# SLAMTEC RPLIDAR A1M8 360° laser scanner: base outline, 4 mounting holes, scanning head and motor

> What are the SLAMTEC RPLIDAR A1M8 dimensions and mounting-hole positions?

- Category: Electronic components › Modules, sensors & displays
- Kind: Modern device
- Basis: SLAMTEC's official RPLIDAR A1M8 2D drawing, with the base outline, hole depths and under-plate parts taken from SLAMTEC's official 3D model.
- Page: https://xemstudio.com/objects/slamtec-rplidar-a1m8/ · JSON: https://xemstudio.com/api/geometry?object=slamtec-rplidar-a1m8 · Plain text: https://xemstudio.com/objects/slamtec-rplidar-a1m8/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 96.74 | 70.28 | 51.0 |

**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- Upright, lowest point (motor connector) at 0, top of the scanning head at 51.0. Base plate from 21.0 to 26.5 (5.5 thick); the rotating disc is Ø70.28 and the head Ø70.0.
- The head axis sits 35.14 from the head end of the 96.74 base; the Ø32 drive motor hangs below the plate, flush with the opposite end.
- Four Ø3.0 mounting holes through the base plate, each with a Ø5.0 × 2.0 counterbore at the plate top: 70.0 apart along the length, 56.0 apart across at the head end and 40.0 apart across at the motor end.
- Measured from the head axis, the head-end holes sit 28.0 toward the head end and the motor-end holes 42.0 toward the motor end.
- Modelled: base plate outline, holes, skirt and PCB under the plate (down to 15.0), motor and its connector, pulley, rotating disc and head. Not modelled: drive belt, plate ribs, head window and the loose cable.
- All dimensions are exact nominal millimetres, true size, with no tolerance added.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| Base mounting holes | 4 × Ø3.0, 70.0 × 56.0 / 40.0 trapezoid pattern | screws into a mounting plate or standoffs | designed | all |
| Head and disc clearance | Ø70.28 disc from 25.5 to 31.5, Ø70.0 head to 51.0 | sensor tower or cover cut-out around the rotating head | designed | all |

## Sizes

| hole | x from head axis (mm) | y (mm) | diameter (mm) |
|---|---|---|---|
| 1 | -28.0 | +28.0 | 3.0 (Ø5.0 cbore) |
| 2 | -28.0 | -28.0 | 3.0 (Ø5.0 cbore) |
| 3 | +42.0 | +20.0 | 3.0 (Ø5.0 cbore) |
| 4 | +42.0 | -20.0 | 3.0 (Ø5.0 cbore) |

## Where the files are

- SLAMTEC: [RPLIDAR A-series support and downloads](https://www.slamtec.com/en/Support#rplidar-a-series) — web — Publisher's page; dimensions are facts
- SLAMTEC: [RPLIDAR A1M8 R1 2D mechanical drawing (PDF)](https://download-en.slamtec.com/api/download/rplidar-core-a1m8-r1-model-2d-pdf/2.0?lang=en) — web — Publisher's page; dimensions are facts
- SLAMTEC: [RPLIDAR A1M8 R1 3D model (IGES)](https://download-en.slamtec.com/api/download/rplidar-core-a1m8-r1-model-3d-igs/2.0?lang=netural) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/slamtec-rplidar-a1m8/index.json

- slamtec-rplidar-a1m8: [STEP](https://xemstudio.com/files/hardware/slamtec-rplidar-a1m8/slamtec-rplidar-a1m8.step) · [STL](https://xemstudio.com/files/hardware/slamtec-rplidar-a1m8/slamtec-rplidar-a1m8.stl) — SLAMTEC RPLIDAR A1M8 360° laser scanner: base outline, 4 mounting holes, scanning head and motor

## Questions

**What is the RPLIDAR A1M8 mounting hole pattern?**

Four Ø3.0 holes, 70.0 mm apart along the base, 56.0 mm apart across at the head end and 40.0 mm across at the motor end.

**How big is the RPLIDAR A1M8?**

96.74 × 70.28 × 51.0 mm overall; the scanning head is Ø70.0 and its top is 51.0 mm above the lowest point.

**Where is the RPLIDAR A1 head axis?**

35.14 mm from the head end of the base; the head-end holes are 28.0 mm and the motor-end holes 42.0 mm from it along the length.

## Fits with

- [Threaded standoffs, M2.5 and M3 (hex and round)](https://xemstudio.com/objects/threaded-standoffs-metric/)
- [Socket head cap screws, M2–M8 (ISO 4762 / DIN 912)](https://xemstudio.com/objects/socket-head-cap-screws-metric/)
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