are custom cut to to your tube diameter. Use them
to build a Dobsonian, turn your equatorially mounted
Newtonian into a Dobsonian, or
"Dob" your equatorially mounted newtonian
or SCT using your existing rings. Attach
bolt through a center hole in the bearing (not shown
in above image). Avaiable with or without an outside
1/8" thick by 3/16" tall lip. Without a
lip the bearing surface is up to 11.875". Supports
are 3/4" wide, bearings 0.708" wide. Kits
are rough sanded and assembled but not spray finished
Available with supports cut to fit the outside diameter
of your tube, or as
altitude bearings that fit against square or
rectangular mirror boxes, typically for 12 inch or
larger telescopes. Large bearings are 12" to
23.875", and available with our without an outside
1/8" thick by 3/16" tall lip. Kits ship
rough sanded and assembled but not spray finished
Big Bearings: makes 5"
Big Bearings: If you have typical small factory
installed bearings (5" or 5.5" diameter),
a Big Bearings upgrade provides a "drop in"
replacement with a 12" bearing surface. That
means smoother motion, finer control, greatly improved
balance without springs or counterweights, and no
lateral slippage. Bearing mounts onto exisiting altitude
bearing, Support bracket with teflon mounts onto the
rocker box side board. Then remove the old teflon
so the Big Bearing rides freely. Requires a drill
and Phillips screwdriver. How easy can it get?
. Kits ship rough sanded
and assembled but not spray finished (raw).