This clamshell rings with altitude bearings kit is custom designed to fit your Dobsonian mount and telescope tube. It allows you to rotate the tube to better position your focuser, or move it forward and back for rebalancing.
All parts included. We deliver rough sanded. You fine sand, paint or finish, and assemble.
Rings are held together on bottom pair of 2" wide boards by a heavy duty anodized aluminum hinge on the bottom side. Top side pair of boards clamp together with a 2-1/2" thumb screws through one board, into a 1/4-20 wood insert in the opposite board. Bearings are up to 12" diameter. Inside diameter of rings cut to within 1/8" of your telescope tube. You complete by obtaining 3/32" thick x 1/2" wide adhesive backed felt which is applied on the inside edge of the rings to fit tightly. We can advise where to purchase.
Parts include 18mm Baltic Birch CNC machined plywood, Crystal 909 preferred laminate for bearing edges, wood screws, anodized hinge, thumb screw and wood insert.
Easy to order, we ask the circumference of your telescope tube (use a cloth tape measure), mount's bearing cutouts diameter, and dimension between the side boards. Please contact us before ordering so we can discuss the dimensions.
Questions? Ask us!
Filed under: Eyepieces & Accessories