When I got my quick change tool post set, it included this combo knurl tool & facing holder. Kinda useless as I hate push knurlers. So I decided to make it useful by sawing off the knurler, extending the slot and punching a couple of threaded holes (M10x1). It is made of hardened steel, but it ain’t all that hard (easy to cut with a sharp file) so it didn’t put up any fight, didn’t even notice any difficulties power tapping.
- Nipple spear take 2. Got smart and copied the commercial version. Learned a few things about work holding, the bulbous end fits both a collet and a center. On a manual lathe you flip it couple of times. Two tapers.Spoke spear - for digging nipples out of a puddle of linseed oil and putting them in a deep(ish) dish rim socket. Serrations really help retain the nipple. No idea of the angle, just stuck a shim under the front of the spinner and ground away.