On 7/11/2017 10:27 AM, robobass wrote:
Hi. I make a product (http://basscapos.com/robpin.html) which uses lengths of SS hot formed tube 10mm OD x 8mm ID. Some customers want a press in, hardened point on the end of one of the tubes.
http://i389.photobucket.com/albums/o...ps8uuji8py.png
The design wants the tubes to be interchangeable, so ideally the point should be both installable and removable by the customer, who presumably has no metalworking skills or tools. Maybe this simply isn't possible.

Right now we're making it with a straight shaft 8mm long, with a tapered end. Problem is that the tube is not all that consistent for either roundness or ID, so naturally some points fit nicely, while others don't work at all. Besides changing to a more dimensionally consistent tubing, is there a tweak which would make the point more universal? Maybe a very slight taper instead of a straight shaft?
Thanks

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How about epoxying a neodymium magnet into the tube to hold the tip?

Like these:

https://www.apexmagnets.com/8mm-x-8m...i2wAodE JwD3Q