INDEX G300

$450,000 - $650,000 Updated 2026-03-16

Key Specifications

Rapid Traverse

30 m/min (1,181 ipm)

Max Turn Length

600 mm (23.6 in)

max bar diameter

76 mm (3 in)

main spindle speed

5,000 RPM

main spindle power

22 kW (30 hp)

counter spindle speed

5,000 RPM

Overview

The INDEX G300 is INDEX-Traub's mid-size dual-spindle, dual-turret turn-mill center, extending the productive automation concept of the G200 to a larger bar diameter capacity of 76 mm (3 in) and a more expansive turning envelope. The G300 targets precision manufacturing of complex parts in the 65-76 mm diameter range — automotive shafts, hydraulic valve bodies, aerospace fittings, and medical housings — where the combination of two simultaneous turrets and a counter-spindle enables complete machining from bar stock in a single automated cycle.

The main spindle delivers 5,000 RPM with 22 kW (30 hp), providing the torque required for aggressive first-pass material removal on medium-diameter steel and stainless parts. The counter-spindle matches the main spindle's capability for back-working operations including back-turning, drilling, and milling on the part's second face. Both upper and lower turrets carry 12 live tool stations each, totaling 24 live positions with individual live tool motors providing up to 8,000 RPM for milling and drilling.

Y-axis capability is standard on the upper turret with ±80 mm travel, enabling off-center milling, slot cutting, and eccentric features that C-axis/live tool combinations alone cannot produce cleanly. The lower turret provides support turning and secondary operations during upper turret machining, maximizing the fraction of cycle time where metal is being cut. The machine's iXpanel control presents a graphical interface that simplifies dual-turret programming for turn-mill operations.

At $450,000-$650,000, the G300 competes with the DMG Mori NLX 3000, Mazak QT-Nexus 300-II, and Doosan/DN Solutions PUMA 300 in the mid-size turn-mill class. INDEX's pricing premium reflects German manufacturing quality, the dual-turret configuration, and a reliability record in high-utilization automotive environments that Korean alternatives have not matched over equivalent machine lifetimes.

Full Specifications

Parameter	Value
Max Bar Diameter	76 mm (3 in)
Main Spindle Speed	5,000 RPM
Main Spindle Power	22 kW (30 hp)
Counter Spindle Speed	5,000 RPM
Upper Turret Stations	12 (live tooling)
Lower Turret Stations	12 (live tooling)
Max Turning Diameter	280 mm (11 in)
Max Turning Length	600 mm (23.6 in)
Y Axis Travel	±80 mm (±3.1 in)
Live Tool Speed	8,000 RPM
Rapid Traverse Rate	30 m/min (1,181 ipm)
Machine Weight	~11,000 kg (24,251 lb)
CNC Control	INDEX iXpanel (Mitsubishi-based)
Guest Name	Dietary Restriction
David	None
Bob	None
Nancy	None
Mary	Vegetarian
Formula	Formula Output
Index	3
Goal	Formula
Find Marys Dietary Restriction	=INDEX(A1:D6, MATCH("Mary", A1:A6, 0), MATCH("Dietary Restriction", A1:D1, 0))
Find Who Is At Table Number 2	=INDEX(A1:D6, MATCH(2, D1:D6, 0), MATCH("Guest Name", A1:D1, 0))

Strengths & Limitations

Strengths

76 mm bar capacity extends coverage to larger-diameter automotive shafts, hydraulic fittings, and aerospace housings
22 kW (30 hp) main spindle provides aggressive roughing capability for medium-diameter steel and stainless production
±80 mm Y-axis travel enables off-center milling and complex features that expand the scope of parts completable in one setup
Dual-turret with 24 live tool positions supports complex programs without tool management constraints
Simultaneous counter-spindle back-working eliminates dead time between front and back face machining
INDEX German reliability is proven across high-utilization automotive supply chain environments

Limitations

$450K-$650K represents a significant capital commitment that requires high-utilization production work to justify
iXpanel control familiarity is lower than Fanuc or Siemens in most North American job shop environments
INDEX's North American service and dealer network is more limited than DMG Mori or Mazak
11,000 kg machine weight requires a solid foundation and careful site planning
Programming dual-turret simultaneous cycles requires experienced turn-mill programmers

Best For

Automotive Tier 1 and Tier 2 suppliers machining shafts, connecting rods, and housing components in the 76mm diameter range Hydraulic valve and manifold manufacturers requiring complete machining of complex bodies with cross-drilled features Aerospace precision component suppliers machining titanium and Inconel fittings and housings in single-setup automated cycles Job shops with recurring contracts for complex turned-and-milled parts where dual-turret speed delivers competitive cycle times Precision manufacturers seeking German build quality and dual-turret productivity in a 76mm bar-capable machine

Frequently Asked Questions

01 What is the turning capacity of the INDEX G300?

The G300 handles bar stock up to 76 mm (3 in) in diameter, with a maximum turning diameter of 280 mm (11 in) for chucked work and a maximum turning length of 600 mm (23.6 in). This positions it for medium-size shaft and chucked component work in automotive, hydraulic, and aerospace applications.

02 How does the G300 compare to the G200?

The G300 handles larger bar diameters (76 mm vs 65 mm), has a larger turning envelope, and provides more Y-axis travel (±80 mm vs ±60 mm). Both share the dual-spindle, dual-turret architecture and iXpanel control. The G300 is priced $100,000-$150,000 higher than the G200. Choose the G300 when parts regularly exceed 65 mm diameter.

03 Can the G300 machine titanium and Inconel?

Yes. The G300's 22 kW (30 hp) main spindle and rigid construction support titanium and Inconel machining at appropriate cutting parameters. Through-spindle coolant (high-pressure TSC) is recommended for these materials to manage heat and chip evacuation. The machine's structural rigidity helps minimize chatter when machining these challenging materials.

04 What programming software works with the G300?

The G300's iXpanel control accepts standard ISO G-code programs from CAM systems including Mastercam, Hypermill, and ESPRIT. Post processors for the INDEX iXpanel (Mitsubishi-based) are available from INDEX and the major CAM software vendors. INDEX also provides proprietary graphical programming cycles for common turn-mill operations directly at the control.