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Thread: lathe burnisher. The easy way.

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    Supporting Member Cascao's Avatar
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    Cascao's Tools

    Lightbulb lathe burnisher. The easy way.

    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.

    Attached Thumbnails Attached Thumbnails lathe burnisher. The easy way.-53481174971_0913b8dd30_z.jpg  

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  2. The Following 9 Users Say Thank You to Cascao For This Useful Post:

    57_210 (Jan 27, 2024), albertq (Jan 28, 2024), drivermark (Jan 24, 2024), Inner (Jan 28, 2024), Jon (Jan 24, 2024), nova_robotics (Jan 23, 2024), PJs (Jan 30, 2024), rlm98253 (Jan 26, 2024), sossol (Jan 24, 2024)

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    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:




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    Cascao (Jan 23, 2024)

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    Jon
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    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:


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    Cascao (Jan 26, 2024)

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    Toolmaker51's Avatar
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    Quote Originally Posted by Cascao View Post
    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.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

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



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