MAXPlanetary System Kit

SKU:
REV-21-2100
$119.00

The MAXPlanetary System is a cartridge-based modular planetary gearbox designed from the ground up for NEO-class motors. The design of the MAXPlanetary has been carefully optimized to provide torque density unavailable in FRC up until now.

The MAXPlanetary is intended for use with the NEO, Falcon 500, and CIM motors. It also supports NEO 550 and 775 size motors (775pro or AM RedLine). Building on the ability to iterate and adjust designs easily, the MAXPlanetary System consists of lubricated cartridges allowing for swapping gear ratios on the fly and with ease. Users can configure a single-stage planetary using one of three different reduction cartridges or build multi-stage gearboxes through stacking individual cartridges together. The user can use the included 1/2in hex shaft or use a custom length of hex shaft best suited for the application. The gearbox also provides two mounting options, face mount and side mount, for ultimate flexibility in your robot design.

The REV MAXPlanetary Base Kit is the entry point into using the REV MAXPlanetary System. This kit includes a universal input stage, 1/2in hex socket output, hardware pack, 8mm keyed input coupler kit, 1/2in rounded hex shaft, and a CIM/Falcon spacer. Select a gear ratio kit to determine the right amount of torque for the application at hand. Add a NEO Brushless Motor or an adapter kit if you want to use a different motor. 

Features

  • 3:1, 4:1, and 5:1 Gear Stages
  • Socket 1/2in Hex Output
    • Ability to retain a shaft blind with a 10-32 screw
  • Compatible with NEO/CIM/Mini CIM (without modifying the shaft)
    • Keyed Input (no set screws)
  • Adapters available for NEO 550 and 775 size motors (775pro or AM RedLine)
    • Press-fit adapters (no set screws)
  • Adapter available for Falcon 500
  • Entirely self-contained Cartridge Gear Stages
  • All 10-32 Screws used for Assembly and Mounting
  • Assembled/Disassembled from the Rear
    • The gear ratio can be changed while the gearbox output is mounted to the robot
    • Hex key or t-handle clears the motor
  • Side Mounting Holes
    • Holes on the top and bottom
    • Holes are on a 0.5in pitch regardless of number of stages
  • 10-32 Face Mounting Holes on a 2in Bolt Circle with 2 Orientations
  • 2in Gearbox Height
    • Gearbox does not protrude above or below common FRC structural tubes
    • Output shaft stays on 1.0in pitch when the gearbox is mounted using the side holes

Specifications

  • Gearbox Dimensions:
    • Height: 2.000in
    • Width: 2.438in
    • Length (No Motor):
      • 0-Stage: 1.500in
      • 1-Stage: 2.000in
      • 2-Stage: 2.500in
      • 3-Stage: 3.000in
  • Weight:
    • Base kit (no shaft): 261g (0.576lb)
    • 3:1 gear stage: 155g (0.342lb)
    • 4:1 gear stage: 133g (0.294lb)
    • 5:1 gear stage: 138g (0.303lb)
    • 3in Output Shaft: 27g (0.059lb)
  • Exact Gear Ratios:
    • 3:1 Stage: 3:1
    • 4:1 Stage: 4:1
    • 5:1 Stage: 5:1
  • Gear Pitch: 0.65 Module
  • Pressure Angle: 20°
  • Ring Gear Tooth Count: 72
  • Face Mounting Pattern: 10-32 on a 2in Bolt Circle
  • Output Socket: 1/2in Hex, 0.438in Deep
  • Included Shaft: 1/2in Hex, 3.000in Long

Static Load Ratings

The following torque measurements are for a static load condition (i.e. not moving).  The torques listed are for the output of the stage.

  • 3:1 Cartridge - Tested to 290Nm [2567in*lbs] (no failure)
  • 4:1 Cartridge - Fails at 270Nm [2390in*lbs]
  • 5:1 Cartridge - Fails at 240Nm [2124in*lbs]
  • 1/2" Hex Socket Output - Fails at 250Nm [2213in*lbs]

NOTE: Cantilevered (sideways) load on the output shaft puts additional stress on the gearbox and will reduce the torque the gearbox can take.  In addition, shock loads can cause the gearbox to fail in situations where the steady-state torque is still within allowable limits.

Allowed Stage Configurations

The following chart shows which gear cartridge configurations are allowable with different motors.  Cells shown in GREEN are allowed and cells shown in RED are not allowed.

These ratings are based on the default current limit on the Spark MAX (or Talon FX).  Increasing the current limit increases the maximum torque the motor can produce and may put components of the gearbox outside of their load rating.

 maxplanetary-load-ratings.png

Kit Contents *the following items may or may not be included based on your product selection

Base Kit

 SKU   PRODUCT NAME   QUANTITY 
  REV-21-2104   MAXPlanetary 1/2" Hex Socket Output   QTY 1 
  REV-21-2106   MAXPlanetary Universal Input Stage   QTY 1 
  REV-25-2107   MAXPlanetary Hardware Pack   QTY 1  
  REV-21-2108   MAXPlanetary 8mm Keyed Input Coupler Kit   QTY 1 
  REV-21-2813   1/2in Rounded Hex Shaft, 3.0in Long, Tapped   QTY 1 
  REV-21-2119   MAXPlanetary CIM/Falcon Spacer   QTY 1 

Gear Ratio Kit

Each ratio kit includes a combination of the following cartridges:

 SKU   PRODUCT NAME 
 REV-21-2101  MAXPlanetary 3:1 Cartridge
 REV-21-2102  MAXPlanetary 4:1 Cartridge
 REV-21-2103   MAXPlanetary 5:1 Cartridge

MAXPlanetary 775 Input Kit

 SKU   PRODUCT NAME   QUANTITY 
  REV-21-2116  MAXPlanetary Universal Motor Input Spacer   QTY 1 
  REV-21-2118  775 MAXPlanetary Shaft Adapter   QTY 1 
  
 M4 x 12mm Socket Head Cap Screw   QTY 2  

MAXPlanetary 550 Input Kit

 SKU   PRODUCT NAME   QUANTITY 
  REV-21-2116  MAXPlanetary Universal Motor Input Spacer   QTY 1 
  REV-21-2117  NEO 550 MAXPlanetary Shaft Adapter   QTY 1 
  
 M3 x 10mm Socket Head Cap Screw   QTY 2   

Falcon 8mm Keyed Shaft

 SKU   PRODUCT NAME   QUANTITY 
  REV-21-2104   MAXPlanetary 1/2" Hex Socket Output   QTY 1 
  
 10-32 x 3/8in Socket Head Cap Screw   QTY 2  

Documentation

CAD