The Star Micronics SK-51 Type A is an industrial-grade CNC Lathes & Turning Centers powered by the FANUC 32i-B. a top spindle speed of 5,000 RPM, and a 3-axis kinematic layout. It supports standardized digital factory monitoring via MTConnect.
Star SK-51 Type A twin-turret lathe: 51 mm (2 in) bar, two 5,000 RPM spindles at 7.5 kW continuous, 2 x 12-station turrets, 6,600 kg.
| Standardized Parameters & Ratings | |
|---|---|
| Manufacturer (Brand) | Star Micronics (Japan) |
| Machine Type | CNC Lathes & Turning Centers |
| CNC Controller System | FANUC 32i-B |
| Number of Controlled Axes | 3-Axis Simultaneous / Positioning |
| Maximum Spindle Speed | 5,000 RPM |
| Spindle Motor Rating | 7.5 kW |
| Spindle Taper Interface | Standard |
| Approx. Machine Weight | 6,600 kg |
| Industrial IoT Protocol | MTConnect ANSI/MTC1.4 Compliant (Ethernet/TCP) |
| Max Machining Diameter | 51 mm (2 in) |
| Through Spindle Bore | 52.5 mm (2-1/16 in) |
| Main Spindle Speed | 5,000 RPM |
| Main Spindle Power | 7.5 kW continuous / 11 kW (15 min) |
| Sub Spindle Speed | 5,000 RPM |
| Sub Spindle Power | 7.5 kW continuous / 11 kW (15 min) |
| Turrets | 2 x 12-station (max 2 tools per station) |
| Max Drilling Capacity | 16 mm (5/8 in) |
| CNC Control | FANUC 32i-B |
| Coolant Tank | 458 L |
| Machine Weight | 6,600kg |
| Dimensions | 2,800 x 2,070 x 2,130 mm |
| Max Turning Diameter | Ø51mm (2in.) |
| Max Spindle Speed | 5,000 min rpm |
| Spindle Motor Power | 7.5kW (continuous)/11kW (15min.) |
| Spindle Bore | Ø52.5mm (2-1/16in) |
| Turret Stations | 12 |
| Rapid Traverse X | 20m/min |
| Rapid Traverse Y | 15m/min |
| Rapid Traverse Z | 40m/min |
| Coolant Capacity | 458ℓ |
| Floor Space | 2,800mm W x 2,070mm D x 2,130mm H |
| Cnc Control | FANUC 32i-B |
| Tool Shank Size | 20 mm (25/32 in); max. 2 tools per station |
Our best estimate for the Star Micronics SK-51 Type A is $250,000 - $400,000. This is an estimate for a swiss-type lathes in this class, not a quote from Star Micronics; configuration, tooling, automation and installation move the final price substantially. A specific price can be requested at https://machinetoolindex.com/machines/star-micronics-sk-51-type-a#price; the request is passed to Star Micronics or an authorised dealer.
Maximum machining diameter is 51 mm (2 in), fed through a spindle bore of 52.5 mm (2-1/16 in). The margin between bar and bore is small, so use straight stock and a well-aligned bar feeder when running at the full diameter.
In the table, yes. Both are listed at 5,000 RPM with 7.5 kW continuous and 11 kW on the 15 min rating. That lets the back-end operation carry as much of the metal removal as the front, which is useful when balancing the two halves of a cycle.
It has two turrets of 12 stations each, and Star states a maximum of 2 tools per station. Tool shanks are 20 mm (25/32 in). How many stations are doubled up in practice depends on the holders chosen, so work that out with the tooling list for your parts.
Rapid traverse is 20 m/min on X, 15 m/min on Y and 40 m/min on Z. Z is twice as fast as X, which suits a machine that moves parts and turrets along the spindle line. Programs with a lot of Y repositioning will see less benefit.
Floor space of 2,800 mm W x 2,070 mm D x 2,130 mm H and a foundation for 6,600 kg. The coolant tank holds 458 L. The table does not state the electrical supply, and a bar feeder for 51 mm stock adds to the length, so request the installation drawing.
