# Nachi Robotics SRA100B

Hardware · `SRA100B` · verification: source checked

The Nachi Robotics SRA100B is a six-axis articulated industrial robot driven by AC servo motors, intended for spot welding and other handling applications. It has a 100 kg wrist payload, a reach of 2,071 mm, and ±0.1 mm position repeatability. The robot weighs 690 kg and is floor-mounted.

## Specification

| Property | Value |
|---|---|
| Category | industrial robot |
| Axes | 6 |
| Payload | 100 kg |
| Reach | 2071 mm |
| Repeatability | 0.1 mm |
| Weight | 690 kg |
| Operating temp min | 10 °C |
| Operating temp max | 45 °C |

### Joints

| Name | Range min (°) | Range max (°) | Max speed (°/s) |
|---|---|---|---|
| Axis 1 | -180 | 180 | 136 |
| Axis 2 | -120 | 60 | 110 |
| Axis 3 | -150 | 180 | 130 |
| Axis 4 | -360 | 360 | 240 |
| Axis 5 | -135 | 135 | 233 |
| Axis 6 | -360 | 360 | 351 |

## Connected

- Manufacturer: [Nachi Robotics](https://machineschema.com/manufacturer/nachi-robotics.md)

## Safety

- Operating humidity range is 20 to 85%RH, with no dew condensation allowed.
- Maximum installation altitude is 1,000 m above sea level.
- Vibration at the installation face must not exceed 0.5G (+8 m/s²).
- If the robot is used above the permitted height, the permitted temperature is affected by height; consult a Nachi-Flukoshi office.

## Study notes

- The standard type robot model is listed as SRA100B-01.
- Listed applications include machine tending, material handling, palletizing, spot welding, and dispensing.
- Allowable static load torque is 580 N·m on axis 4, 580 N·m on axis 5, and 290 N·m on axis 6.
- Allowable moment of inertia is 45 kg·m² on axis 4, 45 kg·m² on axis 5, and 22.7 kg·m² on axis 6.
- Installation is floor mounting.
- The FD controller provides fourth-generation servo gun control software and pressure calibration up to 10 points.
- The SRA series includes payloads from 100 kg to 240 kg, invert-mount models, long-reach models over 3 m, and a hollow-arm option for internal routing of spot-welding utilities.
- For aluminum spot welding, the document states tip life of more than 400 welds between dress cycles.

## Sources

1. [SRA100B](https://www.nachirobotics.com/product/sra100-b/) (accessed 2026-10-25)

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