What the thread found

• Bear-Bel gimbals are designed with adjustable grub screws to fine-tune axis intersection, making them adaptable to posts that may not be perfectly circular.
• Master and Ultra posts measure 1.58 inches in diameter, while some gimbal models are built for 1.5 inch posts, requiring verification with the manufacturer about compatibility or spacer options.
• Static balance should be checked first by confirming the rig hangs level when rotated 90 and 180 degrees before attempting dynamic balance adjustments.
• Dynamic balance on a Bear-Bel gimbal with adjustable screws is achieved by spinning the rig 180 degrees, slightly opening the grub screw in the direction the rig tilts, closing the opposite screw by the same amount, restoring static balance with the top stage, and repeating until the rig remains balanced at all speeds.
• The manufacturer can produce custom gimbals for different post sizes if needed.

Depends on

• One user reported difficulty achieving dynamic balance with an older Bear-Bel gimbal despite adjustment attempts, though the manufacturer later modified the bearing or design.
• The adjustment procedure requires practice and patience, though users report it becomes faster with experience.
• Exact specifications for which post sizes are currently available from the manufacturer are not confirmed in the discussion.

Parts

Top Stage, Gimbal Bearing, Low Mode

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