Hardinge GS-65

$105,000 - $155,000 Updated 2026-03-19

Key Specifications

X Travel

210 mm (8.27 in)

Z Travel

500 mm (19.69 in)

Max Spindle

4,500 RPM

Spindle Power

18.5 kW (25 HP) continuous

Max Turn Length

500 mm (19.69 in)

chuck size

250 mm (10 in) hydraulic

Overview

The Hardinge GS-65 is the largest-bore model in Hardinge's GS series of precision CNC turning centers, featuring a 65 mm (2.56 in) bar capacity that extends the GS platform into mid-range production turning. The GS-65 fills the gap between Hardinge's traditional small-bore precision lathes and larger production turning centers, offering Hardinge-grade spindle precision at a bar capacity that accommodates a significantly wider range of production parts.

The main spindle delivers 18.5 kW (25 HP) continuous power through an A2-6 spindle nose at speeds up to 4,500 RPM, with a maximum torque of 250 Nm (184 ft-lb). The spindle is built on Hardinge's proven angular-contact bearing arrangement with thermal compensation, maintaining concentricity specifications within the sub-5-micron range. The collet-ready spindle accepts Hardinge collets for bar stock up to 65mm, and a 250 mm (10 in) hydraulic chuck handles larger-diameter second-operation and chuck work.

X-axis travel is 210 mm (8.27 in) and Z-axis travel is 500 mm (19.69 in), with rapid traverse rates of 20 m/min in X and 24 m/min in Z. The GS-65 features hardened and ground box ways on both axes, providing the rigidity and vibration damping that Hardinge engineers consider essential for precision turning. The 12-station VDI turret supports live tooling with C-axis indexing for cross-drilling, flat milling, and thread milling operations.

The GS-65 runs on the Fanuc 0i-TF Plus control and weighs 4,200 kg (9,259 lb). Standard features include through-spindle coolant, hydraulic tailstock, and chip conveyor. New GS-65 machines typically price between $105,000 and $155,000. The GS-65 competes with the Okuma LB3000 EX II, Haas ST-25Y, and Mazak Quick Turn 250M in the 65mm bar turning segment.

Full Specifications

Parameter	Value
Chuck Size	250 mm (10 in) hydraulic
Max Turning Diameter	360 mm (14.17 in)
Max Turning Length	500 mm (19.69 in)
Bar Capacity	65 mm (2.56 in)
Spindle Nose	A2-6
Max Spindle Speed	4,500 RPM
Spindle Motor Power	18.5 kW (25 HP) continuous
Spindle Torque	250 Nm (184 ft-lb)
X-Axis Travel	210 mm (8.27 in)
Z-Axis Travel	500 mm (19.69 in)
Rapid Traverse X	20 m/min (787 IPM)
Rapid Traverse Z	24 m/min (945 IPM)
Turret	12-station VDI
Guideway Type	Hardened and ground box ways
Collet System	Collet-ready up to 65 mm
Tailstock	Hydraulic, programmable
CNC Control	Fanuc 0i-TF Plus
Machine Weight	4,200 kg (9,259 lb)

Specifications sourced from hardinge.com — verified 2026-03-28

Strengths & Limitations

Strengths

65mm bar capacity significantly expands the range of parts that can be run from bar compared to 42mm and 51mm bore machines, covering most mid-range production requirements
18.5 kW spindle with 250 Nm torque provides strong roughing capability while maintaining the precision finishing that defines the Hardinge brand
Hardened and ground box ways on both axes deliver superior vibration damping, critical when turning larger-diameter bar stock where chatter is more likely
Collet-ready spindle design for bar stock up to 65mm provides measurably better workholding accuracy than 3-jaw chucks at this bar capacity
4,200 kg machine weight provides excellent thermal mass for dimensional stability across long production runs
12-station VDI turret with live tooling and C-axis enables complete part processing without secondary machining center operations

Limitations

4,500 RPM maximum spindle speed is lower than competitors offering 5,000-6,000 RPM, limiting high-speed finishing on smaller diameters
500mm Z-axis travel is moderate, requiring the GS-250L for parts exceeding 20 inches in turning length
Box way design trades rapid traverse speed for cutting rigidity, adding cycle time in high-volume production with significant non-cutting moves
Hardinge's contracted service network may result in longer response times compared to Haas, Mazak, or DMG Mori in some regions

Best For

Aerospace shops turning mid-diameter shafts, fittings, and structural components in titanium and Inconel where surface finish and concentricity are specified tightly Hydraulic and fluid power manufacturers producing valve bodies, cylinder components, and pump parts from 2-2.5 inch bar stock Medical device companies producing larger orthopedic components, joint replacement hardware, and surgical instrument assemblies from mid-range bar stock Oil and gas equipment manufacturers machining connectors, fittings, and valve components in stainless and duplex stainless steels Job shops seeking a versatile 65mm bar machine that delivers precision collet-level accuracy on production work

Frequently Asked Questions

01 What does a new Hardinge GS-65 cost?

New Hardinge GS-65 turning centers typically price between $105,000 and $155,000 depending on configuration. Options including live tooling, C-axis, bar feeder, tailstock, and high-pressure coolant affect the final price. A fully equipped GS-65 with live tooling, C-axis, and bar feeder can approach $190,000.

02 How does the GS-65 compare to the Haas ST-25?

Both machines target the 65mm bar capacity segment, but they approach it differently. The Haas ST-25 uses linear guideways for faster rapids and lower price, while the GS-65 uses box ways for superior surface finish and vibration damping. The Hardinge offers collet-ready spindle precision that the Haas cannot match. Choose the GS-65 for precision-critical applications; the ST-25 for general-purpose production at lower cost.

03 What is the advantage of 65mm bar capacity over 51mm?

The jump from 51mm to 65mm bar capacity opens up a significantly wider range of parts that can be run from bar stock. Many hydraulic fittings, aerospace connectors, and automotive components fall in the 2-2.5 inch diameter range. Running these parts from bar eliminates the need for pre-machined blanks or castings, reducing material cost and handling time.

04 Can the GS-65 use Hardinge collets?

Yes, the GS-65 features Hardinge's collet-ready spindle design that accepts collets for bar stock up to 65mm. Collet workholding provides significantly better concentricity than standard 3-jaw chucks. Emergency collets can be bored to custom sizes for non-standard stock. The collet-ready design is a key differentiator that justifies the Hardinge premium over standard chuck-based lathes.