# GROB G340

Hardware · `G340` · verification: source checked

The GROB G340 is a machining center with four motor spindles arranged in parallel, allowing four workpieces to be machined at the same time in one cycle. It has a swivel/rotary table and horizontal motor spindles, and workpieces are machined from above so chips fall away. It is built for high-volume series production and can run as a standalone machine or be integrated into automated lines with gantry, robot or cell automation.

## Specification

| Property | Value |
|---|---|
| Category | cnc mill |
| Weight | 36500 kg |
| Travel X | 650 mm |
| Travel Y | 1050 mm |
| Travel Z | 920 mm |
| Spindle max | 18000 rpm |
| Spindle taper | HSK-A63 |
| Rapid traverse | 120 m/min |
| Table load | 350 kg |

## Connected

- Manufacturer: [GROB](https://machineschema.com/manufacturer/grob.md)

## Study notes

- Working travels X/Y/Z are 650/1,050/920 mm; the Y travel is 1,300 mm only on the AF machine version.
- Maximum axis speeds are given as 90 m/min in X, 50 m/min in Y and 120 m/min in Z.
- Spindle speed range is 12,000 to 18,000 rpm; four motor spindles are arranged in parallel.
- Chip-to-chip time t1 according to VDI 2852 is 2.4 s with a SIEMENS control system.
- Interference diameter is stated as 4x698 mm.
- Positioning accuracy in X/Y/Z is 0.006 mm according to ISO 230-2:2014 (accuracy, not repeatability).
- Table load is 4x350 kg across the A- and B-axis tables.
- Axis concept combines linear and rotary axes to give 5-side machining in a single setup.
- Chip disposal is handled by a flushing trough, a conveyor system or direct discharge.
- Typical workpieces listed are stator housings, knuckles and front knuckles in aluminium alloy, plus hydraulic and medical components.

## Sources

1. [G340 – Four-spindle machining center from GROB - GROB](https://www.grobgroup.com/en/products/product-range/machining-technology/g-modules/g340/) (accessed 2026-10-26)

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