Does anyone have tips on how to drill jewelry piece secured in
thermoplastic (Jett Sett). Does this plastic damage the drill bits
or burs used when holes are drilled/burred?
It is harmless to drill bits. If you don’t contaminate it with metal
swarf you can easily melt it with the parent lump for re-use.
Does it melt easily from friction heat?
Yes, use a slow speed to minimise the effect. The biggest problem is
clogging the drill flutes, so remove it frequently.
Regards, Gary Wooding