Thin collet for lantern chuck

Hi All
I needed to thread some 3/16” diameter x 1/4” long round head brass rivets 7BA to hold the baffle plate angles to the side plates of the water tank for my 3”scale Foden steam wagon.

I made a lantern chuck a few years back to thread 1/4 diameter copper rivets 2BA for stays for the boiler which were considerably longer.

To machine the short and smaller diameter rivets a small collet was machined so there was enough protruding out to be threaded but still allowing the chuck to clamp the rivets.

Photos below show the results

Attachment 50510 Attachment 50511Photos showing both sides of collet.

Attachment 50512Collet loaded into the front of the lantern chuck.

Attachment 50513 Attachment 50514Rivet held and tailstock die holder fitted with 7BA split die to cut thread.

Attachment 50515Completed rivet’s

thank you for viewing
The Home Engineer

<!-- BEGIN /var/www/html/homemadetools/protected/modules/zeus/views/tool/postUpdate.php -->
Thanks thehomeengineer! We've added your Thin Collet to our Workholding category,
as well as to your builder page: thehomeengineer's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-thin-collet"> <img src="/uploads/277164/homemade-thin-collet.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-thin-collet">Thin Collet</a> <span> by <a href="https://www.homemadetools.net/builder/thehomeengineer">thehomeengineer</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/collet'>collet</a> </div> </div> </div> </div>
<!-- END /var/www/html/homemadetools/protected/modules/zeus/views/tool/postUpdate.php -->