Geminis GT5i-G4

Specs verified 2026-10-03 · geminislathes.com Updated 2026-10-03

Image: geminislathes.com, Geminis

Key Specifications

guideways

4 upper guides Box Type

front guide

1 front guide protected from chips

chip evacuation

By means of optional double conveyors

max workpiece weight

8,000 / 12,000 kg (17,637 / 26,455 lb)

swing over bed

1,400 mm (55.1 in)

swing over carriage

1,100 mm (43.3 in)

How much does the Geminis GT5i-G4 cost?

Price estimate

Uncertain

We do not have a price for the Geminis GT5i-G4 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 GT5i-G4 is a horizontal CNC lathe with a 1,400 mm (55.1 in) swing over the bed, built on a bed with 4 upper guides Box Type where the GT5i-G2 of the same swing lists 2. That guideway row is the reason to consider this model instead of its sibling.

Box-type guides are sliding ways with broad contact faces, chosen for load capacity and damping under heavy or interrupted cuts. Geminis's table states the count and nothing more, so ask which units run on the additional pair and what that changes in practice for the work you have in mind.

Clearance over the carriage differs too: 1,100 mm (43.3 in) here against 1,050 mm (41.3 in) on the GT5i-G2. Workpiece weight does not move. Both tables read 8,000 / 12,000 kg (17,637 / 26,455 lb), so on paper the GT5i-G4 is not the higher-capacity machine, only the differently guided one.

Everything else is shared hardware: 1 front guide protected from chips, a headstock with 4 speed ranges, automatic changeover and main shaft oscillation, and a length range of 1 - 24 m (39.4 - 944.9 in). Double conveyors for chip evacuation are an option.

Full Specifications

Parameter	Value
Guideways	4 upper guides Box Type
Front Guide	1 front guide protected from chips
Chip Evacuation	By means of optional double conveyors
Max Workpiece Weight	8,000 / 12,000 kg (17,637 / 26,455 lb)
Swing Over Bed	1,400 mm (55.1 in)
Swing Over Carriage	1,100 mm (43.3 in)
Length Range	1 - 24 m (39.4 - 944.9 in)
Spindle Speed Ranges	4 speed ranges with automatic changeover and main shaft oscillation

Specifications sourced from geminislathes.com — verified 2026-10-03

Strengths & Limitations

Strengths

4 upper guides Box Type on the bed, twice the count listed for the GT5i-G2
1,100 mm (43.3 in) swing over the carriage, against 1,050 mm (41.3 in) on the GT5i-G2
Front guide is protected from chips
Range changes are automatic: 4 speed ranges with automatic changeover and main shaft oscillation

Limitations

Workpiece weight is the same 8,000 / 12,000 kg (17,637 / 26,455 lb) as the GT5i-G2, so the extra guides do not raise the listed load
The double chip conveyors are an option, not part of the base machine
The table does not explain what the two additional guides carry, which leaves the main benefit of this variant to be confirmed with Geminis

Best For

Buyers comparing the 4-guide bed against the GT5i-G2 for the same 1,400 mm (55.1 in) swing Long work up to 1,100 mm (43.3 in) in diameter over the carriage Heavy roughing where sliding box-type guides are preferred Parts inside the 8,000 / 12,000 kg (17,637 / 26,455 lb) weight row

Frequently Asked Questions

01 What is the difference between the GT5i-G4 and the GT5i-G2?

Two rows. The GT5i-G4 lists 4 upper guides Box Type and a 1,100 mm (43.3 in) swing over the carriage; the GT5i-G2 lists 2 upper guides and 1,050 mm (41.3 in). Swing over bed, workpiece weight, length range, front guide and speed ranges read the same on both.

02 Does the GT5i-G4 carry more weight than the GT5i-G2?

No, not according to the listed figures. The GT5i-G4 shows 8,000 / 12,000 kg (17,637 / 26,455 lb), and the GT5i-G2 shows the same pair. If the application is near 12,000 kg, ask Geminis what configuration that upper figure refers to on the four-guide bed.

03 How long can a GT5i-G4 be?

The length range is listed as 1 - 24 m (39.4 - 944.9 in). The length is therefore a decision made at order, and it sets the floor space and foundation the machine needs. Confirm with Geminis what usable turning length a given bed gives.