The Haas Automation ST-28Y is an industrial-grade CNC Lathes & Turning Centers powered by the Standard CNC. a top spindle speed of 3,200 RPM, and a 3-axis kinematic layout. It supports standardized digital factory monitoring via MTConnect.
Haas ST-28Y specs: a 12-inch-chuck turning centre with a 117.3 mm spindle bore, Y axis, sub spindle and a 12-station BMT65 live-tool turret.
| Standardized Parameters & Ratings | |
|---|---|
| Manufacturer (Brand) | Haas Automation (United States) |
| Machine Type | CNC Lathes & Turning Centers |
| CNC Controller System | Standard CNC |
| Number of Controlled Axes | 3-Axis Simultaneous / Positioning |
| Maximum Spindle Speed | 3,200 RPM |
| Spindle Motor Rating | 40.0 kW |
| Spindle Taper Interface | Standard |
| Approx. Machine Weight | 10,860 kg |
| Industrial IoT Protocol | MTConnect ANSI/MTC1.4 Compliant (Ethernet/TCP) |
| Chuck Size | 12 in (305 mm) |
| Max Swing | 21 in (533 mm) |
| Max Turning Diameter | 11.75 in (298 mm) |
| Max Turning Length | 22.5 in (572 mm) |
| Bar Capacity | 4 in (102 mm) |
| X-Axis Travel | 9.4 in (239 mm) |
| Y-Axis Travel | ± 2 in (± 51 mm) |
| Z-Axis Travel | 22.5 in (572 mm) |
| Rapid Traverse X | 472 ipm (12 m/min) |
| Rapid Traverse Y | 472 ipm (12 m/min) |
| Rapid Traverse Z | 945 ipm (24 m/min) |
| Max Thrust X | 4,100 lbf (18,238 N) |
| Max Thrust Y | 2,300 lbf (10,231 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) |
| C Axis Max Rating | 5 hp (3.7 kW) |
| C Axis Speed | 60 rpm |
| C Axis Positioning | 0.01 ° |
| C Axis Brake Diameter | 13.9 in (353 mm) |
| C Axis Brake Holding Torque | 250 ft-lbf (339 N·m) |
| C Axis Control Type | Interpolated Motion and Positioning |
| Sub Spindle Chuck Size | 5.3 in (135 mm) |
| Sub Spindle Nose | A2-5 |
| Sub Spindle Speed | 6,000 rpm |
| Sub Spindle Max Sync Speed With Main Spindle | 3,200 rpm |
| Sub Spindle Chuck Throat | Ø 1.3 in × 1.37 in DEEP (Ø 33 mm × 34.8 mm DEEP) |
| Sub Spindle Drawbar Bore | Ø 1 in × 4.5 in DEEP (Ø 25.4 mm × 114.3 mm DEEP) |
| Sub Spindle Spindle Bore | 1.5 in (38.1 mm) |
| Sub Spindle Integrated Brake Torque | 17 ft-lbf (23 N·m) |
| Sub Spindle Spindle Orientation Accuracy | ± 0.02 ° |
| Sub Spindle Rapids | 400 ipm (10 m/min) |
| Turret Stations | 12 |
| Turret Od Vs Id Tools | Any Combination (will vary with turret) |
| Turret Boring Bar Rear Clearance | 4 in (102 mm) |
| Live Tool Speed | 4,000 rpm |
| Live Tooling | BMT65 |
| 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 Low | 220 VAC 3-phase, 70 A |
| Electrical High | 440 VAC 3-phase, 35 A |
| Shipping Domestic Pallet | 142 × 90 × 92 in (361 × 229 × 234 cm) |
| Shipping Export Pallet | 143 × 90 × 92 in (364 × 229 × 234 cm) |
| Machine Weight | 10,860 lb (4,926 kg) |
Haas Automation publishes a list price of US$134,995 for the Haas ST-28Y (verified 2026-10-02). Options, tooling, freight and installation are extra, so a dealer quote will differ. A specific price can be requested at https://machinetoolindex.com/machines/haas-st-28y#price; the request is passed to Haas Automation or an authorised dealer.
Maximum part swing is 533 mm (21.0 in), but maximum cutting diameter is 298 mm (11.75 in) with the BMT65 turret fitted, over 572 mm (22.5 in) of cutting length. The gap between those two figures is turret clearance, and it is the detail most likely to catch someone out when quoting large flange work. Quote against the cutting diameter, not the swing.
The main spindle bore is 117.3 mm (4.62 in), with a rated bar capacity of 102 mm (4.00 in), on an A2-8 nose carrying a 305 mm (12.0 in) chuck. That bore is the specification that defines the machine: pipe, tube and heavy bar pass through the headstock rather than hanging out the back on a support.
Y travel is ±51 mm (±2.0 in) about the centreline, and the 12-station BMT65 turret drives live tooling to 4,000 rpm. The C axis positions to ±0.01° with a 3.7 kW (5.0 hp) drive, 60 rpm maximum, and a 339 Nm (250 ft-lbf) brake on a 353 mm (13.9 in) disc. That brake torque is the real limit on how hard you can mill off-centre, not the live-tool speed.
It carries a 135 mm (5.3 in) chuck on an A2-5 nose with a 38.1 mm (1.50 in) bore and runs to 6,000 rpm, so back-end work happens in-cycle rather than as a second setup. Note the bore difference - 38.1 mm against 117.3 mm on the main spindle - which confines the second operation to much smaller stock than the first.
Either 220 VAC three-phase at 70 A or 440 VAC three-phase at 35 A, plus 113.0 L/min of air at 6.9 bar (4 scfm at 100 psi) with a 5.5 bar (80 psi) minimum supply pressure. The machine weighs 4,926 kg (10,860 lb) and holds 208 L (55 gal) of coolant.
