The Star Micronics SR-20JII Type A/B is an industrial-grade CNC Lathes & Turning Centers powered by the FANUC 32i-B. a top spindle speed of 10,000 RPM, and a 3-axis kinematic layout. It supports standardized digital factory monitoring via MTConnect.
Star SR-20JII Type A/B Swiss-type lathe: 20 mm bar (23 mm optional), 10,000 rpm spindles, back working unit with 4 tools (Type A) or 8 tools with Y (Type B).
| 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 | 10,000 RPM |
| Spindle Motor Rating | 2.2 kW |
| Spindle Taper Interface | Standard |
| Approx. Machine Weight | 2,750 kg |
| Industrial IoT Protocol | MTConnect ANSI/MTC1.4 Compliant (Ethernet/TCP) |
| Max Machining Diameter | 20 mm (25/32 in), optional 23 mm (29/32 in) |
| Max Headstock Stroke | 205 mm (8 in) |
| Sub Spindle Speed | 10,000 rpm |
| Sub Spindle Power | 2.2 kW (continuous) / 3.7 kW (10min/25%ED) |
| Front Turning Tools | 6 tools (12 mm shank) |
| Sleeve Holder | 5-spindle (front 5 / rear 5 tools) |
| Back Working Unit | Type A: 4 tools / Type B: 8 tools (Y-axis) |
| Rapid Feed Rate | 35 m/min (X1, X2, Z1, Z2), 24 m/min (Y2) |
| CNC Control | FANUC 32i-B |
| Machine Weight | 2,750 kg |
| Headstock Stroke | 205 mm (8 in) |
| Max Spindle Speed | 10,000 rpm |
| Spindle Motor Power | 2.2 kW (continuous) / 3.7 kW (10min./25%ED) |
| Turning Tools | 6 tools |
| Bar Capacity | Ø20 mm (25/32 in); Optional (OP): Ø23 mm (29/32 in) |
| Rapid Traverse | 35 m/min (X1, X2, Z1, Z2); 24 m/min |
| Footprint | 2,250 × 1,200 × 1,700 mm |
Our best estimate for the Star Micronics SR-20JII Type A/B is $150,000 - $250,000. 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-sr-20jii-type-a-b#price; the request is passed to Star Micronics or an authorised dealer.
The back working unit. Type A holds 4 tools there. Type B holds 8 tools and has a Y axis on the unit, so its back tools can be positioned off the spindle centreline. Bar size, spindles, headstock stroke and front tooling are listed once for both types.
The rapid feed rate row gives 24 m/min for Y2 and 35 m/min for X1, X2, Z1 and Z2. Y2 moves are short, so the lower rate has little effect on cycle time unless a program switches between many back tools.
There are 6 front turning tools on 12 mm shanks and a 5-spindle sleeve holder with 5 tools facing the front and 5 facing the rear. The table does not list the cross-working driven tools, so ask for the tooling layout if your parts need milling from the front side.
Yes, as an option. Standard maximum machining diameter is 20 mm (25/32 in), and 23 mm (29/32 in) is listed as optional. Order the machine with that option if any of your stock is over 20 mm, and confirm the matching collets and guide bushings.
The SR-32J is the larger machine: ø32mm (1-1/4in) turning diameter, 4,100 kg, and a spindle of 8,000 rpm rated 7.5 kW continuous. The SR-20JII is listed at 20 mm (25/32 in), 2,750 kg and 10,000 rpm with 2.2 kW continuous. Both use a FANUC 32i-B control.
