lathe burnisher. The easy way.

[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.

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



Oiled part and first test results where impressive



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

[DIYer]

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:

Lathe Burnisher by Cascao

tags: lathe

[Jon]

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:

Pipe Center by Cascao

tags: arbor

Lathe Burnisher by Cascao

tags: lathe

[Toolmaker51]

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.

[ironwrx]

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