe-center-diy-63390#post98958">Pipe Center</a> <span> by <a href="http://www.homemadetools.net/builder/Cascao">Cascao</a></span> </div> <div class="tags">tags: <a href='http://www.homemadetools.net/tag/arbor'>arbor</a> </div> </div> </div> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/forum/lathe-burnisher-easy-way-100325#post234053"> <img src="/uploads/261484/homemade-lathe-burnisher.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/forum/lathe-burnisher-easy-way-100325#post234053">Lathe Burnisher</a> <span> by <a href="https://www.homemadetools.net/builder/Cascao">Cascao</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/lathe'>lathe</a> </div> </div> </div> </div>

Quote:

Originally Posted by Cascao

Saw somewhere a fancy lathe burnisher using a sfere supported by a bearing.
Sfere was used to apply big pressure in only one small portion of part beeing finished.
Toll worked very well improving finish and I decided make one.
but...
While thinking about how I will do mine realized that I could design one easly if using a special bearing from a car tripoide axle to replace sfere and bearing. This bearing has an curved outter diameter that allow pressure be appied in only one point of part, just like sfere do.

Spherical contact is the most logical. Rollers are used for internal burnishing, dwell time time would likely create tapers.
Burnishing is just like knurling, pushing instead of cutting material.
Interested in what feed rate worked, guessing tells me about 1.5x the rate surface was cut, and were there any measurements taken before and after?
All that questions if set at a slight incline would even work better.

Nice simple design. I like it. Possibly “SPHERE”?