These mounts are a preset design and size. For taller and/or wider
sizes please see our custom solid
Standard Solid Mounts fit up to telescope tubes up to 13.1"
outside diameter, or up to 13.6" flat to flat tube rings.
This design allows 23" of swing-through room below the tube's
balance point (see "fitting requirements"
Attaching our altitude bearings: Altitude bearings can clamp solidly
to your tube using a 3/8" bolts. The bolt inserts from the
outside through a hole in the center of the bearing, and into
a 3/8" hole you drill into the tube's wall. Inside the tube
secure the bolt with a washer and nut on the bolt. Bearing have
an inside arced brace with a curve we cut to precisely fit your
tube. You can see bracing (shown loose in mount unassembled above).
If you are using a ring set, we drill holes in the bearings to
accept bolts to attach the bearings to your rings.
Standard Mount Kits arrive rough sanded. All parts included, screw
and stiffening internal dowel holes all predrilled, countersunk.
Requires fine sanding, paint or finish, glue bearing laminate
and assembly. Spray finished unassembled are also available.
a manual setting circle. $35.
Pair with an altimeter (examples).
Fitting requirements and Swing Through Room
Telescope bearings mounted onto tube maximum outside
mounted in rings, rings outside flat to flat maximum
distance below balance point (balance point instruction
We can compute your tube's swing through room for
you. Or use this example computation. This example
is a 10" outside diameter tube with 20"
balance point. If your tube has a protective ring
on the back end, use the ring's diameter instead.
Determine your balance point by having heaviest
eyepiece in focuser, and all finders you use installed.
Then roll the tube over a broomstick to see where
it wants to balance. Measure from there to the end
of the tube.
1. Determine 1/2 the tube outside diameter: 5".
that number: 25.
3. Square the 20" balance point dimension:
4. Sum the two squared numbers: 425.
5. Obtain square root of that sum using a calculator:
That square root equals the minimum required swing
through room for your tube.
7. Add one half inch (or more) to clear azimuth
bearing nut: 21.12".
8. In this example, 21.12" fits within the
allowed 23" maximum swing through room.
Cancellation policy: receive a refund
after order less PayPal transaction fees.