Machine Comparison
INDEX C100 vs Tornos DECO 20a
INDEX-Traub vs Tornos · Swiss-Type Lathes
Summary
The INDEX C100 and the Tornos DECO 20a are both listed as Swiss-type lathes, but they serve different jobs. The C100 is a large three-turret production machine taking 42 mm (1.7 in) bar and 400 mm turning lengths. The DECO 20a is a small-part machine with a 20.5 mm (0.807 in) bar capacity and 200 mm (7.87 in) turning length.
The C100 has a 25 / 29 kW main spindle against 5.5 kW (7.4 hp). The DECO 20a runs its main and sub-spindles to 10,000 RPM against 7,000 rpm, and weighs about 3,200 kg against 5,700 kg. Both rapid at 30 m/min. The C100 offers a Siemens S840D sl or FANUC 31i-B control; the DECO uses Tornos TB-DECO / TISIS.
Specifications Comparison
| Specification | INDEX C100 | Tornos DECO 20a |
|---|---|---|
| Max Turning Length | 400 mm ▲ | 200 mm (7.87 in) |
| Bar Capacity | 42 mm (1.7 in) ▲ | 20.5 mm (0.807 in) |
| Max Spindle Speed | 7,000 rpm | 10,000 RPM ▲ |
| Spindle Power | 25 / 29 kW (100%/25% duty) ▲ | 5.5 kW (7.4 hp) |
| Sub-Spindle Speed | 7,000 rpm | 10,000 RPM ▲ |
| Rapid Traverse | 30 m/min | 30 m/min (1,181 ipm) |
| Control | Siemens S840D sl / FANUC Version 31i-B | Tornos TB-DECO / TISIS |
| Machine Weight | 5,700 kg (12,566 lb) | 3,200 kg (7,055 lb) approx. |
Advantages
INDEX C100
- 42 mm (1.7 in) bar capacity against 20.5 mm (0.807 in)
- 400 mm turning length against 200 mm (7.87 in)
- 25 / 29 kW main spindle against 5.5 kW (7.4 hp)
Tornos DECO 20a
- 10,000 RPM main and sub-spindle against 7,000 rpm
- Lighter machine at 3,200 kg (7,055 lb) approx. against 5,700 kg (12,566 lb)
- Sized for small complex parts in titanium, cobalt-chrome, brass and Inconel
Verdict
These machines do different jobs. The INDEX C100 suits high-volume automotive and general parts from 42 mm bar, where three turrets and a 25 / 29 kW spindle finish complex parts in one cycle. The Tornos DECO 20a suits small precision parts under 20.5 mm, such as bone screws, dental implants, watch components, connector pins and aerospace fasteners, where 10,000 RPM spindles matter more than cutting power.