# DENSO Robotics HSR055A1-N/S Bellows

Hardware · `HSR055A1-N/S Bellows` · verification: source checked

The DENSO Robotics HSR055A1-N/S Bellows is a four-axis robot with a 550 mm reach and an 8 kg payload. It uses AC servomotors, absolute encoders, and brakes on the Z and T axes. It is listed with Z-axis stroke options of 170 mm, 290 mm, and 450 mm.

## Specification

| Property | Value |
|---|---|
| Category | scara robot |
| Axes | 4 |
| Payload | 8 kg |
| Reach | 550 mm |
| Weight | 31.5 kg |
| Max TCP speed | 8000 mm/s |

### Joints

| Name | Range min (°) | Range max (°) | Max speed (°/s) |
|---|---|---|---|
| J1 | -130 | 130 |  |
| J2 | -150 | 150 |  |
| Z |  |  |  |
| T | -360 | 360 | 2500 |

## Connected

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

## Safety

- Brakes are provided for the Z and T axes.
- Brake release on non-UL-Listed models can be done with the brake release switch in direct teaching mode or by command from the teach pendant or mini-pendant.
- On UL-Listed models, brake release requires the brake release switch with controller power ON; the teach pendant or mini-pendant cannot release the brakes.
- Air operating pressure is 0.05–0.35 MPa; maximum allowable pressure is 0.59 MPa.
- Noise level is stated as <80 dB(A).
- Maximum force-fit is 98 N for 1 second or less.
- Maximum allowable inertia moment is 0.12 kg·m².

## Study notes

- Bellows model Z-axis stroke options are 170 mm, 290 mm, and 450 mm.
- Available in floor-mount and ceiling-mount configurations.
- User air piping has 4 systems: two φ4 and two φ6 lines.
- User signal lines include 19 lines for proximity sensors and 8 Ethernet lines as an option.
- Options include a wiring protection kit, built-in Ethernet, external encoder battery, and stopper with bearing.
- Maximum composite speed is specified at the center of the hand mounting flange.
- Position repeatability for J1+J2 is stated as ±0.01 mm to ±0.012 mm; Z is ±0.01 mm and T is ±0.004°.

## Sources

1. [HSR Series 4-axis Robots | DENSO Robotics](https://www.densorobotics.com/products/4-axis/hsr-series/) (accessed 2026-10-26)

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