Manually Grease Flex Couplers on Besser Simem Gemini Series Twin Shaft Mixers

The Besser Simem Gemini Series (Twin Shaft) mixer is equipped with metallic, rotating flex couplers, containing internal and external splines. The flex couplers absorb the movement or deflection of the dual, opposing shafts as they are impacted by aggregates during the mixing process. Absorbing the deflection protects the twin planetary gearboxes output bearings.

Since the flex couplers rotate, the central and automatic Trabon grease systems cannot provide them with lubrication. This means that you MUST grease the flex couplers fully, every five days (120 hours) of operation.

Mixing shaft side of the flex coupler, viewed through the transmission-mounting flange during a teardown procedure. The flex coupler is designed to allow the movement of the shaft, under load, without damaging the transmission.
One-half of the coupler is removed after removal of the transmission. Note the grease, which is applied by grease zerks fitted on the outside of the coupling.
Grease these fittings every five days (120 hours) of operation, with 1/4 tube (about 10 ounces) of grease.
The three stage planetary transmission removed for replacement of the shear-shaft.

Posted 25 March 2003