Haas Automation CNC Lathes / Turning Centers

Haas ST-40LY

List US$292,995 Specs verified 2026-10-02 · haascnc.com Updated 2026-10-02

Image: haascnc.com, Haas Automation

Key Specifications

X Travel

20 in (508 mm)

Y Travel

± 3 in (± 76 mm)

Z Travel

80 in (2,032 mm)

Max Spindle

2,400 rpm

Spindle Power

40 hp (29.8 kW)

Max Turn Length

80 in (2,032 mm)

How much does the Haas ST-40LY cost?

Manufacturer list price

US$292,995

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

Overview

The Haas ST-40LY combines an 80 in (2,032 mm) bed with a Y axis, a C axis and BMT75 live tooling, on a lathe that turns up to 27.5 in (699 mm) in diameter. Y travel is ± 3 in (± 76 mm) and the live tools run to 4,000 rpm.

Large, long parts are slow and risky to re-fixture, and that is the argument for this configuration: mill the keyway, drill the cross-holes and cut the flats while the shaft is still between the chuck and the tailstock. The C axis interpolates and positions to 0.01°, turns at up to 49 rpm on a 5 hp (3.7 kW) rating, and is held by a 21.5 in (546 mm) brake with 450 ft-lbf (610 N·m) of holding torque.

Compared with the two-axis ST-40L, the Y axis takes turning diameter from 30 in (762 mm) down to 27.5 in (699 mm) and X rapid from 710 ipm (18 m/min) down to 472 ipm (12 m/min). Y moves at 472 ipm as well, and Z at 320 ipm (8.1 m/min). Y thrust is 2,300 lbf (10,231 N) against 5,500 lbf (24,465 N) on X and 9,000 lbf (40,034 N) on Z.

The turret has 12 BMT75 stations and indexes in 2 s. Turning output is 40 hp (29.8 kW), 1,400 ft-lbf (1,898 N·m) at 150 rpm and 2,400 rpm, with an XP option listed at 55 hp (41 kW) and 2,100 ft-lbf (2,847 N·m) at 150 rpm. The MT5 tailstock travels 84.5 in (2,145 mm) and pushes with 200 lbf (890 N) to 3,000 lbf (13,345 N).

Haas lists a starting price of US$292,995. The table for this model carries no weight or shipping dimensions, so get those from Haas before planning the foundation and rigging.

Full Specifications

Parameter	Value
Chuck Size	15 in (381 mm)
Max Swing	35.5 in (902 mm)
Max Turning Diameter	27.5 in (699 mm)
Max Turning Length	80 in (2,032 mm)
Bar Capacity	4 in (102 mm)
X-Axis Travel	20 in (508 mm)
Y-Axis Travel	± 3 in (± 76 mm)
Z-Axis Travel	80 in (2,032 mm)
Rapid Traverse X	472 ipm (12 m/min)
Rapid Traverse Y	472 ipm (12 m/min)
Rapid Traverse Z	320 ipm (8.1 m/min)
Max Thrust X	5,500 lbf (24,465 N)
Max Thrust Y	2,300 lbf (10,231 N)
Max Thrust Z	9,000 lbf (40,034 N)
Spindle Nose	A2-8
Spindle Motor Power	40 hp (29.8 kW)
Max Spindle Speed	2,400 rpm
Spindle Torque	1,400 ft-lbf @ 150 rpm (1,898 N·m @ 150 rpm)
Spindle Bore	4.62 in (117.3 mm)
Xp Option Drive System	2-Speed Gearbox
Xp Option Max Rating	55 hp (41 kW)
Xp Option Max Speed	2,400 rpm
Xp Option Max Torque	2,100 ft-lbf @ 150 rpm (2,847 N·m @ 150 rpm)
Xp Option Input AC Voltage Low	220 VAC
Xp Option Full Load Amps Low	105 A
Xp Option Input AC Voltage High	440 VAC
Xp Option Full Load Amps High	53 A
C Axis Speed	49 rpm
C Axis Max Rating	5 hp (3.7 kW)
C Axis Positioning	0.01 °
C Axis Brake Diameter	21.5 in (546 mm)
C Axis Brake Holding Torque	450 ft-lbf (610 N·m)
C Axis Control Type	Interpolated Motion and Positioning
Tailstock Taper	MT5
Tailstock Travel	84.5 in (2,145 mm)
Tailstock Max Thrust Acme	3,000 lbf (13,345 N)
Tailstock Min Thrust Acme	200 lbf (890 N)
Turret Stations	12
Turret OD Vs ID Tools	Any Combination (will vary with turret)
Turret Index Time	2 s
Turret Boring Bar Rear Clearance From Turret Face	4.5 in (114 mm)
Turret Tooling	BMT75
Live Tool Speed	4,000 rpm
Live Tooling	BMT75
Coolant Capacity	95 gal (360 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

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

Strengths & Limitations

Strengths

± 3 in (± 76 mm) of Y travel on an 80 in (2,032 mm) bed
BMT75 live tooling at 4,000 rpm with a 2 s turret index
C-axis brake of 21.5 in (546 mm) diameter with 450 ft-lbf (610 N·m) of holding torque
MT5 tailstock with 84.5 in (2,145 mm) of travel, so long shafts stay supported while they are milled
1,400 ft-lbf (1,898 N·m) at 150 rpm, or 2,100 ft-lbf (2,847 N·m) with the XP option

Limitations

Turning diameter is 27.5 in (699 mm), down from 30 in (762 mm) on the ST-40L
The C axis tops out at 49 rpm and 5 hp (3.7 kW), which suits positioning and light contouring more than heavy C-axis milling
Z rapid of 320 ipm (8.1 m/min) across 80 in (2,032 mm) of travel
No machine weight or shipping size is listed for this model

Best For

Long shafts with keyways, flats and cross-drilled holes Turn-mill parts up to 27.5 in (699 mm) in diameter and 80 in (2,032 mm) long Off-centre features within ± 3 in (± 76 mm) of the spindle centreline Heavy parts that should stay in one setup

Frequently Asked Questions

01 What does the ST-40LY add to the ST-40L?

A Y axis with ± 3 in (± 76 mm) of travel, an interpolating C axis and BMT75 live tools at 4,000 rpm. The ST-40L is a two-axis machine that turns 30 in (762 mm) in diameter with a 710 ipm (18 m/min) X rapid. The ST-40LY turns 27.5 in (699 mm) and its X rapid is 472 ipm (12 m/min). Turning length, chuck, bar capacity and spindle rating are the same.

02 How capable is the C axis on the ST-40LY?

Haas lists its control type as interpolated motion and positioning, with 0.01° positioning, a 49 rpm maximum and a 5 hp (3.7 kW) rating. The brake is 21.5 in (546 mm) in diameter and holds 450 ft-lbf (610 N·m). On a part near 27.5 in (699 mm) across, a cutting force at the rim has a long lever arm, so check the holding torque against the cut before milling far from center with the spindle clamped.

03 What live tooling does the ST-40LY carry?

BMT75 live tooling at up to 4,000 rpm, in a 12-station turret that indexes in 2 s. The turret takes any combination of OD and ID tools, varying with the turret, and boring-bar rear clearance is 4.5 in (114 mm) from the turret face. The live tools run faster than the 2,400 rpm main spindle.

04 Is there a shorter Y-axis machine on the same frame?

Yes. The ST-40SY has the same ± 3 in (± 76 mm) Y travel, 27.5 in (699 mm) turning diameter and 4,000 rpm live tools with 28 in (711 mm) of turning length, and its Z rapid is 710 ipm (18 m/min). The ST-40LY's 80 in (2,032 mm) is for shaft-type parts; short, wide parts do not need it.

05 What tailstock is listed for the ST-40LY?

An MT5 tailstock with 84.5 in (2,145 mm) of travel. Thrust ranges from 200 lbf (890 N) to 3,000 lbf (13,345 N). Being able to mill and drill with the tailstock engaged is much of the value of a Y axis on a bed this long.