> ## Documentation Index
> Fetch the complete documentation index at: https://docs.researchanddesire.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Bill of Materials

> Complete hardware list for building the standard OSSM with stand

This page contains the complete bill of materials for building a standard OSSM with the 3030 extrusion stand.

<Info>
  For PitClamp-specific hardware, see the [PitClamp BOM](/ossm/Hardware/standard-printed-parts/pitclamp/BOM).
</Info>

## Actuator

The actuator is the core linear motion assembly of the OSSM.

### Motor

| Quantity | Part               |
| -------- | ------------------ |
| 1        | 57AIM30 Gold Motor |

### Linear Motion

| Quantity | Part                                 |
| -------- | ------------------------------------ |
| 1        | MGN12H Linear Rail (350mm suggested) |

<Info>
  Calculate your rail length using this formula: **desired maximum stroke + 180mm**. A 350mm rail is suggested for most builds.
</Info>

### Belt and Pulley

| Quantity | Part                                  |
| -------- | ------------------------------------- |
| 1        | GT2 20T Pulley (8mm bore, 10mm width) |
| 500mm    | GT2 Timing Belt (10mm width)          |

### Bearings

| Quantity | Part                            |
| -------- | ------------------------------- |
| 6        | MR115-2RS 5x11x4mm Ball Bearing |

### M3 Hardware

| Quantity | Part                          |
| -------- | ----------------------------- |
| 18       | M3x8mm Socket Cap Head Screw  |
| 3        | M3x20mm Socket Cap Head Screw |
| 10       | M3 Hex Nut                    |

### M4 Hardware

| Quantity | Part                          |
| -------- | ----------------------------- |
| 2        | M4x25mm Socket Cap Head Screw |
| 3        | M4 Hex Nut                    |

### M5 Hardware

| Quantity | Part                          |
| -------- | ----------------------------- |
| 6        | M5x20mm Socket Cap Head Screw |
| 4        | M5x35mm Socket Cap Head Screw |
| 8        | M5 Hex Nut                    |

### M6 Hardware

| Quantity | Part                          |
| -------- | ----------------------------- |
| 2        | M6x16mm Socket Cap Head Screw |
| 2        | M6 T-Nut (3030 profile)       |

### Printed Parts

| Quantity | Part                          |
| -------- | ----------------------------- |
| 1        | OSSM - Body - Middle          |
| 1        | OSSM - Body - Lower           |
| 1        | OSSM - Belt Clamp - Tensioner |
| 1        | OSSM - Belt Clamp - Top       |
| 1        | OSSM - Belt Clamp - Bottom    |
| 1        | OSSM - Body - Cover           |
| 1        | OSSM - 24mm Jam Nut           |
| 1        | OSSM - PCB Mount Base         |
| 1        | OSSM - PCB Mount Lid          |
| 1        | 57AIM Ring v1.1               |
| 1        | PitClamp v1.1 Lower Standard  |
| 1        | PitClamp v1.1 Upper + Handle  |
| 1        | PitClamp Dogbones Hex         |
| 1        | PitClamp Dogbones Round       |

***

## Stand (3030 Extrusion)

The stand provides a stable, adjustable mounting platform for the OSSM.

### Aluminum Extrusion

| Quantity | Length | Profile |
| -------- | ------ | ------- |
| 2        | 12"    | 3030    |
| 1        | 18"    | 3030    |
| 1        | 19.5"  | 3030    |

### Hardware - Bag 1

| Quantity | Part                        |
| -------- | --------------------------- |
| 14       | M6x12 Socket Cap Head Screw |
| 6        | M6x25 Socket Cap Head Screw |
| 16       | M6 Washer                   |
| 24       | M6 T-Nut (3030 profile)     |

### Hardware - Bag 2

| Quantity | Part           |
| -------- | -------------- |
| 2        | M6x25mm Handle |

### Hardware - Bag 3

| Quantity | Part                                 |
| -------- | ------------------------------------ |
| 4        | 90 Degree 3030 Corner Bracket        |
| 2        | Rubber Washer                        |
| 4        | Non-Slip Furniture Pad (Grippy Feet) |
| 6        | 3030 End Cap                         |

### Accessories

| Quantity | Part    |
| -------- | ------- |
| 1        | Sandbag |

<Note>
  A sandbag is recommended to add weight and stability to the stand during operation.
</Note>

### Printed Parts

| Quantity | Part               |
| -------- | ------------------ |
| 1        | OSSM Pivot Plate 1 |
| 1        | OSSM Pivot Plate 2 |
| 8        | OSSM Handle Spacer |
| 4        | OSSM Foot          |
| 2        | OSSM T Nut Support |

***

## Related Pages

<CardGroup cols={2}>
  <Card title="Actuator Overview" icon="gear" href="/ossm/Hardware/standard-printed-parts/actuator/introduction">
    Assembly instructions and detailed specifications
  </Card>

  <Card title="Stand Overview" icon="table-columns" href="/ossm/Hardware/standard-printed-parts/stand/introduction">
    Print settings and assembly guide
  </Card>

  <Card title="PitClamp BOM" icon="grip" href="/ossm/Hardware/standard-printed-parts/pitclamp/BOM">
    Hardware for the PitClamp mounting system
  </Card>

  <Card title="Build Guide" icon="book" href="/ossm/guides/getting-started/build-guide/step-1.0_required_tools_and_parts">
    Step-by-step build instructions
  </Card>
</CardGroup>