1/2 inch Altitude Bearings

Astrosystems altitude bearings are available in 7 sizes and feature premium Baltic Birch plywood.  Each
bearing is supplied with your choice of smooth or textured  (Ebony Star) laminate ready to apply and
each is finish routed with a 1/8 inch radius edge, except the laminate edge.  The classic two spoke
design makes these strong, light and stiff when supporting the vertical load of the telescope.  This
results in crisp, smooth motion.  For optimum stability and best movement we recommend using a bearing
diameter approximately 4-6 inches over the primary mirror diameter.  Unfinished and unsanded.

3/4 inch Altitude Bearings

Astrosystems altitude bearings are available in 7 sizes and feature premium Baltic Birch plywood.  Each
bearing is supplied with your choice of smooth or textured  (Ebony Star) laminate ready to apply and
each is finish routed with a 1/8 inch radius edge, except the laminate edge.  The classic two spoke
design makes these strong, light and stiff when supporting the vertical load of the telescope.  This
results in crisp, smooth motion.  For optimum stability and best movement we recommend using a bearing
diameter approximately 4-6 inches over the primary mirror diameter.  Unfinished and unsanded.

Other AstroSystems Dobsonian Bearings