Machine Comparison
Niles-Simmons N20 MC vs Niles-Simmons N40 MC
Niles-Simmons vs Niles-Simmons · Mill-Turn Machines
Summary
The Niles-Simmons N20 MC and the Niles-Simmons N40 MC are mill-turn centers on the same SINUMERIK ONE control, and they differ mainly in size. The Niles-Simmons N20 MC is offered in turning lengths from 1,000 to 3,500 mm and weighs 18 to 26 t; the Niles-Simmons N40 MC runs from 2,500 to 9,500 mm and 55 to 85 t.
The Niles-Simmons N40 MC has the longer cross travels, -30 – +1,065 mm in X and -350 – +350 mm in Y against -15 – +660 mm and -150 – +200 mm, and an A15 spindle with torque options of 3,800 | 3,400 Nm and 8,000 | 7,230 Nm. The Niles-Simmons N20 MC turns faster: 0 – 2,500 (3,800) rpm on the A8 spindle and 0 – 1,800 rpm on the A11, against 0 – 1,000 rpm and 0 – 1,750 rpm. Its Z rapid is 40 m/min against 30 m/min.
Specifications Comparison
| Specification | Niles-Simmons N20 MC | Niles-Simmons N40 MC |
|---|---|---|
| X-Axis Travel | -15 – +660 mm | -30 – +1,065 mm ▲ |
| Y-Axis Travel | -150 – +200 mm | -350 – +350 mm ▲ |
| Max Turning Length | 1,000 | 1,500 | 2,000 | 2,500 | 3,000 | 3,500 mm | 2,500 | 3,500 | 5,000 | 6,500 | 8,000 | 9,500 mm |
| Max Spindle Speed | 0 – 2,500 (3,800) rpm (A8); 0 – 1,800 rpm (A11) ▲ | 0 – 1,000 rpm; 0 – 1,750 rpm |
| Spindle Power | 34 | 30.4 kW (A8); 40 | 31 kW (A11); 40% | 100% duty cycle | 80 | 71 kW; 87 | 78 kW; 60% | 100% duty cycle |
| Spindle Torque | 655 | 580 Nm (A8); 1,337 | 1,200 Nm (A11); 40% | 100% duty cycle | 3,800 | 3,400 Nm; 8,000 | 7,230 Nm; 60% | 100% duty cycle |
| Spindle Taper / Nose | A8 | A11 (DIN 55026) | A15 (DIN 55026) |
| Tool Capacity | 48 (60) | 96 (120) pockets | 48 | 72 | 96 | 120 | 144 pockets |
| Rapid Traverse | 25 | 12 | 40 m/min (X, Y, Z) | 30 | 20 | 30 m/min (X, Y, Z) |
| Control | SINUMERIK ONE | SINUMERIK ONE |
| Machine Weight | 18 | 19 | 20 | 22 | 24 | 26 t | 55 | 60 | 65 | 70 | 75 | 85 t |
Advantages
Niles-Simmons N20 MC
- Higher spindle speeds: 0 – 2,500 (3,800) rpm (A8) and 0 – 1,800 rpm (A11) against 0 – 1,000 rpm and 0 – 1,750 rpm
- Faster Z rapid: 40 m/min against 30 m/min
- Lighter installation: 18 to 26 t depending on length, against 55 to 85 t
Niles-Simmons N40 MC
- More X and Y travel: -30 – +1,065 mm and -350 – +350 mm against -15 – +660 mm and -150 – +200 mm
- Turning lengths up to 9,500 mm; the Niles-Simmons N20 MC stops at 3,500 mm
- Main spindle options of 80 | 71 kW and 87 | 78 kW with 3,800 | 3,400 Nm or 8,000 | 7,230 Nm, against at most 40 | 31 kW and 1,337 | 1,200 Nm
- Magazine options up to 144 pockets against 96 (120) pockets
Verdict
Size decides this one. The Niles-Simmons N20 MC suits shafts and chucked parts that fit within 3,500 mm of turning length and benefit from spindle speeds up to 2,500 (3,800) rpm, in a machine of 18 to 26 t. The Niles-Simmons N40 MC is for long, heavy shafts and rolls: turning lengths to 9,500 mm, 8,000 | 7,230 Nm of spindle torque at the top option, and -350 – +350 mm of Y for features on both sides of center.