Haas ST-40

What the maker publishes about the current Haas ST-40

Haas describes the current ST-40 as an all-new design of its large-frame ST Series lathe. Spindle drive runs through a 2-speed gearbox, reaching 2400 rpm at 40.0 hp and 1400.0 ft-lbf at 150 rpm. The XP option lifts those figures to 55.0 hp and 2100.0 ft-lbf. The spindle nose is A2-8, the bore 4.62 in, and bar capacity 4.00 in. A 15.0 in chuck clamps through a hydraulic chucking system. Part swing reaches 35.5 in. Cutting diameter peaks at 30.00 in on the BOT turret and 27.50 in on a BMT75 turret. Axis travel is 20.00 in on X and 44.00 in on Z, both at rapids of 710 ipm, and cutting length reaches 44.0 in. Tools sit in a 12-station bolt-on turret. The tailstock, MT5 in taper, travels 42.0 in. A rear spindle nose is an option. Coolant fills a 95 gal tank.

Source: Haas Automation, September 27, 2026.

Haas ST-40 specifications

Figures as currently published; an older unit may differ in control generation and options.

1. manufacturer specification page, fetched October 14, 2026.

What fits a Haas ST-40

Each of these follows from a published specification above, which is named beside it.

Haas ST-40 equipment and options

Standard on a new Haas ST-40

• Rigid tapping

Optional on a new Haas ST-40

• Bar feeder
• Robot or automatic loader

Source: Haas Automation, October 14, 2026.

What to check on a Haas ST-40

• Spindle. The manufacturer gives a spindle speed of 2400 rpm. Run the spindle to top speed and listen for bearing noise.
• Spindle load. The manufacturer gives 29.8 kW (40.0 hp) of spindle power and 1898.0 Nm @ 150 rpm (1400.0 ft-lbf @ 150 rpm) of spindle torque. Take a heavy cut and watch the load meter.
• Spindle nose. The manufacturer gives a spindle nose of A2-8. Check that the chuck fitted to it runs true.
• Axes and way covers. The manufacturer gives X 508 mm (20.00 in) and Z 1118 mm (44.00 in) of travel. Run each axis end to end and check the way covers.
• Rapids and ballscrews. The manufacturer gives a rapid traverse of 18.0 m/min (710 ipm). Measure the backlash on each axis.
• Turret. The manufacturer gives the turret stations as 12-Station BOT. Index every station and time a full turn.
• Chuck and bar. The manufacturer gives a chuck size of 381 mm (15.0 in) and a bar capacity of 102 mm (4.00 in). Check the jaws and the grip pressure; check any bar feeder is set for that bar.
• Bed and ways. The manufacturer gives a max turning diameter of 762 mm (30.00 in) (with BOT turret) or 699 mm (27.50 in) (with BMT75 turret) and a max turning length of 1118 mm (44.0 in) (varies with workholding). Check the ways for wear near the chuck.

Haas ST-40 listing history

Where it was listed

Filed under CNC Lathes (16).

Model years seen

2022 ×5, 2021 ×6, 2019 ×5, 2017 ×3, 2015, 2014 ×4, 2013 ×7, 2012 ×6, 2011.

What Haas ST-40 listings agree on

What affects the value of a used Haas ST-40

• Options. The units we tracked split on chuck size (15 in on 8 machines, 18.5 in on 2 machines) and spindle power (40 hp on 10 machines, 55 hp on 2 machines).
• Build year. The units we tracked were built from 2011 to 2022, across 9 model years, most often 2013 (7 units).
• Against the published figures. The manufacturer gives max spindle speed 2400 rpm, spindle motor power 29.8 kW (40.0 hp), turret stations 12-Station BOT and chuck size 381 mm (15.0 in).

Looking for a Haas ST-40 for sale?

We have tracked 40 Haas ST-40 listings on 9 marketplaces (equipt.com, machinetools.com, surplusrecord.com, revelationmachinery.com, cncmachines.com, usedcnc.com, machinestation.us, premierequipment.com and theequipmenthub.com), model years 2011 to 2022. We buy Haas ST-40 machines and do not sell them.

2022 · 2022 · 2022 · 2022 · 2022 · 2021 · 2021 · 2021 · 2021 · 2021 · 2021 · 2019 · 2019 · 2019 · 2019 · 2019 · 2017 · 2017 · 2017 · 2015 · 2014 · 2014 · 2014 · 2014 · 2013 · 2013 · 2013 · 2013 · 2013 · 2013 · 2013 · 2012 · 2012 · 2012 · 2012 · 2012 · 2012 · 2011 · year not given

Every Haas ST-40 we have tracked

15 more Haas ST-40 machines

1 more listing, no year.

The Haas ST-40 among lathes and turning centers

Browse all CNC Lathes, or see every Haas machine we track.

Models related to the Haas ST-40

1. Haas ST-45: manufacturer specification page, fetched October 18, 2026.
2. Haas ST-40: manufacturer specification page, fetched October 14, 2026.