Machine Comparison
Star Micronics SB-20RII vs Star Micronics SB-16R Type G
Star Micronics vs Star Micronics · Swiss-Type Lathes
Summary
The Star Micronics SB-20RII and Star Micronics SB-16R Type G are both from Star Micronics's swiss-type lathes lineup, making this a common upgrade or lineup decision for shops already invested in the Star Micronics ecosystem. On paper, the Star Micronics SB-20RII edges ahead with advantages in 4 of the compared specifications, though real-world performance depends heavily on your specific applications and workholding. Both machines are proven performers in production environments and represent solid investments for shops in the market for a swiss-type lathe.
Specifications Comparison
| Specification | Star Micronics SB-20RII | Star Micronics SB-16R Type G |
|---|---|---|
| Control | Fanuc 0i-TF Plus | Fanuc 0i-TD (8.4" color LCD) |
| Max Machining Diameter | 20 mm (25/32 in), optional 25.4 mm (1 in) ▲ | 16 mm (5/8 in) |
| Max Headstock Stroke Guide Bush | 205 mm (8 in) | 205 mm (8 in) |
| Max Headstock Stroke Non Guide Bush | Bar diameter x 2.5 (max 50 mm) | Bar diameter x 2.5 (max 50 mm) |
| Main Spindle Speed | 10,000 RPM (8,000 RPM with 25.4mm option) | 10,000 RPM |
| Main Spindle Power | 2.2 kW continuous / 3.7 kW (10 min, 25% ED) | 2.2 kW continuous / 3.7 kW (10 min, 25% ED) |
| Sub Spindle Speed | 10,000 RPM (8,000 RPM with 25.4mm option) ▲ | 9,000 RPM |
| Sub Spindle Power | 1.5 kW continuous / 2.2 kW (15 min, 60% ED) ▲ | 0.55 kW continuous / 1.1 kW (15 min, 40% ED) |
| Turning Tools | 6 tools (12 mm) or 5 tools (16 mm) | 6 tools (12 mm) or 7 tools (10 mm) |
| Rapid Feed Rate | 35 m/min | 35 m/min (X1, Y1, Z1, X2, Z2) |
| Guide Bushing | Switchable (guide bush / non-guide bush) | Switchable (guide bush / non-guide bush) |
| Coolant Tank | 180 L | 180 L |
| Machine Weight | 2,000 kg (4,409 lb) ▲ | 1,750 kg (3,858 lb) |
| Dimensions | 2,070 x 1,095 x 1,775 mm | 2,070 x 1,177 x 1,760 mm |
| Price Range | $90,000 - $150,000 | $85,000 - $140,000 ▲ |
Advantages
Star Micronics SB-20RII
- Superior max machining diameter at 20 mm (25/32 in), optional 25.4 mm (1 in) vs 16 mm (5/8 in)
- Superior sub spindle speed at 10,000 RPM (8,000 RPM with 25.4mm option) vs 9,000 RPM
- Superior sub spindle power at 1.5 kW continuous / 2.2 kW (15 min, 60% ED) vs 0.55 kW continuous / 1.1 kW (15 min, 40% ED)
- Superior machine weight at 2,000 kg (4,409 lb) vs 1,750 kg (3,858 lb)
Star Micronics SB-16R Type G
- More competitive pricing at $85,000 - $140,000 compared to $90,000 - $150,000
- Backed by Star Micronics's dealer and service network for parts and support
- Medical device shops producing bone screws, spinal implants, dental components, and surgical instruments in the 10-16mm diameter range
Verdict
The Star Micronics SB-20RII holds a spec advantage in this comparison, but the right choice depends on your shop's priorities. If the Star Micronics SB-20RII's strengths in areas like max machining diameter and sub spindle speed align with your work, it's the clear pick. The Star Micronics SB-16R Type G may still win on dealer proximity, existing tooling compatibility, or specific features that matter most to your applications. Request quotes from both dealers and, if possible, run your actual parts on each machine before deciding.