Dobsonian Mounts.
Amateur Telescope Making.
Mirror Cells.
Mirror & Aperture Masks.
Sharpen soft images.
Eliminate spider spikes.
Cure mirror clip flare.
Clamshell & Rotating Rings.
Altitude Bearings.
Standard Solid Mounts
Features, construction, materials, etc.

These mounts are a preset design and size. For taller and/or wider sizes please see our custom solid or collapsible mounts.

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" below).

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.



Add a manual setting circle. $35.

Pair with an altimeter (examples).

Fitting requirements and Swing Through Room

Telescope bearings mounted onto tube maximum outside tube diameter:
Telescope mounted in rings, rings outside flat to flat maximum distance:
Maximum distance below balance point (balance point instruction below):

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".
Square that number: 25.
3. Square the 20" balance point dimension: 400.
4. Sum the two squared numbers: 425.
5. Obtain square root of that sum using a calculator: 20.62".

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.