2 CIM Ball Shifter

VEXpro Ball Shifters provide a battle-proven 2-speed gearbox for easy integration into any FRC robot drivetrain. By utilizing a ball-lock style shifter, this gearbox is capable of “on-the-fly” shifting even when at full throttle. The VEXpro 2 CIM Ball Shifter includes mounting for one or two CIM-style motors. Three carefully selected ratio options allow for maximum versatility.

Every aspect of this transmission was designed with size in mind. The 2 CIM Ball Shifter puts a 2-speed transmission into a tiny, lightweight form factor. The ball lock shifting method reduces the gap between the two gear reductions and allows for an extremely narrow assembly. The gear reductions were specifically chosen to reduce the overall transmission size and complexity while remaining highly efficient due to the AGMA 11 quality gears with teflon infused ceramic coating.

Weight: 2.50 lbs
Ball-lock shifter method enables smooth shifting, even at full speed
Designed for use with one or two CIM Motors
Housing is completely enclosed - keeps metal chips out, grease in
Face mount or install using the included mounting angle
Designed to mount a Grayhill 63R series encoder (can be adapted for any encoder with male 1/4" shaft)
Assembly Required, see instructions below
Encoders, Motors, Cylinder not included

Note: A pneumatic shifting cylinder and fitting kit is not included in the Ball Shifter kit.
Be sure to add these below in the "Pneumatic Cylinder & Fitting Options" category if needed.

Initial Stage: 40:12
High Gear Stage: 44:40
Low Gear Stage: 60:24

3rd Stage Option 1: 64:20
3rd Stage Option 2: 60:24
3rd Stage Option 3: 54:30
3rd Stage Option 4: 50:34

Gearbox	Overall High Gear Reduction	Overall Low Gear Reduction	Spread
2-Stage	3.667:1	8.333:1	2.27x
3-Stage 64:20	11.733:1	26.667:1	2.27x
3-Stage 60:24	9.167:1	20.833:1	2.27x
3-Stage 54:30	6.601:1	14.999:1	2.27x
3-Stage 50.34	5.392:1	12.255:1	2.27x

The 2.27x spread between low and high gears in the VEXpro 2 CIM Ball Shifter was specifically chosen to serve the needs of FRC designers. When designing an FRC drivetrain, teams typically try to ensure that the robot low-gear can survive a continuous pushing match (with high traction wheels) without tripping breakers. They then choose a high-gear which is "fast" enough to zip around the field, without being uncontrollable or accelerating too slowly. After doing detailed market research, we learned that many teams have found themselves frustrated and limited by the typical spreads found in some of the "off the shelf" shifters on the market. When their low-gear is at the right speed, the high-gear is too fast, or when their high-gear is in the right spot their low-gear is too slow. Not anymore; this shifter is right where FRC robots need it to be.