Lathe chuck spider - how to keep the 3-legged ones from shifting/flopping

[aribert]

I understand the retention of a lathe spider that has slots for the chuck jaws and is solid in the middle - such as this image from the web: https:/...

[aribert]

Thank you all for your responses.

MattiJ: It's more like boring head for mill or HBM
Thank you for the quick response and the link...

[aribert]

First of all - thanks to all of you who responded to my question about using spade drills a couple of weeks ago.

Recent auction purchase...

[aribert]

I have frequently seen spade drill bit holders and drill bit tips, both carbide and HSS tips at auction. Here is an example of a spade drill tip: htt...