Home > VEXpro > Gears & Gearboxes > 2 CIM Ball Shifter

The 2 CIM Ball Shifter is the ultimate solution for a two-speed transmission in a competition robot, enabling seamless "on-the-fly" shifting in a compact, light, and easy to maintain package. 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. 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 2 CIM Motors
  • Housing is completely enclosed - keeps metal chips out, grease in
  • Face mount or install using the included mounting angle
  • Includes all hardware to mount US Digital or Grayhill Encoder
  • Assembly Required, see instructions below
  • Encoders, Motors not included
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2 CIM Ball Shifter 3rd Stage Kit

The 2 CIM Ball Shifter 3rd Stage Kit can be used to upgrade an existing 2 Stage Ball Shifter to a 3 Stage version. Use the additional gearing options to achieve an even greater reduction while maintaining the same robust lightweight gearbox design.

NOTE: Gears not included.


Our Price: $24.99
In Stock
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Pancake Pneumatic Cylinder, 3/4" Bore, 1/2" Travel

Our Price: $39.99
(Out of Stock)
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VEXpro Ball Shifter - 2 Stage

The Ball Shifter is the ultimate solution for a two-speed transmission in a competition robot, enabling seamless "on-the-fly" shifting in a compact, light, and easy to maintain package. Three carefully selected ratio options allow for maximum versatility.

Every aspect of this transmission was designed with size in mind. The 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. Highly efficient due to the AGMA 11 quality gears with teflon infused ceramic coating.

  • Weight: 2.50 lbs
  • Pancake cylinder NOT included
  • Ball-lock shifter method enables smooth shifting, even at full speed
  • Designed for use with 2 CIM Motors
  • Housing is completely enclosed - keeps metal chips out, grease in
  • Face mount or install using the included mounting angle
  • Includes all hardware to mount US Digital or Grayhill Encoder
  • Assembly Required, see instructions below
  • Encoders, Motors not included

Our Price: $169.99
In Stock
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VEXpro Ball Shifter - 3 Stage 60:24
Does NOT include Pneumatic Cylinder.

http://www.therobotspace.com/ProductDetails.asp?ProductCode=vex-217-2778

Our Price: $179.99
In Stock
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VEXpro Ball Shifter - 3rd Stage Optional Gear Kit 64:20

Our Price: $28.98
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2 CIM Ball Shifter Reduction Stages

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

Optional 3rd Stage: 60:24
Optional 3rd Stage: 64:20

2 CIM Ball Shifter Overall Reductions & Spread

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 9.1667:1 20.8333:1 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.

2 CIM Ball Shifter Parts & Optional Accessories

Some of these parts and kits are included with Ball Shifters, check the Kit Contents list below for details.

Encoder Output Details

Encoder output spins at 3x the speed of the 2 CIM Ball Shifter output shaft. The gear ratio is 36:12 between the encoder and shaft.

Technical Specifications

Kit Contents
Downloads & Docs Assembly Instructions - 2 Stage (PDF)
Assembly Instructions - 3 Stage (PDF)
Recommended Grayhill Encoder Spec Sheet (not included)
US Digital Encoder Information (not included)
Outputs 1/2" hex
Specification VEXpro Gears Require Lubrication. We recommend white lithium grease.
Material Type Gears: 7075 T6 Aluminum with teflon infused ceramic coating
Shafts: 7075 T6 Aluminum
Shifter Housing: Glass-filled Nylon
CAD Model 2 Stage with Grayhill Encoder (STEP)
2 Stage with US Digital Encoder (STEP)
3 Stage 60:24 with Grayhill Encoder (STEP)
3 Stage 60:24 with US Digital Encoder (STEP)
Ball Shifter Short Output Shaft (STEP)
Ball Shifter Short Output Shaft Assembly with Gears (STEP)
Ball Shifter Long Output Shaft (STEP)
Ball Shifter Long Output Shaft Assembly with Gears (STEP)
Drawing 2 Stage Assembly Specs (PDF)
3 Stage Assembly Specs (PDF)
Ball Shifter Mounting Bracket Detail Drawing (PDF)
Weight 2-Stage: 2.50 lbs with pneumatic cylinder, no motors
3-Stage: 3.05 lbs with pneumatic cylinder, no motors