Machine Comparison
Citizen Cincom A20 vs Citizen Cincom R04
Citizen Machinery vs Citizen Machinery · Swiss-Type Lathes
Summary
The Citizen Cincom A20 and Citizen Cincom R04 are both Citizen Swiss-type lathes, but they serve different jobs. The A20 is an entry-level 20 mm machine for general small turned parts. The R04 is a micro-machining lathe for parts up to 4 mm (0.16 in) in diameter, such as watch pivots, micro-medical pins and fiber optic ferrules.
The A20 takes 20 mm (25 option) bar against 4 mm, turns 200 mm per chucking against 40 mm (1.57 in), has 2.2 / 3.7 kW of spindle power against 0.75 / 1.1 kW, and holds 21 tools against 13 Tools. The R04 runs faster for small diameters: 20,000 rpm (Rating: 16,000) on the main spindle against 10,000 rpm, 10,000 rpm on the sub-spindle against 8,000 rpm, and 8,000 rpm live tools against 6,000 rpm.
Specifications Comparison
| Specification | Citizen Cincom A20 | Citizen Cincom R04 |
|---|---|---|
| Max Turning Diameter | 20 mm (25 option) ▲ | 4 mm (0.16 in) |
| Max Turning Length | 200 mm / 1 chucking (188 mm for 25) ▲ | 40 mm (1.57 in) |
| Max Spindle Speed | Max. 10,000 rpm | 20,000 rpm (Rating: 16,000) ▲ |
| Spindle Power | 2.2 / 3.7 kW ▲ | 0.75 / 1.1 kW |
| Sub-Spindle Speed | Max. 8,000 rpm | 10,000 rpm ▲ |
| Live Tool Speed | Max. 6,000 rpm (Rating 4,500 rpm) | 8,000 rpm (Part: 6,000) ▲ |
| Tool Capacity | 21 ▲ | 13 Tools |
| Rapid Traverse | 32 m/min ▲ | 30 m/min (all axes) |
| Center Height | 1,050 mm (41.3 in) | 1,000mm |
| Control | Citizen CNC | Mitsubishi Meldas (Citizen software) |
| Machine Weight | 4,851 lb (2,200 kg) | 950 kg (2,094 lb) |
Advantages
Citizen Cincom A20
- 20 mm (25 option) turning diameter against 4 mm (0.16 in)
- 200 mm turning length per chucking against 40 mm (1.57 in)
- 2.2 / 3.7 kW spindle power against 0.75 / 1.1 kW
- 21 tools against 13 Tools, and 32 m/min rapids against 30 m/min
Citizen Cincom R04
- 20,000 rpm (Rating: 16,000) main spindle against 10,000 rpm
- 10,000 rpm sub-spindle against 8,000 rpm
- 8,000 rpm live tools against 6,000 rpm
- Lighter machine at 950 kg (2,094 lb) against 2,200 kg
Verdict
These machines serve different jobs. Choose the Citizen Cincom R04 for micro parts up to 4 mm, such as watch stems and pinions, micro-cannulas, dental tips and connector micro-contacts, where 20,000 rpm on the main spindle gives the surface speed small diameters need. Choose the Citizen Cincom A20 for pins, contacts and small shafts up to 20 mm (25 option) and 200 mm long.