Haas ST-28L
Image: haascnc.com, Haas Automation
Key Specifications
X Travel
Z Travel
Max Spindle
Rapid Traverse
Spindle Power
Max Turn Length
How much does the Haas ST-28L cost?
Manufacturer list price
As published by Haas Automation, verified 2026-10-02. Options, tooling, freight and installation are extra.
Overview
The Haas ST-28L combines 4 in (102 mm) of bar capacity with a 42.5 in (1,080 mm) bed. It is a two-axis lathe with a 12 in (305 mm) chuck, a 4.62 in (117.3 mm) spindle bore on an A2-8 nose, and a 40 hp (29.8 kW) spindle making 425 ft-lbf (576 N·m) at 325 rpm.
Its nearest neighbours trade bore for diameter. The ST-30 and ST-30L turn up to 15 in (381 mm) but pass only 3 in (76 mm) bar through a 3.5 in (88.9 mm) bore, with 300 ft-lbf (407 N·m) at 500 rpm. Against the ST-30 this machine stops at 13 in (330 mm) of turning diameter and gives about 42% more torque. In length it sits between them: the ST-30 turns 32.5 in (826 mm) and the ST-30L 62.5 in (1,588 mm).
The combination suits long, thick stock such as tube, cylinder barrels and rods, and heavy shafts turned from 4 in bar. Top speed is 3,200 rpm, which is ample at those diameters and limiting on small ones. X travel is 9.4 in (239 mm), rapids are 945 ipm (24 m/min), and thrust is 4,100 lbf (18,238 N) on X and 5,100 lbf (22,686 N) on Z.
The 12-station BOT turret takes OD and ID tools in any combination, and the 4 in (102 mm) of clearance behind it for boring bars matters on a machine likely to bore deep into tube. With a BMT65 turret the maximum turning diameter is 11.75 in (298 mm), less than the chuck size.
The table gives no tailstock, steady-rest or sub-spindle rows for this model, so settle part support with Haas before ordering. Weight is 12,000 lb on a 190 × 90 × 90 in (483 × 229 × 229 cm) pallet, and Haas lists a starting price of US$120,995.
Full Specifications
| Parameter | Value |
|---|---|
| Chuck Size | 12 in (305 mm) |
| Max Swing | 21 in (533 mm) |
| Max Turning Diameter | 13 in (330 mm) |
| Max Turning Diameter with Bmt65 Turret | 11.75 in (298 mm) |
| Max Turning Length | 42.5 in (1,080 mm) |
| Bar Capacity | 4 in (102 mm) |
| X-Axis Travel | 9.4 in (239 mm) |
| Z-Axis Travel | 42.5 in (1,080 mm) |
| Rapid Traverse Rate | 945 ipm (24 m/min) |
| Max Thrust X | 4,100 lbf (18,238 N) |
| Max Thrust Z | 5,100 lbf (22,686 N) |
| Spindle Nose | A2-8 |
| Spindle Motor Power | 40 hp (29.8 kW) |
| Max Spindle Speed | 3,200 rpm |
| Spindle Torque | 425 ft-lbf @ 325 rpm (576 N·m @ 325 rpm) |
| Spindle Bore | 4.62 in (117.3 mm) |
| Turret Stations | 12-Station BOT |
| Turret OD Vs ID Tools | Any Combination (will vary with turret) |
| Turret Boring Bar Rear Clearance | 4 in (102 mm) |
| Coolant Capacity | 55 gal (208 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 |
| Shipping Domestic Pallet | 190 × 90 × 90 in (483 × 229 × 229 cm) |
| Shipping Export Pallet | 190 × 90 × 90 in (483 × 229 × 229 cm) |
| Machine Weight | 12,000 lb |
Specifications sourced from haascnc.com — verified 2026-10-02
Strengths & Limitations
Strengths
- 4 in (102 mm) of bar capacity over 42.5 in (1,080 mm) of turning length
- 425 ft-lbf (576 N·m) at 325 rpm, about 42% more torque than the ST-30
- 4.62 in (117.3 mm) spindle bore on an A2-8 nose
- 945 ipm (24 m/min) rapids on both axes; on the Y-axis ST-28LY the X rapid is 472 ipm (12 m/min)
- 12-station BOT turret with 4 in (102 mm) of rear clearance for boring bars
Limitations
- Maximum turning diameter is 13 in (330 mm); the ST-30 and ST-30L turn 15 in (381 mm)
- Spindle speed is limited to 3,200 rpm, which holds back small-diameter work
- No live tooling, C axis or Y axis in the table; the ST-28LY has ± 2 in (± 51 mm) of Y and 4,000 rpm live tools
- No tailstock or steady-rest figures are listed for a machine with 42.5 in (1,080 mm) of turning length
- A BMT65 turret reduces the turning diameter to 11.75 in (298 mm), below the 12 in (305 mm) chuck
Best For
Frequently Asked Questions
01
The ST-28L has the larger bore: 4 in (102 mm) of bar capacity and 425 ft-lbf (576 N·m), with a 13 in (330 mm) turning diameter over 42.5 in (1,080 mm). The ST-30 and ST-30L take 3 in (76 mm) bar and turn 15 in (381 mm), at 32.5 in (826 mm) and 62.5 in (1,588 mm) of length. X travel is 9.4 in (239 mm) on all three.
02
The spindle bore is 4.62 in (117.3 mm) and bar capacity is 4 in (102 mm), on an A2-8 nose with a 12 in (305 mm) chuck. The spindle is rated 40 hp (29.8 kW) with 425 ft-lbf (576 N·m) at 325 rpm and a 3,200 rpm maximum.
03
Not as listed. Its table has X and Z only, with no live-tool or C-axis rows. The ST-28LY is the same bed length with ± 2 in (± 51 mm) of Y travel and live tools at 4,000 rpm; it turns 11.75 in (298 mm) in diameter and weighs 12,700 lb (5,760 kg).
04
The table lists a 12-station BOT turret that accepts OD and ID tools in any combination, depending on the turret, with 4 in (102 mm) of rear clearance for boring bars. It gives a second turning diameter of 11.75 in (298 mm) for a BMT65 turret, against 13 in (330 mm) otherwise.
05
Power is 220 VAC three-phase at 70 A or 440 VAC at 35 A. Air is 4 scfm at 100 psi (113 L/min at 6.9 bar), minimum 80 psi (5.5 bar). The machine weighs 12,000 lb and ships on a 190 × 90 × 90 in (483 × 229 × 229 cm) pallet, so check door openings and forklift or crane capacity.
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