TBC Bushings for 30 Caliber Cartridge Pens
Turning Between Center (TBC) Bushings custom machined to finish the top blank to complete our CNC engraved 30 caliber cartridge pen kits. Set includes one upper and one lower bushing.
TBC bushings require a 60 degree dead center for the headstock and 60 degree live center for the tailstock to use properly. They do not mount on a mandrel.
UPDATE: We are in the process of changing vendors for these bushings, so they will be out of stock in the mean time.
As a substitute, the upper pen blank for 30 Caliber Cartridge pen kits may be turned with the following bushings:
- UPPER: Euro or Designer finial bushing
- LOWER: 30 CAL Bolt Action Bushing
Please contact us if you have any questions.