Home > VEXpro > Gears & Gearboxes > 3 CIM Ball Shifter

As the name implies, the new 3 CIM Ball Shifter provides mounting locations for up to 3 CIM-style motors (or gearboxes with this same mounting pattern). This allows FRC teams to build drivetrains and mechanisms with even more power. Thanks to customer feedback, we've incorporated a number of subtle improvements into the 3 CIM Ball Shifter to ensure it is built for rigorous FRC competition.

This gearbox provides the same Ball-Lock shifting method as the original Ball Shifter, but also allows users to change the shifting spread between high & low gears. This gearbox has three different shifter spreads: 2.16x, 2.65x, and 3.68x.

This new gearbox features a lightweight plastic housing that includes the standard VEXpro mounting features for face mounting. In addition, it has hex-nuts embedded in its sides which also allow for edge mounting. The housing also includes internal features which will keep motor screws from dropping inside the gearbox while they’re being installed.

The 3 CIM Ball Shifter comes standard as a 2-stage gearbox, but includes options for designers to include a 3rd gear stage for larger reductions; in this setup designers can also customize the overall gearbox ratio by choosing between four different 3rd stage gearsets (64:20, 60:24, 54:30, 50:34).

The 3rd stage output plate is shaped to allow for configurations in which wheels are directly mounted on the gearbox output shaft. This makes this gearbox well suited for West Coast-style drivetrains.

  • Designed for up to 3 CIM-style motors or gearboxes
  • Ball-lock shifter method enables smooth shifting, even at full speed
  • Housing is completely enclosed - keeps metal chips out, grease in
  • Face mount using standard mounting holes
  • Side mount using the embedded hex nuts for a easier integration into your design
  • Includes all hardware to mount US Digital or Grayhill Encoder
  • Assembly Required, see instructions below
  • Encoders, Motors, Cylinder not included
Sort By:
Page of 1
3 CIM Ball Shifter + 3rd Stage (No Cylinder)

Our Price: $132.99
In Stock
Qty Add
3 CIM Ball Shifter + WCD 3rd Stage (No Cylinder)

Our Price: $132.99
In Stock
Qty Add
3 CIM Ball Shifter 3rd Stage Hardware Kit

Our Price: $12.99
In Stock
Qty Add
3 CIM Ball Shifter 3rd Stage Kit

The 3 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
Qty Add
3 CIM Ball Shifter Gearbox (No Cylinder)

Our Price: $109.99
In Stock
Qty Add
3 CIM Ball Shifter Hardware Kit

Our Price: $5.99
In Stock
Qty Add
3 CIM Ball Shifter WCD 3rd Stage Hardware Kit

Our Price: $12.99
In Stock
Qty Add
3 CIM Ball Shifter WCD 3rd Stage Kit

The 3 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
Qty Add
3 CIM Ball Shifter WCD 3rd Stage Kit (for #35 Chain)

The VEXpro 3 CIM Ball Shifter provides three different shifter spread options to teams. These options were chosen specifically 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.

The three options provided allow teams to find a balance which makes their high gear as fast as they want it, and gives their low gear as much torque they need.


Our Price: $27.99
In Stock
Qty Add
Long Shifter Shaft 2.16 Ratio Spread

Our Price: $51.99
In Stock
Qty Add
Long Shifter Shaft 2.16 Ratio Spread Kit

Our Price: $44.98
Qty Add
Long Shifter Shaft 2.65 Ratio Spread

Our Price: $50.99
In Stock
Qty Add
Long Shifter Shaft 2.65 Ratio Spread Kit

Our Price: $44.98
Qty Add
Long Shifter Shaft 3.68 Ratio Spread

Our Price: $39.99
In Stock
Qty Add
Long Shifter Shaft 3.68 Ratio Spread Kit

Our Price: $44.98
Qty Add
Pancake Pneumatic Cylinder, 3/4" Bore, 1/2" Travel

Our Price: $39.99
(Out of Stock)
Qty Add
Short Shifter Shaft 2.16 Ratio Spread

Our Price: $51.99
In Stock
Qty Add
Short Shifter Shaft 2.65 Ratio Spread

Our Price: $50.99
In Stock
Qty Add
Short Shifter Shaft 2.65 Ratio Spread Kit

Our Price: $44.98
Qty Add
Short Shifter Shaft 3.68 Ratio Spread

Our Price: $39.99
In Stock
Qty Add
Short Shifter Shaft 3.68 Ratio Spread Kit

Our Price: $44.98
Qty Add
To add the above items to your cart, click the "Add" checkboxes then click "Add To Cart" >>>
   
 

3 CIM Ball Shifter Reduction Stage

/ Initial Stage: 50:12
High Gear Stage: 34:50

Low Gear Stage Option 1 (2.16x Shifter Spread): 50:34
Low Gear Stage Option 1 (2.65x Shifter Spread): 54:30
Low Gear Stage Option 1 (3.68x Shifter Spread): 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

3 CIM Ball Shifter Overall Reductions


The VEXpro 3 CIM Ball Shifter provides three different shifter spread options to teams. These options were chosen specifically 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.

The three options provided allow teams to find a balance which makes their high gear as fast as they want it, and gives their low gear as much torque they need.

Technical Specifications

Kit Contents
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 3 CIM Ball Shifter 2 Stage with Grayhill Encoder
3 CIM Ball Shifter 2 Stage with US Digital Encoder
3 CIM Ball Shifter Base Kit with 3rd Stage
3 CIM Ball Shifter Base Kit with WCD 3rd Stage
Short Shifter Shaft 2.16 Ratio Spread
Short Shifter Shaft 2.65 Ratio Spread
Short Shifter Shaft 3.68 Ratio Spread
Long Shifter Shaft 2.16 Ratio Spread
Long Shifter Shaft 2.65 Ratio Spread
Long Shifter Shaft 3.68 Ratio Spread
Weight Need Weights