Haas ST-45

$187,995 - $270,000 Updated 2026-03-12

Key Specifications

Max Spindle

1,400 RPM

Tool Capacity

12-station BOT

Spindle Power

29.8 kW (40 hp)

max part swing

902 mm (35.5 in)

max cutting diameter

762 mm (30 in) with BOT turret; 699 mm (27.5 in) with BMT75 turret

max cutting length

1,118 mm (44 in)

Overview

The Haas ST-45 is the large-bore variant of the Haas large-frame turning center family. Built on the same castings as the ST-40, the ST-45 swaps in a massive 178 mm (7.0 in) spindle bore with an A2-11 spindle nose and an 18-inch hydraulic chuck, purpose-built for tubular work, pipe fittings, flanges, and large-bore components that smaller through-bore lathes simply cannot handle. The max cutting envelope remains 762 mm (30 in) diameter by 1,118 mm (44 in) length.

The 29.8 kW (40 hp) spindle drives through a 2-speed gearbox, producing 1,898 Nm (1,400 ft-lb) of torque at 150 RPM. Max spindle speed is 1,400 RPM, lower than the ST-40's 2,400 RPM due to the larger-diameter spindle assembly and heavier chuck. An optional XP high-performance spindle bumps output to 41.0 kW (55 hp) and 2,847 Nm (2,100 ft-lb) for heavy roughing. Axis travels are 508 mm (20 in) in X and 1,118 mm (44 in) in Z, with rapids at 18.0 m/min (710 ipm) on both axes.

Starting at approximately $187,995, the ST-45 fills a critical niche for shops that need large through-bore capacity without stepping up to the even larger ST-55 platform. The 12-station BOT turret is standard, with optional BMT75 live tooling and C-axis available. For shops in oil and gas, pipeline, valve manufacturing, and heavy industrial sectors where tube and pipe work dominates, the ST-45's 7-inch bore makes it the workhorse. Specs sourced from Haas Automation published data.

Full Specifications

Parameter	Value
Max Part Swing	902 mm (35.5 in)
Max Cutting Diameter	762 mm (30 in) with BOT turret; 699 mm (27.5 in) with BMT75 turret
Max Cutting Length	1,118 mm (44 in)
Chuck Size	457 mm (18 in)
Bar Capacity	165 mm (6.5 in) with optional workholding
Spindle Nose	A2-11
Spindle Bore	178 mm (7.0 in)
Max Spindle Speed	1,400 RPM
Spindle Motor Power	29.8 kW (40 hp)
Spindle Torque	1,898 Nm (1,400 ft-lb) @ 150 RPM
Spindle Drive	2-Speed Gearbox
Xp Spindle Power	41.0 kW (55 hp)
Xp Spindle Torque	2,847 Nm (2,100 ft-lb) @ 150 RPM
X Axis Travel	508 mm (20 in)
Z Axis Travel	1,118 mm (44 in)
Rapid Traverse X	18.0 m/min (710 ipm)
Rapid Traverse Z	18.0 m/min (710 ipm)
Max Thrust X	24,465 N (5,500 lbf)
Max Thrust Z	40,034 N (9,000 lbf)
Tool Capacity	12-station BOT
Tailstock Taper	MT5
Coolant Capacity	360 L (95 gal)
Machine Weight	10,024 kg (22,100 lb) export crate
CNC Control	Haas Next Generation Control (NGC)

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

Strengths & Limitations

Strengths

7.0-inch spindle bore and A2-11 spindle nose handle large-bore tubular work, pipe, and hollow components that the ST-40's 4.62-inch bore cannot accept
Same proven castings and footprint as the ST-40, so shops familiar with the platform get large-bore capability without learning a new machine
40 hp spindle with 1,400 ft-lb of torque through a 2-speed gearbox provides ample power for heavy material removal on large-diameter workpieces
Optional XP spindle upgrade to 55 hp and 2,100 ft-lb of torque for demanding oil and gas, pipeline, and valve manufacturing applications
At ~$188K starting, offers large-bore capacity at a fraction of the cost of purpose-built oil-country lathes from Takisawa, Hwacheon, and others

Limitations

1,400 RPM max spindle speed is significantly lower than the ST-40's 2,400 RPM, limiting surface speed on smaller-diameter work and aluminum finishing
18-inch chuck and large spindle assembly add rotational inertia, resulting in longer acceleration and deceleration times between operations
Machine weight exceeding 10,000 kg requires heavy-duty rigging and floor preparation, adding to installation cost
The 7.0-inch bore specification is with optional workholding; standard bar capacity is 6.5 inches with optional setup

Best For

Oil and gas manufacturers turning pipe, couplings, flanges, and tubular components that require large through-bore capacity Valve and fitting manufacturers machining large-bore housings, bodies, and bonnets up to 762 mm (30 in) diameter Heavy industrial shops turning hollow shafts, sleeves, and cylindrical components that must pass through the spindle bore Shops already running Haas ST-40 machines that need to expand into large-bore work without changing control platforms or programming workflows

Frequently Asked Questions

01 What does a new Haas ST-45 cost?

The Haas ST-45 starts at approximately $187,995 for the base configuration. Adding the XP spindle, BMT75 live tooling turret, tailstock, chip conveyor, and high-pressure coolant can push the configured price to $240,000-$270,000. The ST-45 commands a $12,000 premium over the ST-40 for the larger-bore spindle assembly and chuck.

02 What is the difference between the ST-45 and ST-40?

The key difference is bore size: the ST-45 has a 178 mm (7.0 in) spindle bore with an A2-11 nose, while the ST-40 has a 117.3 mm (4.62 in) bore with an A2-8 nose. The ST-45 runs a lower max speed of 1,400 RPM versus 2,400 RPM on the ST-40. Cutting envelope and axis travels are identical. Choose the ST-45 for large-bore tubular work; choose the ST-40 for general large-frame turning with higher RPM.

03 Is there a long-bed version of the ST-45?

Yes, the Haas ST-45L extends the Z-axis travel to 2,032 mm (80 in) for long-shaft and pipe work. It shares the same 7.0-inch bore, A2-11 spindle, and 40 hp motor. The ST-45L starts at approximately $257,995 and is ideal for pipe threading, long couplings, and extended-length hollow components.

04 Can the ST-45 run with live tooling?

Yes, with the optional BMT75 turret and C-axis. The BMT75 turret supports 4,000 RPM live tooling with either 12 or 24 stations, enabling cross-drilling, milling, and tapping without a second setup. This is particularly valuable for valve bodies, pipe fittings, and flanges that require cross-holes and bolt patterns.