Joyce Trunnions are used in installations where the jack moves through an arc during operation. These jacks are often configured with motor mounts or as ComDRIVES®.

Trunnion adapter plates bolt to the jack flange and have precision bores for trunnion pins.

Design Information
The trunnion pins should be supported to within 1/16 inch of the trunnion adapter plate. See the “A” dimension in the table for the width of the mounting surfaces should be less than or equal to the “A” dimension plus 0.13 inches.

The customer supplied trunnion pins should be ground to the “D” diameters shown in the table. The trunnion pins should be made from steel with a hardness greater than 30 HRC and a yield strength greater than 60,000 psi.