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About altitude
bearings balance and motion.
Altitude
bearings function much as do balance poles for tightrope walkers. Longer
poles spread balance out over a wider area. Imagine being pushed at
your shoulders with your feet/stance close together. You will be very
unstable. "Lengthening the pole" (widening your footing) adds
a great deal of stability. Larger altitude bearings achieve the equivalent
of widening your footing. And an added benefit is adding finer incremental
movement, with the increased bearing circumference moving each degree
farther apart. The difference will make you a quick fan of larger bearings.
Customer
photos/comments
Pricing/Ordering
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5" factory bearings. |
Bearing upgraded to 12". |
5" bearings upgraded
quickly and easily to 12".
About
balance and motion
Pricing/Ordering
Photos: (L) small
factory 5" bearings, (R) upgrade attached externally.
Fit internal or external
to side walls depending on mount design.
Bolt holes width and
diameter customized to fit your telescope tube.
All
parts included: bearings and supports, laminate, Teflon, screws.
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12" Bearing Internally Mounted.
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12" Bearing (UN-sanded).
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Standard 12"
and 18" bearings.
About
balance and motion
Pricing/Ordering
All
bearings use "3/4" inch Baltic birch plywood (18mm). Available
as kits or finished. Finish uses gloss polymer from General Finishes.
Choose among these options - advise what you need or ask us:
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Carry handles are built in. |
18" bearing. |
What
you get: all parts included. Bearings, Teflon (with supports only),
laminate strips, fine tuning assembly (optional).
What you need: Kits require glue for laminate (contact cement), glued
with finished bearings, Torx (#8) and Phillips (#4) screwdriver, longer
tube attachment bolts (if necessary).
Choosing between 12" and 18" altitude bearings: Generally,
the shorter the tube, the smaller your bearings can be and maintain balance.
Larger tube diameters and/or heavier, the larger the bearing needed.
Several "rules of thumb" for bearing size exist, from 1.2 to 2.0
times the telescope's aperture. Size matters: Go bigger and have no regrets. |
Pricing/Ordering
Contact
for shipping cost.
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5"
Bearing Upgrades
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| 5BUK |
5" Bearings Upgrade Kit |
$65 |
| 5BUF |
5"
Bearings Upgrade Finished |
$111 |
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Standard
12" Bearings
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| S12BK |
Standard
12" Bearings Kit |
$53 |
| S12BSK |
Standard
12" Bearings with Supports Kit |
$67 |
| S12BF |
Standard
12" Bearings Finished |
$87 |
| S12BSF |
Standard
12" Bearings with Supports Finished |
$105 |
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Standard
18" Bearings
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| S18BK |
Standard
18" Bearings Kit |
$79 |
| S18BSK |
Standard
18" Bearings with Supports Kit |
$99 |
| S18BF |
Standard
18" Bearings Finished |
$121 |
| S18BSF |
Standard
18" Bearings with Supports Finished |
$147 |
| CSB |
Custom
Size Bearings: Request quote. |
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