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Clamshell
rings allow you to place your telescope on an equatorial
head or with bearings on a Dob mount. 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.
Rotating
rings use our heavy duty clamshell design. Inside
two are two rings that fit your tube, set into each end
of the clamshell rings and secured with adjustable guides.
This example is for an 8" telescope, still in process
of being manufactured.
On the inside edge of the guides are holes which when
finished have nylon screws that loosen to allow rotation
or tightened and secure the inner rings against the outer
clamshell to prevent rotation. Loosen to rotate, tighten
to secure. Bottom plate is 4" width and can be drilled
to mate to your dovetail plate.
Clamshell opens horizontally, is attached on one side
by a heavy duty anodized aluminum hinge, and secured on
the opposite side with a 2-1/2" long thumbscrew from
one board into mating adjacent board, allowing the entire
OTA inside the inner rings to be removed.
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.
Finished: Arrive ready
to use except for adhesive back felt to line inside edge
of rings. We can advise on procuring..
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.
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