55mm Turntable Base

The 55mm Turntable Base can be operated manually with the 55mm Manual Bridge, or driven with a stepper motor with the 55mm Stepper Bridge.

A Shorty turntable is comprised of a 55mm Turntable Base and a 55mm Turntable Bridge. The entrances are sized for 25mm long Rokuhan R-030 straight track. You have to trim the roadbeds on adjacent entrance tracks. I sugest using a Rokuhan Track Miter Box and a hobby saw. 

The big hole in the middle accepts a flanged, 5mm ID, 11mm OD, 4mm tall ball bearing that keeps the bridge centered.  The bearing is a model MF115ZZ, Miniature Flanged Ball Bearing from Bearings Direct. The shallow holes accept  magnets to create magnetic detents to align the bridge with the each entrance. The magnets are model D210, 1/8" diameter, 1/32" thick rare  earth magnets from K & J Magnetics. They are installed from the bottom.