# Extrusion Chain Drivetrain

This section outlines the steps required to build a four-wheel, extrusion-based chain drivetrain using parts from the FTC Starter Kit V3 ([REV-45-1883](https://www.revrobotics.com/rev-45-1883/)). This design is a good starting point. However, modification maybe required to address the specific needs of the robot being designed. This design is flexible, allowing for different wheel types depending on the overall requirements of the drive train. 

The assembly of this drivetrain is broken into a few sections. This allows for a team of people to work on different tasks to complete the build quicker. Each section begins with what parts and the quantity of parts needed to complete the steps in that section. A list of required materials for all sections is listed below.

![](/files/-MCEU1t9ii0z_KcJyoRj)

### Kit Options

The Extrusion Chain Drivetrain is built out of the following kits:

#### FTC Starter Kit V3 Base

| Part Number                                             | Description        | QTY. |
| ------------------------------------------------------- | ------------------ | ---- |
| [REV-45-1883](https://www.revrobotics.com/rev-45-1883/) | FTC Starter Kit V3 | 1    |

#### FTC Starter Kit V2 Base

| Part Number                                             | Description            | QTY. |
| ------------------------------------------------------- | ---------------------- | ---- |
| [REV-45-1270](https://www.revrobotics.com/rev-45-1270/) | FTC Starter Kit V2     | 1    |
| [REV-45-1884](https://www.revrobotics.com/rev-45-1884/) | V2 To V3 Update Bundle | 1    |

### Full Bill of Materials

| **PART NUMBER**                                         | **DESCRIPTION**                           | **QTY.** |
| ------------------------------------------------------- | ----------------------------------------- | -------- |
| [REV-41-1432](https://www.revrobotics.com/rev-41-1432/) | 15MM EXTRUSION - 420MM                    | 6        |
| [REV-41-1431](https://www.revrobotics.com/rev-41-1431/) | 15MM EXTRUSION - 225MM                    | 4        |
| [REV-41-1348](https://www.revrobotics.com/rev-41-1348/) | 5MM X 90MM HEX SHAFT                      | 4        |
| [REV-41-1325](https://www.revrobotics.com/rev-41-1325/) | 1.5MM SPACER                              | 4        |
| [REV-41-1324](https://www.revrobotics.com/rev-41-1324/) | 3MM SPACER                                | 12       |
| [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              | 6        |
| [REV-41-1329](https://www.revrobotics.com/rev-41-1329/) | THROUGH BORE BEARING - LONG               | 2        |
| [REV-41-1327](https://www.revrobotics.com/rev-41-1327/) | SHAFT COLLAR                              | 4        |
| [REV-41-1338](https://www.revrobotics.com/rev-41-1338/) | 15 TOOTH #25 SPROCKET                     | 4        |
| [REV-41-1340](https://www.revrobotics.com/rev-41-1340/) | 20 TOOTH #25 SPROCKET                     | 4        |
| [REV-41-1365](https://www.revrobotics.com/rev-41-1365/) | #25 ROLLER CHAIN - 10 FT                  | 1        |
| [REV-41-1190](https://www.revrobotics.com/rev-41-1190/) | 90MM OMNI WHEEL                           | 2        |
| [REV-41-1354](https://www.revrobotics.com/rev-41-1354/) | 90MM TRACTION WHEEL                       | 2        |
| [REV-41-1317](https://www.revrobotics.com/rev-41-1317/) | 15MM BEARING PILLOW BLOCK                 | 8        |
| [REV-41-1321](https://www.revrobotics.com/rev-41-1321/) | 15MM PLASTIC LAP CORNER BRACKET           | 16       |
| [REV-41-1320](https://www.revrobotics.com/rev-41-1320/) | 15MM PLASTIC INSIDE CORNER BRACKET        | 8        |
| [REV-41-1623](https://www.revrobotics.com/rev-41-1623/) | ULTRAPLANETARY BENT MOUNTING BRACKET      | 2        |
| [REV-41-1624](https://www.revrobotics.com/rev-41-1624/) | ULTRAPLANETARY FLAT MOUNTING BRACKET      | 2        |
| [REV-41-1600](https://www.revrobotics.com/rev-41-1600/) | ULTRAPLANETARY GEARBOX KIT & HD HEX MOTOR | 2        |
| [REV-41-1846](https://www.revrobotics.com/rev-45-1883/) | MOTION PATTERN SPACER                     | 1        |
| [REV-41-1359](https://www.revrobotics.com/rev-41-1359/) | M3 X 8MM HEX CAP SCREWS - 100 PACK        | 2        |
| [REV-41-1360](https://www.revrobotics.com/rev-41-1360/) | M3 X 16MM HEX CAP SCREWS - 100 PACK       | 1        |
| [REV-41-1361](https://www.revrobotics.com/rev-41-1361/) | M3 NYLOC NUTS - 100 PACK                  | 2        |


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