Haas Automation CNC Lathes / Turning Centers

Haas ST-25Y

List US$127,995 Specs verified 2026-10-02 · haascnc.com Updated 2026-10-02

Image: haascnc.com, Haas Automation

Key Specifications

X Travel

8.4 in (213 mm)

Y Travel

± 2 in (± 51 mm)

Z Travel

22.5 in (572 mm)

Max Spindle

3,400 rpm

Spindle Power

30 hp (22.4 kW)

Max Turn Length

22.5 in (572 mm)

How much does the Haas ST-25Y cost?

Manufacturer list price

US$127,995

As published by Haas Automation, verified 2026-10-02. Options, tooling, freight and installation are extra.

Overview

The Haas ST-25Y is the short-bed Y-axis lathe with the 30 hp (22.4 kW) spindle. It holds work in a 10 in (254 mm) chuck or feeds 3 in (76 mm) bar, turns up to 11.75 in (298 mm) in diameter and 22.5 in (572 mm) long, and mills with BMT65 live tools at up to 4,000 rpm across ± 2 in (± 51 mm) of Y.

Haas lists a sub-spindle as an option, and the rows for it are complete enough to plan around. It carries a 5.3 in (135 mm) chuck on an A2-5 nose, runs to 6,000 rpm alone and synchronises with the main spindle up to 3,400 rpm. That is the main spindle's own maximum, so a part can be handed over at any cutting speed. The bore is 1.5 in (38.1 mm), the drawbar bore is 1 in in diameter by 4.5 in deep (25.4 mm by 114.3 mm), and the integrated brake holds 17 ft-lbf (23 N·m). That brake is small against the 250 ft-lbf (339 N·m) of the main C-axis brake: heavy live-tool cuts belong on the main spindle side, light finishing and drilling on the sub.

The ST-20Y covers the same envelope with 20 hp (14.9 kW), 150 ft-lbf (203 N·m) at 500 rpm and 2.5 in (64 mm) bar, and weighs 10,480 lb (4,754 kg). This machine gives 300 ft-lbf (407 N·m) at 500 rpm and weighs 12,300 lb (5,580 kg).

Beyond the sub-spindle, the two-stage parts catcher, automatic parts loader, automatic door and tailstock are options. WiFi is standard. Haas describes this generation as having new castings, more compact and more rigid, with an 11% smaller footprint than its predecessor and more Z travel. The machine needs 70 A at 220 VAC three-phase or 35 A at 440 VAC, and Haas lists a starting price of US$127,995.

Full Specifications

Parameter	Value
Chuck Size	10 in (254 mm)
Max Swing	21 in (533 mm)
Max Turning Diameter	11.75 in (298 mm)
Max Turning Length	22.5 in (572 mm)
Bar Capacity	3 in (76 mm)
X-Axis Travel	8.4 in (213 mm)
Y-Axis Travel	± 2 in (± 51 mm)
Z-Axis Travel	22.5 in (572 mm)
Rapid Traverse X	472 ipm (12 m/min)
Rapid Traverse Y	472 ipm (12 m/min)
Rapid Traverse Z	945 ipm (24 m/min)
Max Thrust X	4,100 lbf (18,238 N)
Max Thrust Y	2,300 lbf (10,231 N)
Max Thrust Z	5,100 lbf (22,686 N)
Spindle Nose	A2-6
Spindle Motor Power	30 hp (22.4 kW)
Max Spindle Speed	3,400 rpm
Spindle Torque	300 ft-lbf @ 500 rpm (407 N·m @ 500 rpm)
Spindle Bore	3.5 in (88.9 mm)
C Axis Max Rating	5 hp (3.7 kW)
C Axis Speed	60 rpm
C Axis Positioning	0.01 °
C Axis Brake Diameter	13.9 in (353 mm)
C Axis Brake Holding Torque	250 ft-lbf (339 N·m)
C Axis Control Type	Interpolated Motion and Positioning
Sub Spindle Chuck Size	5.3 in (135 mm)
Sub Spindle Nose	A2-5
Sub Spindle Speed	6,000 rpm
Sub Spindle Max Sync Speed with Main Spindle	3,400 rpm
Sub Spindle Chuck Throat	Ø 1.3 in × 1.37 in DEEP (Ø 33 mm × 34.8 mm DEEP)
Sub Spindle Drawbar Bore	Ø 1 in × 4.5 in DEEP (Ø 25.4 mm × 114.3 mm DEEP)
Sub Spindle Spindle Bore	1.5 in (38.1 mm)
Sub Spindle Integrated Brake Torque	17 ft-lbf (23 N·m)
Sub Spindle Spindle Orientation Accuracy	± 0.02 °
Sub Spindle Rapids	400 ipm (10 m/min)
Turret Stations	12
Turret OD Vs ID Tools	Any Combination (will vary with turret)
Turret Boring Bar Rear Clearance	4 in (102 mm)
Live Tool Speed	4,000 rpm
Live Tooling	BMT65
Coolant Capacity	55 gal (208 L)
Air Required	4 scfm @ 100 psi (113 L/min @ 6.9 bar)
Inline Air Hose	3/8 in
Air Coupler	3/8 in
Air Pressure Min	80 psi (5.5 bar)
Electrical Service (low voltage)	220 VAC 3-phase, 70 A
Electrical Service (high voltage)	440 VAC 3-phase, 35 A
Shipping Domestic Pallet	142 × 90 × 92 in (361 × 229 × 234 cm)
Shipping Export Pallet	143 × 90 × 92 in (364 × 229 × 234 cm)
Machine Weight	12,300 lb (5,580 kg)

Specifications sourced from haascnc.com — verified 2026-10-02

Strengths & Limitations

Strengths

30 hp (22.4 kW) and 300 ft-lbf (407 N·m) at 500 rpm in a short-bed Y-axis lathe
Optional sub-spindle synchronises to the full 3,400 rpm of the main spindle
± 2 in (± 51 mm) of Y travel with an interpolating C axis that positions to 0.01°
3 in (76 mm) of bar capacity on a 10 in (254 mm) chuck machine
Automation options: two-stage parts catcher, automatic parts loader and automatic door

Limitations

The sub-spindle is an option, and its brake holds only 17 ft-lbf (23 N·m)
Sub-spindle bore is 1.5 in (38.1 mm), half the 3 in (76 mm) main bar capacity
22.5 in (572 mm) of turning length; the ST-20LY offers 42.5 in (1,080 mm), with a 20 hp (14.9 kW) spindle
The main spindle is limited to 3,400 rpm and the live tools to 4,000 rpm
X and Y rapids are 472 ipm (12 m/min), half the 945 ipm (24 m/min) of Z

Best For

Complete machining of 3 in (76 mm) bar parts with the optional sub-spindle Steel turn-mill parts that need 300 ft-lbf (407 N·m) of spindle torque Short chucked parts with off-centre milled features Unattended bar work with the optional parts catcher

Frequently Asked Questions

01 What are the sub-spindle specifications on the ST-25Y?

The sub-spindle is an option. It has a 5.3 in (135 mm) chuck on an A2-5 nose, a 6,000 rpm maximum and a 3,400 rpm maximum when synchronised with the main spindle. Its bore is 1.5 in (38.1 mm), the integrated brake holds 17 ft-lbf (23 N·m), orientation accuracy is ± 0.02° and it rapids at 400 ipm (10 m/min).

02 ST-25Y or ST-20Y: what is the difference?

Spindle size. The ST-20Y has an 8.3 in (210 mm) chuck, 2.5 in (64 mm) of bar capacity, 20 hp (14.9 kW) and 150 ft-lbf (203 N·m), with a 4,000 rpm spindle, and weighs 10,480 lb (4,754 kg). The ST-25Y has a 10 in (254 mm) chuck, 3 in (76 mm) of bar capacity, 30 hp (22.4 kW) and 300 ft-lbf (407 N·m), tops out at 3,400 rpm and weighs 12,300 lb (5,580 kg).

03 How far off centre can the ST-25Y mill?

Y travel is ± 2 in (± 51 mm), so a live tool can work up to that distance either side of the spindle centreline without rotating the part. Beyond that the C axis repositions the work; it positions to 0.01° and can interpolate with the live tool. Y-axis thrust is 2,300 lbf (10,231 N).

04 Which features are standard and which are options?

The Y axis, C axis and BMT65 live tooling are in the base table, and WiFi is listed as standard. The sub-spindle, two-stage parts catcher, automatic parts loader, automatic door and the new-design tailstock are all listed as options, so none should be assumed on a base machine.

05 How heavy is the ST-25Y and what supply does it need?

12,300 lb (5,580 kg). It runs on 220 VAC three-phase at 70 A or 440 VAC three-phase at 35 A, uses 4 scfm of air at 100 psi (113 L/min at 6.9 bar) with an 80 psi (5.5 bar) minimum, and carries 55 gal (208 L) of coolant.