|
|
Friction control capture with Incised bearing channel. |
Undersized bearings
cause balance problems.
Altitude
bearings on a telescope are the equivalent to a balance pole for tightrope
walkers. Poles spread the walker's balance out over a greater width.
Too short a width (a short or no extending pole) - there is no balancing
on the "tightrope". Imagine getting pushed with your feet
next to each other, you are very unstable. Larger altitude bearings
spread the footing "stance" and weight, widening your telescope
tube's balance. Larger altitude bearings also provide finer incremental
movement, each degree being wider.
|
12" Big Bearings. |
Under-balanced factory
bearings. |
Big
Bearings
Upgrade from undersized to 12".
Many
mass manufactured Dobsonian telescopes use 5" to 5-1/2" altitude
bearings, with inherent balance problems. 12" Big Bearings improve
balance, motion, and add a friction/lock mechanism.
Big Bearings are designed to attach directly onto your tube's small bearings.
We customize Big Bearings bolt holes to match your existing bolt pattern.
Big Bearing fit flat onto existing bearings
|
Small Bearing Internally Mounted
Carry handles are built in. |
Small 12" Bearing
Standard 18" bearings |
Standard Bearings
Small (12") and Large (18").
Standard
small 12" and large 18" altitude bearings have incised channels
for fine tuning guides. Bearing designs have cutouts for easy lifting
and carrying of your telescope. Custom cut Inside
braces precisely match your telescope tube outside diameter. Choose
among these options:
-
3/8"
center bolt hole for attaching to tube.
-
Holes
to mount to your existing tube ring set.
- No mounting holes
(drill your own).
- Can attach inside
mount side-walls.
- Can attach outside
mount side-walls.
- Curved bearing
braces with matching bearing holes.
- Fine tuning friction
guides and incised bearing channels.
-
Other
custom sizes upon request.
What you get (depending
on what item you order): all parts included. Bearings, supports, support
screws, teflon, laminate strips, fine tuning assembly.
What you need: Glue for laminate (contact cement), Philips screwdrivers
(#12 and #4) and longer attachment bolts if necessary. |
|
Pricing:
|
Big
Bearings - drop in upgrades
|
| BBK |
Big Bearings Kit |
$78 |
| BBF |
Big
Bearings Finished |
$123 |
|
Standard
Bearings
|
| SBK |
Small
Bearings (12") Kit |
$72 |
| SBSK |
Small
Bearings with Supports Kit |
$98 |
| SBF |
Small
Bearings Finished |
$106 |
| SBSF |
Small
Bearings with Supports Finished |
$148 |
| LBK |
Large
Bearings (18") Kit |
$98 |
| LBSK |
Large
Bearings with Supports Kit |
$128 |
|
|
Ordering:
|
