Precision CNC
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Dobsonian Mounts.
Which mount is best for you?
Standard solid
.
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Dobsonian Mount Accessories.
Height adjustment stands.
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.
Teflon, Laminate & More.
Manual setting circle boards.
Bearing laminate.
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.
Mirror Cells.
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Masks For Image Sharpening.
Visual: Correct for TDE/soft images.
Imaging: Remove star flare.

Aperture
: Refactor sharp Newts.
Sharpening double stars in Dobs
.
Bearings: Altitude and Azimuth.
Replacing small 5" bearings.
Standard 12" bearings.
Standard 18" bearings
.
Custom bearings.
Altitude bearing guides.
Altitude bearing supports.
Clamshell And Rotating Rings.
For Dobsonian mounts.
  with rotating rings.
*
For equatorial mounts.
  with rotating rings.
*
Upcoming Items. Contact us for info.
Mirror box integrated cells.
Upper tube assembly rings.
Other.
Custom jobs / About us.
* Now available: Please inquire.

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 Clamshell Ring
Price
Kit Drilled for Equatorial Head Mounting.
$71.00
Kit With Small Bearings up to 12".
$80.00
Kit With Large Bearings up to 18".
$84.00
See the bottom of our Bearings Page for Dob Bearing Supports

 
Order:
 
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.


Materials:
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.