INDEX G250
Key Specifications
Max Turn Length
max turning diameter
max bar capacity
sub spindle speed
turret positions
control
How much does the INDEX G250 cost?
Estimated price range
Our best estimate for a mill-turn / multi-tasking machine in this class — not a quote from INDEX-Traub. Configuration moves it a long way.
Overview
The INDEX G250 is a turn-mill center listed with a 250 mm (9.84 in) maximum turning diameter, 600 mm of turning length and 65 mm (2.56 in) bar capacity, combining a 12-position VDI servo turret with live tooling and a B-axis milling unit fed from an 80-tool magazine. That pairing reads differently from the G200 and G220 Plus tables, whose turret-driven tools run to 7,200 rpm on HSK-A40.
The B-axis milling unit is rated 22 kW, and an 80-tool magazine (standard) means a large tool list can stay loaded between jobs. For a shop running many part numbers in small batches, that capacity matters more than raw spindle speed. The turret alongside it keeps simple turning and drilling tools out of the magazine.
The main spindle runs to 5,000 rpm. The counter spindle is listed at up to 7,000 RPM and 22 kW, faster than the main spindle, which favours small-diameter second-side work. The machine has 2 main spindles and 5 axes, with 6 as an option, and cuts with 1 tool at a time as standard or 2 with the option. A tailstock with quill and body is optional.
The listed figures need care. Inch rows in the same table give a 12.000" turning diameter, 55.000" turning length, a 2.600" bar with 4.020" optional and a 7.900" chuck with 12.400" optional, which do not match the metric rows. The control is listed both as a Siemens 840D sl (dual-channel) and as FANUC 31i-B5 / Siemens 840D sl. Get the envelope and the control confirmed by INDEX for the exact configuration before quoting work.
Full Specifications
| Parameter | Value |
|---|---|
| Max Turning Diameter | 250 mm (9.84 in) |
| Max Bar Capacity | 65 mm (2.56 in) |
| Sub Spindle Speed | Up to 7,000 RPM |
| Turret Positions | 12-position VDI servo turret with live tooling |
| CNC Control | Siemens 840D sl (dual-channel) |
| Machine Style | Bar, Chucker, Universal |
| Spindle Direction | Horizontal |
| CNC Type | C200-D (Siemens 840D) |
| Main Spindle Turning Diameter Max | 12.000" |
| Main Spindle Turning Length Max | 55.000" |
| Main Spindle Chuck Diameter | 7.900" |
| Main Spindle Chuck Diameter Opt | 12.400" |
| Main Spindle Max Swing | 22.000 |
| Main Spindle Bar Diameter Max | 2.600" |
| Main Spindle Bar Diameter Opt | 4.020" |
| Tail Stock Quill and Body | Optional |
| Num Main Spindles | 2 |
| Primary Tool Carrier | Turret 1,3 Top |
| Second Tool Carrier | Turret 2 Lower |
| Num Simultaneous Cutting Tools | 1 |
| Num Simultaneous Cutting Tools Opt | 2 |
| Num Axes | 5 |
| Number of Axes Opt | 6 |
| Number of Axes Opt 2 | 6 |
| X Axis | 11.800" |
| Z Axis | 31.000" Opt: 55.000" |
| Max Turning Length | 600 mm |
| Bar Capacity | 65 mm |
| Main Spindle Speed | 5,000 rpm |
| Sub Spindle Power | 22 kW |
| B Axis Milling Power | 22 kW |
| Tool Magazine Capacity | 80 tools (standard) |
| CNC Control | FANUC 31i-B5 / Siemens 840D sl |
Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.
Strengths & Limitations
Strengths
- B-axis milling unit rated 22 kW with an 80-tool magazine as standard
- 12-position VDI servo turret with live tooling alongside the milling unit
- Counter spindle up to 7,000 RPM and 22 kW
- 250 mm (9.84 in) turning diameter in the metric rows
- Optional tailstock with quill and body for shaft work
Limitations
- Main spindle limited to 5,000 rpm
- Bar capacity of 65 mm (2.56 in) in the metric rows
- Only 1 tool in cut as standard; a second simultaneous tool is an option
- Metric and inch rows disagree on diameter, length, bar and chuck, so the envelope must be confirmed
Best For
Frequently Asked Questions
01
The milling unit draws from an 80-tool magazine, listed as standard, and there is also a 12-position VDI servo turret with live tooling. Turning and drilling tools can stay on the turret, leaving the magazine for milling tools.
02
The metric rows give 250 mm (9.84 in) turning diameter and 600 mm turning length. Inch rows in the same table give 12.000" and 55.000", with X travel of 11.800" and Z of 31.000" (55.000" optional). The two sets disagree, so confirm the envelope for your configuration.
03
The main spindle runs to 5,000 rpm. The counter spindle is listed at up to 7,000 RPM with 22 kW, so it is the faster of the two and well suited to finishing small diameters on the second side.
04
One row lists a Siemens 840D sl (dual-channel) and another FANUC 31i-B5 / Siemens 840D sl. Ask which control is fitted to the machine being quoted, since post-processors and operator training follow from it.
05
As standard it cuts with 1 tool at a time; 2 simultaneous cutting tools are listed as an option. The machine has 5 axes, with 6 as an option, so check which axis and tool-carrier package the quote includes.
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