Precision CNC
Clearance Specials In Stock
Skywatcher 10 Collapsible Mount.
Azimuth Bearing Laminate Rings
Dobsonian Mounts
Current lead time: 6-8 weeks.
Overview Of Mount Choices

Standard Solid Mounts.
Custom Solid Mounts
Custom Collapsible Mounts
Collapsible mount videos 1 and 2
Dobsonian Mount Accessories.
Height Adjustment Stands.
Digital Setting Circles
Nexus II
Sky Commander
Amateur Telescope Making
Mirror Cells, Mirror Masks
Mirror Masks.
Aperture Masks
Sharpening Double Stars!
Altitude Bearings
Standard 12" And 18" Bearings.
Fix For 5" Small Bearings.
Altitude Bearing Guides.
Altitude Bearing Supports.
Clamshell Rings For Tubes
Upcoming Items
Contact us to inquire.
Mirror Box Integrated Cells.
Rotating Tube Rings.

Upper Tube Assembly Rings.
Anonymous Survey
How did you find us?
Zip / Postal Code

Clamshell Rings
For up to 12" tubes. E-mail for larger sizes and shipping estimates

Clamshell drilled for dovetail plate

For equatorial head.

For Dob Mounting

Type Clamshelll Ring
Kit Drilled for Equatorial Head Mounting.
Kit With Small Bearings up to 12".
Kit With Large Bearings up to 18".
See the bottom of our Bearings Page for Dob Bearing Supports

Tube Diameter using cloth tape measure.

Clamshell rings allow you to place your telescope on an equatorial head or with bearings on a Dob mount. Custom designed to fit the outer circumference of your telescope tube, heavy duty rings can be drilled to match your mounting plate hole pattern. If you are building your own mount consider a clamshell ring and bearings. Includes bearing laminate.

Kit: All parts included, wooden parts are rough sanded with 80 grit, holes predrilled. All parts dry-fitted before shipping. Kits may be shipped worldwide. What you'll need: Philips screwdriver, sandpaper, wood glue, adhesive backed felt to line inside of rings.

CNC precision cut 3/4" Baltic Birch plywood. Anodized heavy duty aluminum piano hinge. Steel wood screws. Clamshells open and close using a 2-1/4" thumb screw that passes through one of the top boards into a 1/4-20 brass threaded insert in the abutting board. Rotating ring segments ride on teflon and crystal 909-42 Formica.