The Haas Automation ST-55Y is an industrial-grade CNC Lathes & Turning Centers powered by the Standard CNC. a top spindle speed of 1,000 RPM, and a 3-axis kinematic layout. It supports standardized digital factory monitoring via MTConnect.
Haas ST-55Y: long-bed Y-axis lathe with 80 in (2,032 mm) of Z travel, a 12.5 in (318 mm) spindle bore, 4,000 rpm live tools and 4,250 ft-lbf.
| 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 | 1,000 RPM |
| Spindle Motor Rating | 55.0 kW |
| Spindle Taper Interface | Standard |
| Industrial IoT Protocol | MTConnect ANSI/MTC1.4 Compliant (Ethernet/TCP) |
| Max Swing | 35.5 in (902 mm) |
| Max Turning Diameter | 27.5 in (699 mm) |
| Max Turning Length | 80 in (2,032 mm) |
| X-Axis Travel | 20 in (508 mm) |
| Y-Axis Travel | ± 3 in (± 76 mm) |
| Z-Axis Travel | 80 in (2,032 mm) |
| Rapid Traverse X | 472 ipm (12 m/min) |
| Rapid Traverse Y | 472 ipm (12 m/min) |
| Rapid Traverse Z | 320 ipm (8.1 m/min) |
| Max Thrust X | 5,500 lbf (24,465 N) |
| Max Thrust Y | 2,300 lbf (10,231 N) |
| Max Thrust Z | 9,000 lbf (40,034 N) |
| Spindle Nose | A1-20 Front & Rear |
| Spindle Drive | 2-Speed Gearbox |
| Spindle Motor Power | 55 hp (41 kW) |
| Max Spindle Speed | 1,000 rpm |
| Spindle Torque | 4,250 ft-lbf @ 30 rpm (5,762 N·m @ 30 rpm) |
| Spindle Bore | 12.5 in (318 mm) |
| C Axis Speed | 49 rpm |
| C Axis Max Rating | 5 hp (3.7 kW) |
| C Axis Positioning | 0.01 ° |
| C Axis Brake Holding Torque | 450 ft-lbf (610 N·m) |
| C Axis Control Type | Interpolated Motion and Positioning |
| Tailstock Taper | MT6 |
| Tailstock Travel | 84.5 in (2,146 mm) |
| Tailstock Max Thrust Acme | 3,000 lbf (13,345 N) |
| Tailstock Min Thrust Acme | 200 lbf (890 N) |
| Turret Stations | 12 |
| Turret Od Vs Id Tools | Any Combination (will vary with turret) |
| Turret Tooling | BMT75 |
| Live Tool Speed | 4,000 rpm |
| Live Tooling | BMT75 |
| Coolant Capacity | 95 gal (360 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, 105 A |
| Electrical High | 440 VAC 3-phase, 53 A |
Haas Automation publishes a list price of US$419,995 for the Haas ST-55Y (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-55y#price; the request is passed to Haas Automation or an authorised dealer.
Only in the spindle. Travels, rapids and live-tool speed are the same. The ST-40LY has an A2-8 nose, a 4.62 in (117.3 mm) bore, 40 hp (29.8 kW), 1,400 ft-lbf (1,898 N·m) at 150 rpm and a 2,400 rpm top speed. The ST-55Y has an A1-20 nose front and rear, a 12.5 in (318 mm) bore, 55 hp (41 kW), 4,250 ft-lbf (5,762 N·m) at 30 rpm and a 1,000 rpm top speed.
Maximum turning length is 80 in (2,032 mm), equal to the Z travel, at up to 27.5 in (699 mm) in diameter. The MT6 tailstock has 84.5 in (2,146 mm) of travel and 200 lbf (890 N) to 3,000 lbf (13,345 N) of thrust. Longer stock can extend back through the 12.5 in (318 mm) spindle bore.
Y travel is ± 3 in (± 76 mm) with 2,300 lbf (10,231 N) of thrust. The C axis has a 5 hp (3.7 kW) maximum rating, a top speed of 49 rpm and 0.01° positioning, and is listed for interpolated motion and positioning. Brake holding torque is 450 ft-lbf (610 N·m). Live tooling is BMT75 at up to 4,000 rpm.
X and Y rapid at 472 ipm (12 m/min) and Z at 320 ipm (8.1 m/min). Thrust is 5,500 lbf (24,465 N) on X, 2,300 lbf (10,231 N) on Y and 9,000 lbf (40,034 N) on Z. Live tools run to 4,000 rpm and the main spindle to 1,000 rpm.
Power is 220 VAC three-phase at 105 A or 440 VAC three-phase at 53 A. Air consumption is 4 scfm at 100 psi (113 L/min at 6.9 bar), and supply pressure must be at least 80 psi (5.5 bar). The coolant tank holds 95 gal (360 L). Machine weight and shipping dimensions are not in the table.
