Gearboxes are a very common way to transform motion in FIRST Robotics Competition. They are generally compact and modular, able to be mounted on your robot wherever they’re needed. Some have fixed gear ratios, and some can be easily changed for the needed application.
A popular style of gearbox is the adjustable, modular, planetary gearbox. In this kind of planetary gearbox, cartridges of different gear ratios are stacked to create an overall reduction. This is a fantastic option for teams to prototype with because they can quickly change the gear ratio without needing to redesign the entire mechanism.
The 2 Motor Drivetrain Gearbox Through Bore (REV-21-2190) is compatible with the REV ION System and can be mounted in a variety of ways, including flush with tube or spaced to enable both chain in tube and chain/belt outside tube designs. Standard pre-formed mounts for a Through Bore Encoder (REV-11-1271) ensure the gearbox is on the same horizontal plane to help keep alignment frustrations to a minimum.
The 2 Motor Gearbox (REV-21-2099) Through Bore is compatible with the REV ION System. This two motor into one output gearbox allows the user to adjust the gear ratio by changing pinion and cluster gear (12:60, 18:54, 24:48, or 36:36). The output shaft is 1/2in Hex through bore, and output gears have a MAXSpline for compatibility.
The NEO Motor matches the design flexibility of other REV ION products with our optional MAXPlanetary Gearbox () The MAXPlanetary is primarily intended to be used with the NEO, NEO 550, Falcon 500, and 775 motors. For those utilizing a swerve drive in their build, the NEO Motor is also available with a straight shaft i.e. no gearbox.
The NEO 550 Motor matches the design flexibility of other REV ION products with our optional UltraPlanetary Gearbox (). This UltraPlanetary System is a cartridge-based modular gearbox designed to handle the rigors of the competition and the classroom. Building on the ability to iterate and adjust designs easily using the REV Building System, the UltraPlanetary System consists of pre-assembled and lubricated cartridges allowing for swapping gear ratios on the fly and with ease.
When your application demands the use of one of these gearboxes, the right choice may not be entirely clear. Here are two key points to consider when making your selection:
Form Factor - Which one of these will fit and mount comfortably in your use case?
Gear Ratio - How much gearing flexibility do you need out of these gearboxes?
This gearbox utilises two , allowing the user to adjust the gear ratio by changing the pinion and cluster gear to 36:36, 24:48, 18:54, 12:60, or 10:60. (1:1, 2:1, 3:1, 5:1, or 6:1)
In theory, this can also be used for a drivetrain, but its benefit of a narrow profile opens it up for compact applications.
This gearbox utilises two NEO V1.1 Brushless Motors, and can be mounted in a variety of options, including flush with MAXTube or spaced away from the tube to enable both chain-in-tube and chain/belt outside tube designs.
Profiling of this drivetrain is more vertical while still allowing it to be out of the way. Weight distribution is also something to consider if you were to implement this gearbox.
The user can adjust speed by switching pinion gears on the motor between 10T, 11T, 12T, or can adjust wheel size by switching 2nd stage gear pairs. 2 Pairs of 2in pitch #10-32 tapped holes are available on output shaft for mounting the REV Through Bore Encoder, and mount holes for the gearbox are on the same horizontal plane as the output, set 4 inches apart. The output shaft is 1/2in Hex through bore, and the output gears have a MAXSpline bore.
Allows user to adjust gear ratio by changing pinion and cluster gear (12:60, 18:54, 24:48, or 36:36)
Output shaft is 1/2in Hex through bore
Output gears have MAXSpline bore
REV-21-2190-P03
2 MOTOR DRIVETRAIN GEARBOX 1/2IN HEX CLUSTER SHAFT
1
REV-25-2489
2 MOTOR DRIVETRAIN GEARBOX SPACER PACK
1
REV-25-2488
2 MOTOR DRIVETRAIN GEARBOX HARDWARE PACK
1
REV-21-2079
1/2IN HEX THROUGH BORE SHAFT
1
REV-21-2819
1
REV-21-1916-PK2
FLANGED BEARING FOR 1/2IN ROUNDED HEX - 2 PACK
1
REV-21-1937
1
BEARING, 30MM ID, 42MM OD, 7MM THICK, SHIELDED, FLANGED - 2 PACK
1
REV-21-2190-P01
2 MOTOR DRIVETRAIN GEARBOX MOTOR PLATE
1
REV-21-2190-P02
2 MOTOR DRIVETRAIN GEARBOX OUTPUT PLATE
1
Output Plate has array of holes for mounting to structure, as well as mounting an input to MAXPlanetary
5:1 ratio can be micro-adjusted by swapping a 12T pinion for an 11T or 10T
2 MOTOR GEARBOX HARDWARE PACK
1
1:1
20DP GEAR- MAXSPLINE- 36T
20DP GEAR - 1/2IN HEX - 36T
2:1
Note that the 2 Motor Gearbox Base Kit does not come with Ratio Gear Bundles.
The following items may or may not be included based on your product selection. Selecting a Base Kit and Ratio Gear Bundle are both required to assemble a gearbox.
Each Ratio Gear Bundle comes with one MAXSpline Gear and two 1/2in Hex Bore Gears.
REV-21-2099-P01
2 MOTOR GEARBOX MOTOR PLATE
1
REV-21-2099-P02
2 MOTOR GEARBOX BEARING PLATE
1
2 MOTOR GEARBOX SPACER PACK
1
REV-21-2079
1/2IN HEX THROUGH BORE SHAFT
1
REV-21-1879
8MM TO 1/2IN HEX ADAPTER
2
BEARING, 30MM ID, 42mm OD, 7MM THICK, SHIELDED, FLANGED
2
20DP GEAR- MAXSPLINE- 48T
20DP GEAR- 1/2IN HEX- 24T
3:1
20DP GEAR- MAXSPLINE- 54T
20DP GEAR- 1/2IN HEX- 18T
5:1
20DP GEAR- MAXSPLINE- 60T
20DP NEO PINION GEAR- 12T
6:1
20DP GEAR- MAXSPLINE- 60T
20DP NEO PINION GEAR- 10T
