# FANUC SR-3iA/U

Hardware · `SR-3iA/U` · verification: source checked

The FANUC SR-3iA/U is a 4-axis SCARA robot mounted upside down (ceiling mounted) for assembly, pick and place, inspection and packaging work. It carries a 3 kg payload at the wrist and has a 350 mm horizontal reach, moving through a full 360° envelope with no dead zones. It runs on FANUC R-30iB controllers and is programmed through the web-based iRProgrammer interface rather than a teach pendant.

## Specification

| Property | Value |
|---|---|
| Category | scara robot |
| Axes | 4 |
| Payload | 3 kg |
| Reach | 350 mm |
| Repeatability | 0.01 mm |
| Weight | 27 kg |
| IP rating | IP20 |

### Joints

| Name | Range min (°) | Range max (°) | Max speed (°/s) |
|---|---|---|---|
| J1 | -225 | 225 | 610 |
| J2 | -225 | 225 | 840 |
| J3 |  |  |  |
| J4 | -720 | 720 | 3000 |

## Connected

- Manufacturer: [FANUC](https://machineschema.com/manufacturer/fanuc.md)
- Controllers: [FANUC R-30iB Compact Plus](https://machineschema.com/controller/fanuc-r-30ib-compact-plus.md), [FANUC R-30iB Plus](https://machineschema.com/controller/fanuc-r-30ib-plus.md)
- Variants: [FANUC SR-3iA/U Environmental Option](https://machineschema.com/hardware/fanuc-sr-3ia-u-environmental-option.md)
- Variant of: [FANUC SR-3iA](https://machineschema.com/hardware/fanuc-sr-3ia.md)

## Study notes

- Repeatability is quoted per axis: ±0.01 mm for J1 and J2, ±0.01 mm for J3, and ±0.004° for J4.
- J3 is a linear axis with a 140 mm stroke and a maximum speed of 1500 mm/s.
- J1 and J2 both have a motion range of ±225° and maximum speeds of 610 °/s and 840 °/s respectively.
- J4 has a motion range of ±720° and a maximum speed of 3000 °/s.
- Maximum push force is 150 N.
- Allowable J4 moment/inertia is 0.06 kg·m².
- I/O, 24 VDC, solenoid valves and air lines are integrated into the arm.
- Programming uses the web-based iRProgrammer interface on a tablet or desktop computer; no iPendant Touch is needed.
- Applications listed: assembly, dispensing and sealing, palletizing, picking and packaging.
- Controller series is R-30iB Plus; the compatible controller listed is R-30iB Compact Plus.

## Sources

1. [SR-3iA/U SCARA Robot](https://www.fanucamerica.com/products/robot/sr-3ia-u) (accessed 2026-10-25)
2. [sr 3ia u datasheet](https://www.fanucamerica.com/uploads/files/data-sheets/sr-3ia-u-datasheet.pdf) (accessed 2026-10-25)

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