Geminis GM9i
Image: geminislathes.com, Geminis
Key Specifications
headstock type
column
bed type
device change
tool changer
max workpiece weight
How much does the Geminis GM9i cost?
Price estimate
We do not have a price for the Geminis GM9i that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The Geminis GM9i is the largest GM multi-tasking lathe, with a maximum turning diameter of 2,000 / 2,500 mm (78.7 / 98.4 in) and a workpiece weight given as a range, 25,000 - 80,000 kg (55,115 - 176,367 lb).
That weight row is the unusual one. A range means the rating depends on how the machine is built, so an individual GM9i may sit anywhere between the two ends. Add the two listed diameters and a length range of 1 - 24 m (39.4 - 944.9 in), and the model is better understood as a platform configured to a part than as one fixed machine. Anyone assessing an existing GM9i should ask for its as-built weight rating and diameter.
At the bottom of its range it overlaps the GM7i, which is rated for 30,000 kg (66,138 lb) but turns no more than 1,600 / 1,800 mm (63.0 / 70.9 in). Diameter, then, is what sends a mid-weight part to the larger machine.
The rest of the table names the equipment without figures: a Twin Drive Headstock, a Monoblock bench, a Multiprocess column, ATC automatic tool change and automatic device storage and switching.
Full Specifications
| Parameter | Value |
|---|---|
| Headstock Type | Twin Drive Headstock |
| Column | Multiprocess column |
| Bed Type | Monoblock bench |
| Device Change | Automatic device storage and switching |
| Tool Changer | ATC automatic tool change |
| Max Workpiece Weight | 25,000 - 80,000 kg (55,115 - 176,367 lb) |
| Max Turning Diameter | 2,000 / 2,500 mm (78.7 / 98.4 in) |
| Length Range | 1 - 24 m (39.4 - 944.9 in) |
Specifications sourced from geminislathes.com — verified 2026-10-03
Strengths & Limitations
Strengths
- Workpiece weight range reaching 80,000 kg (176,367 lb)
- Turning diameter of 2,000 / 2,500 mm (78.7 / 98.4 in), beyond the 1,600 / 1,800 mm (63.0 / 70.9 in) of the GM7i
- Tools and machining devices are both changed automatically on the Multiprocess column
- Available across a length range of 1 - 24 m (39.4 - 944.9 in)
Limitations
- The weight rating is a range starting at 25,000 kg (55,115 lb), so the capacity of a particular machine has to be confirmed
- Which build gives 2,500 mm (98.4 in) instead of 2,000 mm (78.7 in) is not stated in the table
- No power, torque, speed or tool-capacity figures are listed for the headstock, column or ATC
Best For
Frequently Asked Questions
01
Geminis lists 25,000 - 80,000 kg (55,115 - 176,367 lb) without breaking it down. The practical reading is that the rating varies with the configuration ordered. Before committing a heavy part, get the rating for the specific diameter and length in writing.
02
The maximum turning diameter is listed as 2,000 / 2,500 mm (78.7 / 98.4 in). Two values are shown and the table does not name the variants, so the figure for a given machine needs confirming. The next size down, the GM7i, lists 1,600 / 1,800 mm (63.0 / 70.9 in).
03
The table lists a Multiprocess column, ATC automatic tool change and automatic device storage and switching, alongside a Twin Drive Headstock on a Monoblock bench. It gives no figures for any of them, so spindle data, tool capacity and the list of available devices must come from Geminis.
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