ER 20 Collet Blocks

I have not been able to find collet blocks in this size as they seem to start at ER32.
In my AJS restoration I have had to make many new bolts and it is cheaper to use round stock than buy correct size of hex bar. I also use them for slotting screw heads.
I have made two collet blocks for hex and square bolt heads, these are not precision but within a .002 thou T.I.R. which is fine for bolt heads etc and used in my vertical slide on the lathe.
Attachment 48683Attachment 48684

A typical use is a Triumph repair chain case adjuster bolt which has a stripped thread, the large one gets bonded in and both have O rings.
I recently past over a nice milling machine locally but a 82 years young I decided not to bother.

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Thanks olderdan! We've added your ER20 Collet Blocks to our Machining category,
as well as to your builder page: olderdan's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-er20-collet-blocks"> <img src="/uploads/273898/homemade-er20-collet-blocks.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-er20-collet-blocks">ER20 Collet Blocks</a> <span> by <a href="https://www.homemadetools.net/builder/olderdan">olderdan</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/collet'>collet</a> </div> </div> </div> </div>
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Quote:

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Originally Posted by olderdan

I have not been able to find collet blocks in this size as they seem to start at ER32..

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I have these in ER32 but I seem to recall seeing them for ER25.