Altitude Bearings 

Altitude Bearing Locking Captures
Now Standard On All Bearings.

Captures secure your OTA to the mount and centers it on the mount. Add your desired amount of friction. Lock the bearings in place when changing eyepieces.

"I really like the nylon screws you have installed to lock the altitude motion of the mount. These are really helpful when changing from a heavy low power wide field eyepiece to a small light weight high power eyepiece. I use that feature a lot as it provides the necessary friction to keep the scope from shifting during an eyepiece change."
Dave C.  

12" Big Bearings.

5" factory bearings.

Small factory bearings are underbalanced.
Fix with quick attach Big Bearings 12" upgrade.

Small factory bearings standard on many mass produced Dobsonian telescopes use clamps and springs to fix an inherent design flaw causing balance problems. 12" Big Bearings solve this issue, improving balance, motion, giving finer control, adding a lock mechanism for eyepiece change.

Every order is individually designed with hub hole size and spacing that fit onto your existing small bearings. Attach the Big Bearings to the existing small ones, install the side board supports under them, then remove the factory"Teflon" pads to complete the upgrade; a five minute job. Bearing Fine Tuning Guides are now included with Big Bearings to allow friction adjustment and keep bearings centered on the mount.

All parts included: bearings, supports, support screws, teflon, bearings laminate, fine tuning assembly. Requires glue for laminate (contact cement), Philips screwdriver and 3/4" longer bearings bolts.

Big Bearings Order.

Customized Big Bearing Kit

Factory kludge.

Standard 12" bearings with carrying handle cutouts, supports and guides.

Standard 12" and 18" Bearings.

Standard 12" and standard 18" altitude bearings with incised channels for fine tuning guides and sideboard supports. Both 12" and 18" designs incorporate cutouts to allow easy lifting and carrying of your telescope. Inside braces (shown on left bearing) are individually cut to precisely match your telescope tube outside diameter. Choose among these options:

  • With 3/8" center hole for bolting to you tube.
  • Holes to mount to your existing tube ring set.
  • No mounting holes (drill your own).
  • Curved bearing braces with matching bearing holes.
  • Fine tuning guides, channels and sideboard supports.
  • Other custom sizes upon request.
Order:

Carry handles are built in.

Standard 18" bearings