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We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
The MAXPlanetary System (REV-21-2100) 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, NEO 550, Falcon 500, and 775 motors. 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.
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
The REV Robotics MAXPlanetary System includes the following features:
Three different, self-contained gear ratio cartridges providing twenty-seven gear ratios ranging from 3:1 to 125:1
High torque density
Easy assembly without modifying the motor
A Socket 1/2in Hex Output with the ability to retain a shaft blind
Assembled front to back for ease of changing the gear ratio while the MAXPlanetary Gearbox is mounted on the robot
Input Spline - Accepts torque from the previous stage while being easy to insert and remove.
Output Spline - Provides torque transfer between one stage and the next while being easy to insert and remove.
Assembly Holes - The screws holding the gearbox together pass through these holes.
Shields - Keeps the internal components of the gear stage in their place when the stage isn’t assembled into a gearbox. Also retains grease to keep the gear stage lubricated throughout its service life.
Alignment Tabs - Alignment features that engage with the alignment notches on the previous stage. The directional nature of the alignment features prevent the user from assembling any gearbox components backwards.
Alignment Notches - Provides a socket for the alignment tabs to engage with. These features keep the rotating components concentric as well as providing angular alignment to keep the flat faces of the gearbox in plane.
Side Mounting Holes - These 10-32 holes allow the gearbox to be mounted on top of structural components without obstructing the front of the gearbox.
Assembly Holes - The screws holding the gearbox together pass through these holes.
Alignment Notches - Provides a socket for the alignment tabs on the first gear stage to engage with. These features keep the rotating components concentric as well as providing angular alignment to keep the flat faces of the gearbox in plane.
NEO Mounting Holes - These holes are for mounting NEO-class motors to the input block.
550 Mounting Holes - These holes are for mounting the NEO 550 to the gearbox.
775 Mounting Holes - These holes are for mounting 775-series motors to the gearbox
775 Vent Holes - These holes line up with the vent holes on the face of 775-series motors and allow cooling air to pass through the motor.
Socket 1/2in Hex Output - Engages with a 1/2in hex shaft to drive a robot mechanism. The output includes a #10 clearance hole through the middle which allows a shaft to be retained in the output.
Face Mounting Holes - These 10-32 holes allow the gearbox to be mounted to the face of a bracket or tube in several useful orientations.
Side Mounting Holes - These 10-32 holes allow the gearbox to be mounted on top of structural components without obstructing the front of the gearbox.
Threaded Assembly Holes - The screws holding the gearbox together thread into these holes to clamp the gearbox stack together.
Input Spline - Accepts torque from the last gear stage while being easy to insert and remove.
Alignment Tabs - Alignment features that engage with the alignment notches on the last stage. The directional nature of the alignment features prevent the user from assembling any gearbox components backwards.
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
For assembly you will need a 5/32" Allen Wrench.
If your robot requires shaft retention in the gearbox, follow the Shaft Retention Assembly instructions now before proceeding.
When building your gearbox make sure the highest gear reduction is closest to the motor.
1) Place the Universal Input Stage on the motor.
2) Align two of the mounting holes on the motor with the holes in the input stage.
3) Insert the 1/2in long 10-32 Socket Head Cap Screws in the motor mounting holes and tighten them down.
Note: It is a best practice to spin both screws all the way into the holes without tightening them and then alternate between tightening the two screws to snug them up.
4) Insert the 2mm key in the motor shaft keyway.
Note: The key should be located as close to the motor as the keyway will allow.
5) Align the key with the keyway in the Input Coupler.
6) Slide the Input Coupler on the motor shaft. Ensure that the key is engaged and the Input Coupler has been slid all the way against the motor.
7) Place the appropriate gear cartridge on the 1/2" Hex Socket Output.
Note: The cartridge may need to be rotated to get the splines to line up. Once the splines are inserted continue to rotate the cartridge to ensure that the alignment features are completely engaged.
8) Continue stacking gear cartridges backwards towards the motor in the appropriate order.
Note: Ensure that the alignment features of each cartridge are properly engaged with the cartridges next to it.
9) Align the stacked output stage and gear cartridges with the input stage.
10a) Slide the stack of gear cartridges onto the motor shaft and input stage. Ensure that the input spline on the rear gear cartridge and the input coupler are properly engaged.
Note: This may require twisting by hand the gear cartridges slightly to line up the splines and then rotating back once the spline is engaged. Make sure the entire stack is pressed together and all alignment features are properly engaged.
10b) Gap - Having a gap in this location is bad. If a gap is present, it means that all alignment features are not properly engaged. This may require twisting by hand the gear cartridges slightly to line up the splines and then rotating back once the spline is engaged. Make sure the stack is fully seated and no gap is present before inserting and tightening the gearbox assembly screws
11) Insert the appropriate length of 10-32 Socket Head Cap Screws into the gearbox assembly holes
0 Cartridges: 1/2in Long Screws
1 Cartridge: 1in Long Screws
2 Cartridges: 1-1/2in Long Screws
3 Cartridges: 2in Long Screws
12) Tighten the gearbox assembly screws down.
Note: It is a best practice to spin both screws all the way into the holes without tightening them and then alternate between tightening the two screws to snug them up.
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
All 10-32 Screws used for Assembly and Mounting
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
Side Mounting Holes are on a 0.5in pitch regardless of number of stages
775pro or AM RedLine
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
For assembly you will need a 5/32" and 3mm Allen Wrench.
When building your gearbox make sure the highest gear reduction is closest to the motor.
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
For assembly you will need a 5/32" and 2.5mm Allen Wrench
When building your gearbox make sure the highest gear reduction is closest to the motor.
If your robot requires shaft retention in the gearbox, follow the instructions now before proceeding.
If your robot requires shaft retention in the gearbox, follow the instructions now before proceeding.
A full step by step guide on switching the shaft on the Falcon can be found in the and once completed, follow the instructions and then follow the (Note: the Falcon 500 User Guide link above is hosted outside the REV Robotics documents site)
1) Press the adapter shaft onto the 775 motor shaft. Note: Make sure the adapter shaft and motor shaft are perfectly aligned in order to prevent damage to the motor. |
2) Place the spacer plate on the front of the motor. |
3) Place the motor and spacer plate onto the MAXPlanetary input block. |
4) Attach the motor to the input block with the 2 M4 screws. |
5) Place the shaft key in the keyway in the adapter shaft. |
6) Slide the input coupler all the way onto the adapter shaft. |
7) Place the appropriate gear cartridge on the 1/2" Hex Socket Output. Note: The cartridge may need to be rotated to get the splines to line up. Once the splines are inserted continue to rotate the cartridge to ensure that the alignment features are completely engaged. |
8) Continue stacking gear cartridges backwards towards the motor in the appropriate order. Note: Ensure that the alignment features of each cartridge are properly engaged with the cartridges next to it. |
9) Align the stacked output stage and gear cartridges with the input stage. |
10a) Slide the stack of gear cartridges onto the motor shaft and input stage. Ensure that the input spline on the rear gear cartridge and the input coupler are properly engaged. Note: This may require twisting the gear cartridges slightly to line up the splines and then rotating back once the spline is engaged. Make sure the entire stack is pressed together and all alignment features are properly engaged. |
10b) Gap - Having a gap in this location is bad. If a gap is present, it means that all alignment features are not properly engaged. This may require twisting by hand the gear cartridges slightly to line up the splines and then rotating back once the spline is engaged. Make sure the stack is fully seated and no gap is present before inserting and tightening the gearbox assembly screws |
11) Insert the appropriate length of 10-32 Socket Head Cap Screws into the gearbox assembly holes 0 Cartridges: 1/2in Long Screws 1 Cartridge: 1in Long Screws 2 Cartridges: 1-1/2in Long Screws 3 Cartridges: 2in Long Screws |
12) Tighten the gearbox assembly screws down. Note: It is a best practice to spin both screws all the way into the holes without tightening them and then alternate between tightening the two screws to snug them up. |
1) Press the adapter shaft onto the NEO 550 shaft. Make sure the adapter shaft and motor shaft are perfectly aligned in order to prevent damage to the motor. |
2) Place the spacer plate on the front of the motor. |
3) Place the motor and spacer plate onto the MAXPlanetary input block. |
4) Attach the motor to the input block with the 2 M3 screws. |
5) Place the shaft key in the keyway in the adapter shaft. |
6) Slide the input coupler all the way onto the adapter shaft. |
7) Place the appropriate gear cartridge on the 1/2" Hex Socket Output. Note: The cartridge may need to be rotated to get the splines to line up. Once the splines are inserted continue to rotate the cartridge to ensure that the alignment features are completely engaged. |
8) Continue stacking gear cartridges backwards towards the motor in the appropriate order. Note: Ensure that the alignment features of each cartridge are properly engaged with the cartridges next to it. |
9) Align the stacked output stage and gear cartridges with the input stage. |
10a) Slide the stack of gear cartridges onto the motor shaft and input stage. Ensure that the input spline on the rear gear cartridge and the input coupler are properly engaged. Note: This may require twisting the gear cartridges slightly to line up the splines and then rotating back once the spline is engaged. Make sure the entire stack is pressed together and all alignment features are properly engaged. |
10b) Gap - Having a gap in this location is bad. If a gap is present, it means that all alignment features are not properly engaged. This may require twisting by hand the gear cartridges slightly to line up the splines and then rotating back once the spline is engaged. Make sure the stack is fully seated and no gap is present before inserting and tightening the gearbox assembly screws |
11) Insert the appropriate length of 10-32 Socket Head Cap Screws into the gearbox assembly holes 0 Cartridges: 1/2in Long Screws 1 Cartridge: 1in Long Screws 2 Cartridges: 1-1/2in Long Screws 3 Cartridges: 2in Long Screws |
12) Tighten the gearbox assembly screws down. Note: It is a best practice to spin both screws all the way into the holes without tightening them and then alternate between tightening the two screws to snug them up. |
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
MAXPlanetary Base Kits purchased before 11/14/2022 included a MAXPlanetary CIM/Falcon Spacer (REV-21-2119) to ensure that the input stage for CIM, MiniCIM, and Falcon 500 motors sits correctly in the MAXPlanetary Gearbox. Please be sure to install the spacer before assembling your MAXPlanetary Gearbox and attaching the Input Stage to your motor.
The following steps are only required if you are using a CIM, MiniCIM, or Falcon Motor
MAXPlanetary Gearboxes purchased before 11/14/2022 use Version 1 of the MAXPlanetary Keyed Input Coupler and will need to install the included spacer to use a CIM, miniCIM, or Falcon 500. If your Keyed Input Coupler is a V1, the dimension highlighted in the drawing below will be 14.9mm or 0.59in.
MAXPlanetary Gearboxes purchased after 11/14/2022 use Version 1.1 the MAXPlanetary Keyed Input Coupler and do not need the spacer. If your Keyed Input Coupler is a V1.1, the dimension highlighted in the drawing below will be 14.4mm or 0.57in.
When using a Falcon Spline Input Coupler with your MAXPlanetary Gearbox you do not need to install the spacer.
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
The MAXPlanetary Base Kit comes with a 3in long rounded 1/2in hex shaft with a 10-32 tapped hole at either end. This shaft can be retained in the MAXPlanetary 1/2in Socket Hex Output with a screw installed from the back side before assembling the rest of the gearbox.
In addition to the included hex shaft, additional lengths of pre-tapped shaft are available from REV. Also, any length of team-provided 1/2in hex shaft (with or without rounded corners) can be retained in the output provided that it has a 10-32 tapped hole.
For assembly you will need a 1/8" Allen Wrench.
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
The MAXPlanetary is a modular planetary gearbox designed for use with NEO-class motors and is optimized for torque density. By following these tips and tricks, you can ensure that your gearbox is assembled properly and functions efficiently. With the help of this guide, you will be able to assemble your MAXPlanetary gearbox with confidence and ease.
Attempting to stack the Input Coupler onto the gear cartridges, rather than pressing the Input Coupler into the stack is often more difficult.
Keep in mind that it may require a decent amount of force to couple the gearbox stack with the motor- it is not expected to be a slip-fit.
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
Gearbox ultimate strength - Failure at 180 NM +/- 5%
Please note that this is less than the MAXPlanetary Gearbox can withstand!
1) Place the MAXPlanetary CIM/Falcon Spacer onto your motor.
2) Align two of the mounting holes on the motor with the holes in the spacer.
1) Line up the hex of the shaft and the output block.
2) Insert the hex shaft in the output. Ensure that the shaft bottoms out in the socket.
Note: If the shaft has been cut, ensure that any burrs have been removed from the cut end, so that the shaft will fit in the output properly.
3) Apply thread-locking compound to the 1/2in long Button Head Cap Screw (included in the MAXPlanetary Base Kit or Hardware Kit).
Note: We recommend Loctite 243 (commonly known as “Blue Loctite”).
*not to scale
4) Insert the button head screw into the back side of the output.
Note: This is typically easiest with a hex key or t-handle WITHOUT a ball end.
5) Tighten down the screw into the threads in the end of the output shaft.
1) Place the motor with the motor shaft and Universal Input Stage facing upwards.
2) Slide the Input Coupler on the motor shaft. Ensure that the key is engaged and the Input Coupler has been slid all the way against the motor.
3) Take your stacked output stages and gear cartridges and align them with the Universal Input Stage.
4) Slide the stack of gear cartridges onto the motor shaft and input stage. Ensure that the input spline on the rear gear cartridge and the input coupler is properly engaged.
Note: This may require twisting the gear cartridges by hand slightly to line up the splines, and then rotating back once the spline is engaged. Make sure the entire stack is pressed together and all alignment features are properly engaged.
5) Make sure the stack is fully seated and no gap is present between the stack and the input plate before inserting and tightening the gearbox assembly screws.
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
The REV Robotics MAX 90 Degree Gearbox contains the following features:
Compatible with MAX Pattern
All metal construction
Socket 1/2in hex input
Through bore 1/2in hex output
Materials:
Body: Aluminum 6061
Gears, Shafts, & Adapter: Steel
Weight:
Gearbox: 312.5g (0.69lb)
Adapter: 15.0g (0.03lb)
SKU
DESCRIPTION
QTY.
REV-21-2120-P01
MAX 90 DEGREE GEARBOX OUTPUT SHAFT
1
REV-21-2120-P02
MAX 90 DEGREE OUTPUT SHAFT BEVEL GEAR
1
REV-21-2120-P03
MAX 90 DEGREE GEARBOX INPUT SHAFT
1
REV-21-2120-P04
MAX 90 DEGREE GEARBOX SIDE PLATE
2
REV-21-2120-P05
MAX 90 DEGREE GEARBOX BOTTOM PLATE
1
REV-21-2120-P06
MAX 90 DEGREE GEARBOX MIDDLE PLATE
1
REV-21-2120-P07
MAX 90 DEGREE GEARBOX STANDOFF
2
REV-21-2125
MAX 90 DEGREE GEARBOX BEARING PACK
1
REV-21-2126
MAX 90 DEGREE GEARBOX HARDWARE PACK
1
REV-21-2122
MAXPLANETARY SPLINE TO 1/2IN HEX ADAPTER
1
1) Install one of the Flanged Bearings in the Bottom Block.
2) Install the Input Gear into the bearing.
3) Set the Middle Plate so that the bearing counterbore is facing up. Insert the small bearing into the Middle Plate.
4) Place the bearing and Middle Plate upside down on top of the Input Gear.
1) Install the Flanged Bearings in the two Side Plates. The bearing flange should be on the opposite side of the plate from the counterbores.
2) Install the two Standoffs into one of the Side Plates with two 3/8in long 10-32 button head screws.
3) Insert the through bore shaft into the bearing in the Side Plate with the Standoffs. The end of the shaft with hex should be facing away from the Side Plate.
4) Turn the bottom stack on its side and set it on the Side Plate so that the Middle Plate slots into the notches in the Side Plate. The edges of the Bottom Plate should be flush with the Side Plate.
5) Slide the Bevel Gear onto the through bore shaft.
6) Drop the second Side Plate and bearing onto the end of the through bore shaft.
7) Install four 3/8in long 10-32 button head screws through the Side Plate into the Standoffs and the Bottom Plate. Leave these screws slightly loose.
8) Flip the gearbox over and install the remaining two 3/8in long 10-32 button head screws through the Side Plate into the Bottom Plate. Leave these screws slightly loose. Optional Step: How to use MAX 90 Degree Gearbox Assembly Wedges to optimize your build.
9) Spin the gearbox a few times and then tighten all screws. Spin the gearbox afterwards to ensure it spins smoothly.
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
To help teams properly align their Bevel Gear while assembling the MAX 90 Degree Gearbox we developed an Assembly Wedge tool. This tool can be 3D printed and reused to assemble multiple MAX 90 Degree Gearboxes.
1) With all screws in the MAX 90 Degree Gearbox installed slightly loose, insert an Assembly Wedge on either side of the gearbox ensuring the flat side of the wedge is in contact with the bottom plate.
2) While applying pressure to both Assembly Wedges, tighten the screws in the MAX 90 Degree Gearbox on alternating sides. Use the image below as a guide for tightening the screws.
3) Once all of the screws are secure, remove the Assembly Wedges and spin the gearbox to ensure it moves smoothly.
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
The REV Robotics MAXPlanetary comes with the gearbox deconstructed allowing for the user to modify the total reduction needed for the application. Each cartridge is pre-assembled and lubricated allowing for easier customization. Below are links to steps for assembling a two-stage gearbox for specific motors.
MAXPlanetary Gearboxes purchased before 11/14/2022 will need to install the included spacer to use a CIM, miniCIM, or Falcon 500. Follow the Spacer Installation Guide now before proceeding to the other steps. If you are unsure if a spacer is needed for your MAXPlanetary Gearbox, you can find more information about the changes in the When to use a Spacer section.
NEO and CIM motors- Assembly Instructions
NEO 550 and 550 sized motors - Assembly Instructions
We're Updating our Documentation! For the most up-to-date information about the REV ION Gearboxes and other products in the ION Build System please check out the following new documentation pages:
The following torque measurements are for a static load condition. The torques listed are for the output of the stage.
Shock loads can cause the gearbox to fail in situations where the steady-state torque is still within allowable limits.
Cantilevered load on the output shaft puts additional stress on the gearbox and will reduce the torque the gearbox can withstand.
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.
Cartridge | Torque |
---|---|
3:1 Cartridge
Tested to 290 N⋅m (no failure)
4:1 Cartridge
Fails at 270 N⋅m
5:1 Cartridge
Fails at 240 N⋅m
1/2" Hex Socket Output
Fails at 250 N⋅m