Haas Automation CNC Lathes / Turning Centers

Haas ST-35

List US$104,995 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)

Z Travel

32.5 in (826 mm)

Max Spindle

3,200 rpm

Rapid Traverse

945 ipm (24 m/min)

Spindle Power

40 hp (29.8 kW)

Max Turn Length

32.5 in (826 mm)

How much does the Haas ST-35 cost?

Manufacturer list price

US$104,995

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

Overview

The Haas ST-35 is a two-axis turning center built around a big-bore spindle: a 12 in (305 mm) chuck on an A2-8 nose, a 4.62 in (117.3 mm) spindle bore and 4 in (102 mm) of bar capacity. It turns up to 15 in (381 mm) in diameter and 32.5 in (826 mm) long under a 21 in (533 mm) swing.

Its envelope matches the ST-30, which also turns 15 in (381 mm) by 32.5 in (826 mm) on 9.4 in (239 mm) of X travel. What changes is the headstock. The ST-30 has a 10 in (254 mm) chuck, an A2-6 nose, 3 in (76 mm) of bar capacity and 30 hp (22.4 kW); the ST-35 has the 12 in chuck, 40 hp (29.8 kW) and passes 4 in bar. The ST-28L carries the same spindle figures as this machine but turns 13 in (330 mm) in diameter over 42.5 in (1,080 mm), so it trades diameter for length.

Spindle output is 425 ft-lbf (576 N·m) at 325 rpm with a 3,200 rpm top speed. For heavy cuts in large-diameter steel, Haas lists an optional gearbox that raises torque to 1,400 ft-lbf (1,898 N·m) at 150 rpm. Axis thrust is 4,100 lbf (18,238 N) on X and 5,100 lbf (22,686 N) on Z, and the rapid rate is 945 ipm (24 m/min).

The turret is a 12-station BOT that takes any combination of OD and ID tools, with 4 in (102 mm) of boring-bar clearance behind it. The table also gives 13.75 in (349 mm) as the maximum turning diameter when a BMT65 turret is fitted. A sub-spindle is optional, and its rows in the table (6.5 in (165 mm) chuck, A2-5 nose, 4,100 rpm) describe that option, not the base machine. The two-stage automatic parts catcher and the automatic door are options too.

WiFi, HaasDrop wireless file transfer, Safe Run and HaasConnect remote monitoring are standard. Haas lists a starting price of US$104,995.

Full Specifications

Parameter	Value
Chuck Size	12 in (305 mm)
Max Swing	21 in (533 mm)
Max Turning Diameter	15 in (381 mm)
Max Turning Diameter with Bmt65 Turret	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)
Z-Axis Travel	32.5 in (826 mm)
Rapid Traverse Rate	945 ipm (24 m/min)
Max Thrust X	4,100 lbf (18,238 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)
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 (Ø 26.2 mm × 124.7 mm 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 (10 m/min)
Turret Stations	12-Station BOT
Turret OD Vs ID Tools	Any Combination (will vary with turret)
Turret Boring Bar Rear Clearance	4 in (102 mm)
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 × 92 in (435 × 229 × 234 cm)
Shipping Export Pallet	171 × 90 × 92 in (435 × 229 × 234 cm)
Machine Weight	14,300 lb (6,487 kg)

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

Strengths & Limitations

Strengths

4.62 in (117.3 mm) spindle bore and 4 in (102 mm) bar capacity behind a 12 in (305 mm) chuck
40 hp (29.8 kW) and 425 ft-lbf (576 N·m) at 325 rpm; the ST-30 on the same envelope has 30 hp (22.4 kW) and 300 ft-lbf (407 N·m) at 500 rpm
Optional gearbox raises spindle torque to 1,400 ft-lbf (1,898 N·m) at 150 rpm
Z thrust of 5,100 lbf (22,686 N) and X thrust of 4,100 lbf (18,238 N) for heavy drilling and facing
WiFi, HaasDrop, Safe Run and HaasConnect remote monitoring are standard

Limitations

Top speed is 3,200 rpm, which limits surface speed on small diameters; the ST-30 runs to 3,400 rpm
Fitting a BMT65 turret reduces the maximum turning diameter from 15 in (381 mm) to 13.75 in (349 mm)
Sub-spindle, gearbox, two-stage parts catcher and automatic door are all extra-cost options
The table lists no Y axis, C axis or live-tool figures for this model, so milled features need a second operation

Best For

Bar work up to 4 in (102 mm) through the 4.62 in (117.3 mm) bore Chucked parts up to 15 in (381 mm) in diameter Shafts and tube up to 32.5 in (826 mm) long Heavy roughing in steel with the optional gearbox

Frequently Asked Questions

01 How does the ST-35 differ from the ST-30?

Only in the spindle and workholding. The ST-30 has a 10 in (254 mm) chuck, an A2-6 nose, a 3.5 in (88.9 mm) bore, 3 in (76 mm) of bar capacity, 30 hp (22.4 kW), 300 ft-lbf (407 N·m) at 500 rpm and 3,400 rpm. The ST-35 has a 12 in (305 mm) chuck, an A2-8 nose, a 4.62 in (117.3 mm) bore, 4 in (102 mm) of bar capacity, 40 hp (29.8 kW), 425 ft-lbf (576 N·m) at 325 rpm and 3,200 rpm. Turning diameter, turning length and X travel are the same on both.

02 What does the optional gearbox change on the ST-35?

Low-speed torque. Without it the spindle peaks at 425 ft-lbf (576 N·m) at 325 rpm. With the gearbox the table gives 1,400 ft-lbf (1,898 N·m) at 150 rpm. That matters on parts near the 15 in (381 mm) turning limit, where the right surface speed is reached at low rpm and the cut needs torque more than speed.

03 Can the ST-35 be ordered with a sub-spindle?

Yes, as an option. The sub-spindle rows in the table describe a 6.5 in (165 mm) chuck on an A2-5 nose, 4,100 rpm maximum and synchronised running with the main spindle up to 3,200 rpm. Its bore is 2.31 in (58.7 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). None of that is on the base machine.

04 What turret does the ST-35 have?

A 12-station BOT turret. Haas lists it as taking any combination of OD and ID tools, with the note that this varies with the turret, and gives 4 in (102 mm) of rear clearance for boring bars. The table also quotes a 13.75 in (349 mm) maximum turning diameter with a BMT65 turret, against 15 in (381 mm) as listed for the base machine.

05 What power and air does the ST-35 need?

Three-phase power at either 220 VAC and 70 A or 440 VAC and 35 A. Compressed air consumption is 4 scfm at 100 psi (113 L/min at 6.9 bar), and supply pressure must not fall below 80 psi (5.5 bar). The coolant tank holds 55 gal (208 L).