Haas Automation CNC Lathes / Turning Centers

Haas ST-35Y

List US$151,995 Specs verified 2026-10-02 · haascnc.com Updated 2026-10-02

Image: haascnc.com, Haas Automation

Key Specifications

X Travel

9.4 in (239 mm)

Y Travel

± 2 in (± 51 mm)

Z Travel

32.5 in (826 mm)

Max Spindle

3,200 rpm

Spindle Power

40 hp (29.8 kW)

Max Turn Length

32.5 in (826 mm)

How much does the Haas ST-35Y cost?

Manufacturer list price

US$151,995

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

Overview

The Haas ST-35Y is a Y-axis turning center with BMT65 live tooling at 4,000 rpm, a 12 in (305 mm) chuck and a 4.62 in (117.3 mm) spindle bore. It turns 13.75 in (349 mm) in diameter and 32.5 in (826 mm) long, and the Y axis travels ± 2 in (± 51 mm).

Begin with the main spindle, because it is large for a Y-axis lathe of this length. It is rated 40 hp (29.8 kW) and 425 ft-lbf (576 N·m) at 325 rpm, runs to 3,200 rpm and passes 4 in (102 mm) bar. An optional gearbox takes torque to 1,400 ft-lbf (1,898 N·m) at 150 rpm. The live tools spin faster than the main spindle, 4,000 rpm against 3,200 rpm, which helps small drills and end mills reach a workable surface speed.

Milling depends on the C axis. Haas describes its control as interpolated motion and positioning. It resolves 0.01°, turns at up to 60 rpm with a 5 hp (3.7 kW) rating and is clamped by a 13.9 in (353 mm) brake good for 250 ft-lbf (339 N·m). Thrust on Y is 2,300 lbf (10,231 N), compared with 4,100 lbf (18,238 N) on X and 5,100 lbf (22,686 N) on Z.

Where the ST-28Y stops at 11.75 in (298 mm) of turning diameter and 22.5 in (572 mm) of turning length, the ST-35Y carries the same 40 hp (29.8 kW) spindle rating and ± 2 in (± 51 mm) Y stroke over a larger envelope.

The sub-spindle is an option, not part of the base machine. Its rows in the table describe a 6.5 in (165 mm) chuck on an A2-5 nose, 4,100 rpm, a 2.31 in (58.7 mm) bore and synchronised running with the main spindle up to 3,200 rpm. The two-stage automatic parts catcher and the automatic door are options as well. Haas lists a starting price of US$151,995.

Full Specifications

Parameter	Value
Chuck Size	12 in (305 mm)
Max Swing	21 in (533 mm)
Max Turning Diameter	13.75 in (349 mm)
Max Turning Length	32.5 in (826 mm)
Bar Capacity	4 in (102 mm)
Distance Between Centers	32.5 in (826 mm)
X-Axis Travel	9.4 in (239 mm)
Y-Axis Travel	± 2 in (± 51 mm)
Z-Axis Travel	32.5 in (826 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	A2-8
Spindle Motor Power	40 hp (29.8 kW)
Max Spindle Speed	3,200 rpm
Spindle Torque	425 ft-lbf @ 325 rpm (576 N·m @ 325 rpm)
Spindle Torque (optional gearbox)	1,400 ft-lbf @ 150 rpm (1,898 N·m @ 150 rpm)
Spindle Bore	4.62 in (117.3 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	6.5 in (165 mm)
Sub Spindle Nose	A2-5
Sub Spindle Speed	4,100 rpm
Sub Spindle Max Sync Speed with Main Spindle	3,200 rpm
Sub Spindle Chuck Throat	Ø 1.81 in × 1.6 in DEEP (Ø 46 mm × 40.6 mm DEEP)
Sub Spindle Drawbar Adapter Bore	Ø 1.81 in × 3.09 in DEEP (Ø 46 mm × 78.5 mm DEEP)
Sub Spindle Drawbar Bore	Ø 1.03 in × 4.91 in DEEP
Sub Spindle Spindle Bore	2.31 in (58.7 mm)
Sub Spindle Integrated Brake Torque	17 ft-lbf (23 N·m)
Sub Spindle Spindle Orientation Accuracy	± 0.02 °
Sub Spindle Rapids	400 ipm
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	171 × 90 × 98 in (435 × 229 × 249 cm)
Shipping Export Pallet	171 × 90 × 98 in (435 × 229 × 249 cm)
Machine Weight	14,300 lb (6,487 kg)

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

Strengths & Limitations

Strengths

BMT65 live tooling at 4,000 rpm, above the 3,200 rpm of the main spindle
Interpolating C axis with 0.01° positioning and a 250 ft-lbf (339 N·m) brake
40 hp (29.8 kW) main spindle with a 4.62 in (117.3 mm) bore on a Y-axis machine
32.5 in (826 mm) of turning length; the ST-28Y has 22.5 in (572 mm)
Safe Run, HaasConnect remote monitoring, HaasDrop and WiFi come standard

Limitations

The sub-spindle is optional, so machining the back of a part in the same cycle is not part of the base machine
Rapids on X and Y are 472 ipm (12 m/min); only Z reaches 945 ipm (24 m/min)
The optional sub-spindle's integrated brake holds 17 ft-lbf (23 N·m), light for milling on the second side
Y thrust of 2,300 lbf (10,231 N) is well under the 4,100 lbf (18,238 N) on X, which limits heavy off-centre drilling

Best For

Turn-mill work from bar up to 4 in (102 mm) Chucked parts up to 13.75 in (349 mm) with milled flats, slots or bolt circles Small drills and end mills at up to 4,000 rpm Front-and-back machining with the optional sub-spindle

Frequently Asked Questions

01 What live tooling does the ST-35Y use?

BMT65 live tooling with a maximum speed of 4,000 rpm. The turret has 12 stations and Haas lists it as accepting any combination of OD and ID tools, varying with the turret. Rear clearance for boring bars is 4 in (102 mm).

02 Is the sub-spindle included on the ST-35Y?

No. Haas lists the sub-spindle as optional. When ordered, it has a 6.5 in (165 mm) chuck on an A2-5 nose, runs to 4,100 rpm, synchronises with the main spindle up to 3,200 rpm and has a 2.31 in (58.7 mm) bore. Its integrated brake torque is 17 ft-lbf (23 N·m), orientation accuracy is ± 0.02° and its rapid rate is 400 ipm.

03 How does the ST-35Y differ from the ST-28Y?

In envelope. The ST-28Y turns 11.75 in (298 mm) in diameter and 22.5 in (572 mm) in length. The ST-35Y turns 13.75 in (349 mm) and 32.5 in (826 mm). Both have a 12 in (305 mm) chuck, 4 in (102 mm) of bar capacity, a 40 hp (29.8 kW) spindle at 3,200 rpm, ± 2 in (± 51 mm) of Y travel and 4,000 rpm live tools.

04 What torque is available for heavy turning?

The spindle gives 425 ft-lbf (576 N·m) at 325 rpm from 40 hp (29.8 kW). Haas lists a gearbox as an option, and with it the figure is 1,400 ft-lbf (1,898 N·m) at 150 rpm. Maximum spindle speed is 3,200 rpm. Z-axis thrust is 5,100 lbf (22,686 N).

05 What is the Y-axis travel and thrust?

Travel is ± 2 in (± 51 mm) and maximum thrust is 2,300 lbf (10,231 N). Y and X rapid at 472 ipm (12 m/min), Z at 945 ipm (24 m/min). The stroke is sized for features around the centreline; larger patterns are produced by combining Y with C-axis rotation.