Haas ST-20LY

$90,000 - $120,000 Updated 2026-03-16

Key Specifications

Max Spindle

4,000 RPM

Tool Capacity

12-station BMT-65

Spindle Power

14.9 kW (20 hp)

max swing

533 mm (21 in)

max cutting diameter

298 mm (11.75 in)

max cutting length

813 mm (32 in)

Overview

The Haas ST-20LY is the long-bed, Y-axis variant of the redesigned ST-20 platform. It takes the same re-engineered castings as the standard ST-20Y and stretches the Z-axis to 813 mm (32 in), giving shops 241 mm (9.5 in) of extra turning length for shafts, long fittings, and barstock parts that won't fit in the standard bed.

The spindle is identical to the ST-20Y: an A2-6 nose delivering 14.9 kW (20 hp) and 203 Nm (150 ft-lb) at 500 RPM, topping out at 4,000 RPM. Max swing is 533 mm (21 in) over the cross slide with a cutting diameter of 298 mm (11.75 in). The 63.5 mm (2.5 in) drawtube bore handles common bar stock sizes without a bore upgrade.

Y-axis travel is +/-50.8 mm (+/-2.0 in), same as the shorter ST-20Y. The 12-station BMT-65 turret runs live tooling at 6,000 RPM with 3.7 kW (5 hp), so cross-drilling, flat milling, and tapping happen on the lathe instead of requiring a second setup on a VMC.

Haas runs the NGC control on every machine they build. If your operators already know the Haas mill side, the transition to the lathe is measured in hours, not weeks. Conversational programming, G-code, and canned cycles are all there.

Priced at $90,000-$120,000 configured, the ST-20LY fills a gap for shops that need Y-axis capability on longer parts without jumping to the ST-30 platform. It's the sweet spot between the standard ST-20Y and the heavier ST-30LY for medium-length work.

Full Specifications

Parameter	Value
Max Swing	533 mm (21 in)
Max Cutting Diameter	298 mm (11.75 in)
Max Cutting Length	813 mm (32 in)
Max Spindle Speed	4,000 RPM
Spindle Motor Power	14.9 kW (20 hp)
Spindle Torque	203 Nm (150 ft-lb) @ 500 RPM
Spindle Nose	A2-6
Spindle Bore	88.9 mm (3.5 in)
Chuck Size	210 mm (8.3 in)
Bar Capacity	63.5 mm (2.5 in)
X Axis Travel	213 mm (8.4 in)
Y Axis Travel	±50.8 mm (±2.0 in)
Z Axis Travel	813 mm (32 in)
Rapid Traverse X Y	12 m/min (472 in/min)
Rapid Traverse Z	24 m/min (945 in/min)
Tool Capacity	12-station BMT-65
Live Tool Speed	6,000 RPM
Live Tool Power	3.7 kW (5 hp)
C Axis Accuracy	±0.01°
Coolant Capacity	208 L (55 gal)
CNC Control	Haas Next Generation Control (NGC)

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

Strengths & Limitations

Strengths

813 mm (32 in) Z-axis travel handles shafts and long fittings that won't fit the standard ST-20Y bed
Same 63.5 mm (2.5 in) drawtube bore and Y-axis capability as the standard model at only a modest price bump
BMT-65 turret with 6,000 RPM live tooling enables done-in-one work on longer parts
NGC control consistency across the Haas lineup minimizes operator retraining costs
$30-50K cheaper than comparable Mazak or Okuma long-bed Y-axis lathes
Strong Haas dealer network with same-day availability on common wear items

Limitations

14.9 kW (20 hp) spindle is modest for heavy roughing in stainless or Inconel on longer parts
No sub-spindle option means back-working operations still require a second setup
Longer bed increases footprint without adding rigidity — not ideal for heavy interrupted cuts
3.7 kW (5 hp) live tooling limits aggressive milling operations
Y-axis turret alignment drift reported on the ST-20 platform may require periodic service

Best For

Shaft work and long fittings exceeding 572 mm that won't fit the standard ST-20Y Job shops running mixed part families with occasional long-part requirements Production bar work needing Y-axis cross-drilling and milling on parts up to 813 mm Shops already on the Haas NGC platform looking to add long-bed Y-axis capability Hydraulic cylinder, pump shaft, and drive shaft manufacturers

Frequently Asked Questions

01 What is the difference between the Haas ST-20Y and ST-20LY?

The ST-20LY adds 241 mm (9.5 in) of Z-axis travel, going from 572 mm to 813 mm (32 in). The spindle, Y-axis, turret, and live tooling are identical. The longer bed adds modest cost and footprint. Choose the LY variant when your part lengths regularly exceed the standard bed.

02 What does a Haas ST-20LY cost?

Base price starts around $90,000. With typical options like live tooling, tailstock, parts catcher, and chip conveyor, expect $105,000-$120,000 configured. The long-bed premium over the standard ST-20Y is roughly $5,000-$8,000.

03 Can the ST-20LY run with a bar feeder?

Yes. The 63.5 mm (2.5 in) drawtube bore accepts standard bar feeders. The longer bed is particularly well-suited to bar feeder operation on longer cutoff lengths, reducing the number of bar changes per shift.

04 Is the ST-20LY rigid enough for heavy cuts on long parts?

For aluminum and mild steel at moderate depths of cut, the ST-20LY handles long parts well. For aggressive roughing in stainless or tough alloys on long, slender shafts, you may find the 14.9 kW spindle and lighter casting limiting compared to the ST-30 platform.