top of page

Speed Reducer Gerabox, 3.09:1 Ratio

SR309

The SR-309 provides a 3.09:1 speed reduction (and torque
multiplication) ratio. It’s built using a pair of gears from the time-proven BorgWarner 31-03 gearbox. Added to that is a parking lock pawl and actuator. Integrated mounting features allow it to bolt right up to our iM-225, iM-225W,      iM-375 and SS-250 products in two orientations: left offset or right offset.

cascadiamotionwhite-1222418_orig_edited_

Click on image to download CAD

​Contact Cascadia Motion Sales for CAD models for configurations not shown.

SR309_Male.png

SR309-Male

SR309_Female.png

SR309-Male

cm200 for page.jpg

Start your electrification journey with proven inverter solutions from Cascadia Motion, designed to meet a variety of system needs

cascadiamotionwhite-1222418_orig_edited_edited.png

Driving Innovation in Electrified Mobility

Main Facility

7929 SW Burns Way, Suite F,
Wilsonville, OR 97070-7678

Machining

3780 Eagle Loop, Suite 300,
Hood River, OR 97031

Copyright © 2025 BorgWarner Inc. - All rights reserved

​

Privacy Policy | Terms & Conditions

bottom of page