> For the complete documentation index, see [llms.txt](https://docs.revrobotics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.revrobotics.com/duo-build/ftc-starter-kit-gear-drivetrain/gear-idler-assembly.md).
# Gear Idler Assembly
## Gear Idler Assembly Parts Required
| **PART NUMBER** | **DESCRIPTION** | **QTY.** |
| ------------------------------------------------------- | --------------------- | -------- |
| [REV-41-1322](https://www.revrobotics.com/rev-41-1322/) | END CAP BEARING | 2 |
| [REV-41-1323](https://www.revrobotics.com/rev-41-1323/) | 15MM SPACER | 1 |
| [REV-41-1327](https://www.revrobotics.com/rev-41-1327/) | SHAFT COLLAR | 1 |
| [REV-41-1336](https://www.revrobotics.com/rev-41-1336/) | 72 TOOTH PLASTIC GEAR | 1 |
| [REV-41-1347](https://www.revrobotics.com/rev-41-1347/) | 5MM X 75MM HEX SHAFT | 1 |
## Gear Idler Assembly Steps
| | |
| ------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 
| Add an End Cap Bearing to the 75mm x 5mm Hex Shaft. |
| 
| Slide a Shaft Collar onto the shaft. Tighten the set screw.
Note: the Shaft Collar should be flush with the bearing.
|
| 
| Slide a 15mm Spacer onto the shaft. |
| 
| Slide an 72 Tooth Plastic Gear onto the shaft |
| 
| Add an End Cap Bearing to the shaft.
Note: the smaller portion of the bearing faces away from the gear
|
| 
| GEAR IDLER ASSEMBLY COMPLETE.
Repeat the above steps until there are four completed Gear Idler Assemblies. Set aside for later.
|