I'm not sure what they are called in English...in German they are called "Backenschoner" or "Schutzbacken".
They exist in many variations. This variation here will nicely fit on a small Proxxon vise and not only hold the workpiece in the middle of the shoe. You can also lay the pipe on top or use the holes to drill various diameters (1-5 mm) in the center of your pipe/axle.
Printer:
Renkforce RF500
Rafts:
No
Supports:
No
Resolution:
0.2
Infill:
Category: DIY50%
The author marked this model as their own original creation. Imported from Thingiverse.