Haas ST-35LY

$135,000 - $170,000 Updated 2026-03-19

Key Specifications

Max Spindle

3,200 RPM

Spindle Taper

A2-8

Tool Capacity

12 Stations

Weight

8,300 kg (18,300 lb)

Spindle Power

40.0 hp

max cutting diameter

13.75 in

Overview

The Haas ST-35LY is the long-bed, Y-axis variant of the ST-35 big-bore platform, combining the 40 hp spindle and 102 mm (4 in) bar capacity of the ST-35 with extended Z-axis travel and full mill-turn capability. With 1,016 mm (40 in) of cutting length, a 12-station BMT-65 turret with 6,000 RPM live tooling, and +/-50.8 mm (+/-2.0 in) of Y-axis travel, this machine handles long shaft work with off-center milling, drilling, and tapping in a single setup.

The A2-8 spindle delivers 29.8 kW (40 hp) with 542 Nm (400 ft-lb) of torque at 500 RPM and a max speed of 3,200 RPM. The optional gearbox pushes torque to 1,898 Nm (1,400 ft-lb) at 150 RPM for heavy interrupted cuts on large-diameter forgings and castings. The 117.3 mm (4.62 in) spindle bore and 305 mm (12 in) chuck give this machine serious big-bore capability.

The BMT-65 live tooling turret runs at 6,000 RPM with 3.7 kW (5 hp), allowing cross-drilling, flat milling, keyway cutting, and tapping operations along the full 40-inch working length. C-axis positioning holds +/-0.01 degrees. The Y-axis eliminates the need to move long parts to a separate mill for off-center features, saving setup time and eliminating the accuracy loss from re-fixturing.

What separates the ST-35LY from the ST-30LY is the bigger bore and more power. The ST-30LY runs a 30 hp spindle with A2-8 nose and 101.6 mm bar capacity. The ST-35LY steps up to 40 hp with 542 Nm of standard torque, giving it significantly more muscle for heavy roughing on large-diameter, long workpieces. The machine weighs approximately 8,300 kg (18,300 lb), providing excellent vibration damping for long overhang cuts.

Priced at approximately $135,000-$170,000 configured, the ST-35LY is the most capable long-bed Y-axis lathe in the Haas lineup. It competes with the Mazak QT-350MSY and Okuma LB4000 EX II MY, both of which cost $50,000 or more above the Haas. For shops turning long shafts, hydraulic cylinders, and pipe fittings that also need secondary milling operations, the ST-35LY delivers big-bore mill-turn capability at the Haas price point. Specs derived from Haas ST-35Y and ST-35 published data.

Full Specifications

Parameter	Value
Max Cutting Diameter	13.75 in
Max Cutting Length	62.5 in
Max Swing Over Front Apron	806 mm (31.75 in)
Max Swing Over Cross Slide	527 mm (20.75 in)
Max Spindle Speed	3,200 RPM
Spindle Motor Power	40.0 hp
Spindle Torque	542 Nm (400 ft-lb) @ 500 RPM
Spindle Torque Optional Gearbox	1,898 Nm (1,400 ft-lb) @ 150 RPM
Spindle Nose	A2-8
Spindle Bore	4.62 in
Chuck Size	12.0 in
Bar Capacity	4.00 in
X Axis Travel	318 mm (12.5 in)
Y Axis Travel	102 mm (4.0 in) total / ±50.8 mm (±2.0 in)
Z Axis Travel	1,016 mm (40 in)
Rapid Traverse X Y	12.0 m/min (472 IPM)
Rapid Traverse Z	24.0 m/min (945 IPM)
Tool Capacity	12 Stations
Live Tooling Speed	6,000 RPM
Live Tooling Power	3.7 kW (5 hp)
C Axis Positioning	±0.01°
Machine Weight	8,300 kg (18,300 lb)
Coolant Capacity	55 gal
CNC Control	Haas Next Generation Control (NGC)
Capacities	S.A.E
Max Part Swing	21.0 in
Between Centers Max	62.5 in
Travels	S.A.E
X Axis	9.40 in
Y Axis	± 2.0 in
Z Axis	62.50 in
Feedrates	S.A.E
Rapids On X	472 ipm
Rapids On Y	472 ipm
Rapids On Z	945 ipm
Axis Motors	S.A.E
Max Thrust X	4100 lbf
Max Thrust Y	2300 lbf
Max Thrust Z	5100 lbf
Spindle	S.A.E
Spindle Taper	A2-8
Max Rating	5.0 hp
Max Speed	60 rpm
Max Torque	425.0 ft-lbf @ 325 rpm
Max Torque W Opt Gearbox	1400 ft-lbf @ 150 rpm
Main Spindle C Axis	S.A.E
Positioning	0.01 °
Brake Diameter	13.9 in
Brake Holding Torque	250 ft-lbf
Turret	S.A.E
Od Vs Id Tools	Any Combination (will vary with turret)
Boring Bar Rear Clearance	4.00 in
General	S.A.E
Air Requirements	S.A.E
Air Required	4 scfm @ 100 psi
Inline Air Hose	3/8 in
Coupler	3/8 in
Air Pressure Min	80 psi
Electrical Specification	S.A.E
Drive System	Direct Speed, Belt Drive
Input Ac Voltage Low	220 VAC
Full Load Amps Low	70 A
Input Ac Voltage High	440 VAC
Full Load Amps High	35 A
Dimensions Shipping	S.A.E
Domestic Pallet	202.0 in x 90.0 in x 92.0 in
Export Pallet	202.0 in x 90.0 in x 92.0 in
Machine Weight	13820 lb
Footrpint Without Conveyor	4750 x 1778 x 2007 mm
Maximum Part Swing	533 mm
Bar Capacity Maximum Spindle Speed	4.0", 3200-rpm
Maximum Power Rating Drive System	22.4 kW, Belt-Drive
Spindle Nose Chuck Size	A2-8, 305 mm
Maximum Cutting Diameter	349 mm
Maximum Cutting Length	1587 mm
Axis Travels	239 mm,1587 mm
Y Axis Models Axis Travels	239 mm, 101 mm,1587 mm
Bar Capacity Maximum Speed	102 mm, 3200-rpm

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

Strengths & Limitations

Strengths

40 hp spindle with 542 Nm standard torque and optional 1,898 Nm gearbox handles aggressive roughing on large-diameter, long workpieces
1,016 mm (40 in) cutting length covers long shafts, hydraulic cylinders, and extended components that shorter machines cannot reach
102 mm (4.0 in) bar capacity and 117.3 mm spindle bore handle large-diameter bar stock, tube, and pipe work
BMT-65 turret with Y-axis and 6,000 RPM live tooling provides full mill-turn capability along the entire 40-inch working length
305 mm (12 in) chuck on A2-8 nose gives heavy-duty workholding for large-diameter parts without stepping up to the ST-40 frame
Priced $50,000+ below Mazak QT-350MSY and Okuma LB4000 EX II MY long-bed equivalents

Limitations

3,200 RPM max spindle speed limits surface footage on small-diameter finishing and high-speed aluminum work
3.7 kW (5 hp) live tooling motor is shared across the ST Y-axis lineup and feels underpowered for aggressive milling on large parts
Long-bed configuration requires significantly more floor space than the standard ST-35 or ST-35Y
No sub-spindle option means parts requiring back-working need a second operation or separate machine

Best For

Long shaft production including pump shafts, drive shafts, and hydraulic cylinder components over 700 mm Oil and gas fitting manufacturers working with large-diameter pipe stock and tubular components Shops that need big-bore turning with secondary milling, drilling, and tapping on long workpieces in a single setup Heavy-duty production environments requiring 40 hp and high torque on large-diameter, extended parts Contract manufacturers running diverse part families that span short and long turning with off-center features

Frequently Asked Questions

01 What does a new Haas ST-35LY cost?

Base price starts around $135,000. Common configurations with programmable tailstock, chip conveyor, high-pressure coolant, and bar feeder interface run $150,000-$170,000. The programmable tailstock is practically required for long shaft work and adds about $5,000.

02 What is the difference between the ST-35LY and ST-35Y?

The ST-35LY is the long-bed version. Both share the same 40 hp spindle, BMT-65 turret, and bar capacity. The difference is Z-axis travel: 1,016 mm (40 in) on the ST-35LY versus approximately 660 mm (26 in) on the ST-35Y. If your parts fit within 26 inches, save money and floor space with the ST-35Y.

03 How does the ST-35LY compare to the ST-30LY?

The ST-35LY has a more powerful spindle (40 hp vs 30 hp), larger bar capacity (102 mm vs 101.6 mm), and significantly more torque (542 Nm vs 407 Nm standard). Both have 40 inches of Z-travel and Y-axis live tooling. The ST-35LY is the choice when you need more power for heavy roughing on large-diameter parts.

04 Is the programmable tailstock required?

For long shaft work, practically yes. Parts over 3-4 times their diameter in length will deflect under cutting forces without tailstock support, causing taper, chatter, and poor surface finish. The programmable tailstock positions automatically and retracts for part loading, eliminating manual intervention.