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2 CIM Ball Shifter

Highly compact 2 CIM version of our battle-tested two-speed transmission. Ball-lock shifter enables seamless “on-the-fly” shifting at full speed in a compact, light & durable package. Uses a long or short v2 shifter shaft.


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.

SKU: 2cimballshifter

Availability: Varies

$169.99
  • - In Stock
  • - Out Of Stock
  • - Backorder
Details
Description

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

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.


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.

CAD/Drawings

Details

P/NDescriptionMaterialCADDrawingsWeight
217-2428 2 CIM Ball Shifter - 2 Stage Gears: 7075-T6 Aluminum
CIM Pinion: 4140 Steel
Shafts: 7075-T6 Aluminum
Shifter Housing: Glass-Filled Nylon
STEP Gearbox
Mounting Bracket
Ball Shifter Mechanism
2.500 lbs
(No Motors)
217-2615 2 CIM Ball Shifter - 3 Stage Gears: 7075-T6 Aluminum
CIM Pinion: 4140 Steel
Shafts: 7075-T6 Aluminum
Shifter Housing: Glass-Filled Nylon
STEP Gearbox
Mounting Bracket
3rd Stage Output Shaft
Ball Shifter Mechanism
3.050 lbs
(No Motors)
 
217-2616 VEXpro Ball Shifter Housing Glass-Filled Nylon PDF 0.520 lbs
217-2793 VEXpro Ball Shifter Short Output Shaft with Gears Gears: 7075-T6 Aluminum
Shafts: 7075-T6 Aluminum
STEP PDF 0.608 lbs
217-2791 VEXpro Ball Shifter Short Output Shaft Shafts: 7075-T6 Aluminum PDF
217-2792 VEXpro Ball Shifter Long Output Shaft with Gears Gears: 7075-T6 Aluminum
Shafts: 7075-T6 Aluminum
STEP PDF 0.632 lbs
217-2751 Ball Shifter Hardware Kit Shaft: 7075-T6 Aluminum 0.116 lbs
217-4252 Ball Shifter Pneumatic Hardware Kit v2 Spacers: 7075-T6 Aluminum
Plate: 6061-T6 Aluminum
Shifter Cone: Glass-Filled Nylon
0.100 lbs
217-1718 VEXpro Ball Shifter Encoder Hardware Kit Gears: Glass-Filled Nylon
Plate: 6061-T6 Aluminum
Spacers: 7075-T6 Aluminum
0.076 lbs
How To
Additional Info
Kit Contents

2-Stage Ball Shifter:

  • (1) Ball Shifter Housing
  • (2) 12t CIM Motor Gear (Steel) w/ Mounting Hardware
  • (1) 24t Gear with 3/8" Hex
  • (1) 40t Gear with 3/8" Hex
  • (2) Flanged Bearing - 3/8" Round ID x 0.875" OD
  • (1) Flanged Bearing - 1/2" Round ID x 1.125" OD
  • (1) Flanged Bearing - 3/4" x 1 3/8" x .437"
  • (1) Ball Shifter Hardware Kit
  • (1) Ball Shifter Encoder Hardware Kit
  • (1) Ball Shifter Pneumatic Hardware Kit
  • (1) Ball Shifter Mounting Bracket

3-Stage:

  • (1) Ball Shifter Housing
  • (1) Ball Shifter 3rd Stage Plate
  • (1) Ball Shifter 3rd Stage Output Shaft
  • (2) 12t CIM Motor Gear (Steel) w/ Mounting Hardware
  • (1) 24t Gear with 3/8" Hex
  • (1) 40t Gear with 3/8" Hex
  • (2) Flanged Bearing - 3/8" Round ID x 0.875" OD
  • (1) Flanged Bearing - 1/2" Round ID x 1.125" OD
  • (1) Flanged Bearing - 3/4" x 1 3/8" x .437"
  • (1) Ball Shifter Hardware Kit
  • (1) Ball Shifter 3rd Stage Bearing & Hardware Kit
  • (1) Ball Shifter Encoder Hardware Kit
  • (1) Ball Shifter Pneumatic Hardware Kit
  • (1) Ball Shifter Mounting Bracket
Outputs 1/2" Hex
Specification Gears require lubrication. We recommend white lithium grease or DuPont Teflon Non-Stick Dry-Film Lubricant