> 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-mecanum-drivetrain/drive-shaft-assembly.md).
# Drive Shaft Assembly
### Mecanum Wheel Assembly Parts Required
| | | |
| ------------------------------------------------------- | ----------------------- | -- |
| [REV-45-1655](https://www.revrobotics.com/rev-45-1655/) | 75MM MECANUM WHEEL | 4 |
| [REV-41-1216](https://www.revrobotics.com/rev-41-1216/) | UNIVERSAL HEX ADAPTER | 4 |
| [REV-41-1359](https://www.revrobotics.com/rev-41-1359/) | M3 X 8MM HEX CAP SCREWS | 16 |
### Mecanum Wheel Assembly Steps
{% hint style="info" %}
The Universal Hex Adapter V2 ([REV-41-1833](https://www.revrobotics.com/rev-41-1833/)) can be substituted for the Universal Hex Adapter. 75mm Mecanum Wheel sets purchased after 1/10/2020 will include the Universal Hex Adapter V2.
{% endhint %}
| | |
| ------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| 
| Add the Universal Hex Adapter to the Mecanum Wheel using four 8mm x M3 Screws |
| 
| MECANUM WHEEL ASSEMBLY COMPLETE
Repeat the above step until you have four Mecanum Wheel Assemblies.
|
### Drive Shaft Assembly Parts Required
| **PART NUMBER** | **DESCRIPTION** | **QTY.** |
| ------------------------------------------------------- | ---------------------------- | -------- |
| [REV-41-1324](https://www.revrobotics.com/rev-41-1324/) | 3MM SPACER | 3 |
| [REV-41-1323](https://www.revrobotics.com/rev-41-1323/) | 15MM SPACER | 2 |
| [REV-41-1326](https://www.revrobotics.com/rev-41-1326/) | THROUGH BORE BEARING - SHORT | 2 |
| [REV-41-1329](https://www.revrobotics.com/rev-41-1329/) | THROUGH BORE BEARING - LONG | 1 |
| [REV-41-1327](https://www.revrobotics.com/rev-41-1327/) | SHAFT COLLAR | 1 |
| [REV-41-1348](https://www.revrobotics.com/rev-41-1348/) | 5MM X 90MM HEX SHAFT | 1 |
| | **ASSEMBLIES** | |
| [ASSEMBLY 3](#mecanum-wheel-assembly-steps) | MECANUM WHEEL ASSEMBLY | 2 |
### Drive Shaft Assembly Steps
| | |
| ------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| 
| Add a Shaft Collar flush to the end of the 5mm x 90mm Hex Shaft.
Tighten the Shaft Collar.
|
| 
| Slide a Mecanum Wheel Assembly onto the shaft.
Note: For now the Mecanum Wheels are being used to get correct spacing. Whether it is a Left or Right Mecanum Wheel is not important at this time.
|
| 
| Slide a 3mm Spacer onto the shaft. |
| 
| Slide a Through Bore Bearing – Long onto the shaft.
Note: the longer portion of the bearing faces towards the Shaft Collar.
|
| 
| Slide a Through Bore Bearing – Short onto the shaft.
Note: the smaller portion of the bearing faces towards the Shaft Collar.
|
| 
| Slide a 3mm Spacer onto the shaft. |
| 
| Slide a 15mm Spacer onto the shaft. |
| 
| Slide a 15mm Spacer onto the shaft. |
| 
| Slide a 3mm Spacer onto the shaft. |
| 
| Slide a Through Bore Bearing – Short onto the shaft.
Note: the smaller portion of the bearing faces away from the Shaft Collar.
|
| 
| DRIVE SHAFT ASSEMBLY COMPLETE
Repeat the above steps until there are two completed Drive Shaft Assemblies. Set aside for later.
|