Drive pulley and block mount for an Acme rod linear drive. This was used to drive the precision RA axis on a home-built astrophotography mount. The 16mm bearings on each side can be pinched between a pair of pins for backlash-free mounting.
For more detail please see www.td0g.ca/projects/startracker3 .
Parts Required for the Base:
2x 203VV bearings
2x 5 x 16 x 5mm bearings
Acme Rod + Bearings
Nema 17 motor with 16-tooth pulley
200mm timing belt
Parts Required for the Backlash-Free End Pivot:
3x 5 x 16 x 5mm bearings
Compatible with 4mm-lead Acme Rod