STAR SR-20J Type C CNC Swiss Lathe with Bar Feeder – Year 2014
| General Information | ||
|---|---|---|
| Manufacturer | STAR MICRONICS | |
| Model | SR-20J Type C | |
| Machine Type | CNC Swiss Type Sliding Headstock Lathe | |
| Year | 2014 | |
| Condition | Good Condition – Lightly Used | |
| Usage History | Operated only during daytime shifts for approximately 4 years | |
| Bar Feeder | Included | |
| Fire Protection System | Automatic Fire Suppression System Installed | |
| Sub-Spindle Tool Extension | Additional 3 Tool Positions Installed (Total 6 Tools on Sub Side) | |
Technical Specifications
| Specification | Metric | Imperial |
|---|---|---|
| Maximum Machining Diameter | Ø20 mm | Ø0.787 in |
| Maximum Headstock Stroke | 205 mm | 8.07 in |
| Maximum Headstock Stroke (with R.M.G.B. Unit) | 172 mm | 6.77 in |
| Number of Tools | 6 Tools | 6 Tools |
| Tool Shank Size | 12 mm | 0.472 in |
| Front Sleeve Holder Tools | 4 Tools | 4 Tools |
| Rear Sleeve Holder Tools | 4 Tools | 4 Tools |
| Maximum Drilling Capacity (4-Spindle Sleeve Holder) | Ø10 mm | Ø0.394 in |
| Maximum Tapping Capacity (4-Spindle Sleeve Holder) | M8 × P1.25 | M8 × P1.25 |
| 2-Spindle Front Sleeve Holder Tools | 2 Tools | 2 Tools |
| Maximum Drilling Capacity (2-Spindle Front Holder) | Ø8 mm | Ø0.315 in |
| Maximum Hole Depth | 100 mm | 3.94 in |
| Cross Milling Tools | 3 Tools | 3 Tools |
| Power Driven Attachment Positions | 2 Positions | 2 Positions |
| Maximum Drilling Capacity (Driven Tools) | Ø8 mm | Ø0.315 in |
| Maximum Tapping Capacity (Driven Tools) | M6 × P1.0 | M6 × P1.0 |
| Driven Tool Spindle Speed | 8,000 rpm | 8,000 rpm |
| Driven Tool Motor | 1.2 kW | 1.61 HP |
| Rapid Feed Rate | 35 m/min | 1,378 ipm |
| Main Spindle Indexing | C-Axis Control | C-Axis Control |
| Main Spindle Speed | 10,000 rpm | 10,000 rpm |
| Main Spindle Motor | 2.2 / 3.7 kW | 2.95 / 4.96 HP |
| Coolant Tank Capacity | 170 L | 44.9 gal |
| Machine Dimensions (W × D × H) | 2,250 × 1,200 × 1,700 mm | 88.58 × 47.24 × 66.93 in |
| Machine Weight | 2,200 kg | 4,850 lbs |
| Power Consumption | 5.2 kVA | 5.2 kVA |
| Noise Level | Max. 69 dB | Max. 69 dB |
Backworking Attachment Specifications
| Specification | Metric | Imperial |
|---|---|---|
| Maximum Chucking Diameter | Ø20 mm | Ø0.787 in |
| Maximum Length for Front Ejection | 80 mm | 3.15 in |
| Maximum Parts Projection Length | 30 mm | 1.18 in |
| Number of Backworking Tools | 4 Tools | 4 Tools |
| Maximum Drilling Capacity (Stationary Tool) | Ø8 mm | Ø0.315 in |
| Maximum Drilling Capacity (Driven Tool) | Ø5 mm | Ø0.197 in |
| Maximum Tapping Capacity (Stationary Tool) | M8 × P1.25 | M8 × P1.25 |
| Maximum Tapping Capacity (Driven Tool) | M4 × P0.7 | M4 × P0.7 |
| Backworking Driven Tool Speed | 8,000 rpm | 8,000 rpm |
| Backworking Driven Tool Motor | 0.5 kW | 0.67 HP |
| Sub-Spindle Indexing | C-Axis Control | C-Axis Control |
| Sub-Spindle Speed | 8,000 rpm | 8,000 rpm |
| Sub-Spindle Motor | 1.5 / 2.2 kW | 2.01 / 2.95 HP |
