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Basic performance and operability have been greatly improved and the machine has evolved to become environmentally friendly
The new L20 helps reduce downtime by enabling the use of Citizen’s proprietary LFV (low-frequency vibration cutting) technology for both front and back machining.
In addition, the improved acceleration/deceleration due to the higher output of the back spindle helps to shorten cycle times.Tool shortages have been eliminated by increasing the maximum number of turning tools that can be mounted on the gang tool post to six.
The high-end model L20XIIB5 supports simultaneous 5-axis control and can perform complex machining in conjunction with a CAM system.
As for operation, the large touch panel screen greatly improves ease of use.
From the view point of environmental protection, the L20 has evolved toward sustainable manufacturing with its improved environmental performance that supports our efforts to reduce CO2 emissions, including reducing air consumption through optimal air control and visualisation of environmental information.
| Item | VIII | IX | X | XII | XIIIB5 |
|---|---|---|---|---|---|
| Model | L20E – 3M8 | L20E – 3M9 | L20E – 3M10 | L20E – 3M12 | L20E – 3M12B5 |
| Max. machining diameter | dia. 20 mm, dia. 25 mm [1”] option | ||||
| Max. machining length (GB) | 200 mm per chucking | ||||
| Max. machining length (GBL) | 188 mm per chucking | ||||
| GBL | Max. 50 mm per chucking | ||||
| Max. front drilling diameter | dia. 10 mm | ||||
| Max. front tapping diameter | M8 (cutting tap) | ||||
| Spindle through-hole diameter | dia. 26.4 mm | ||||
| Spindle rotation | Max. 10,000 min⁻¹ | ||||
| Max. chucking diameter of back spindle | dia. 20 mm, dia. 25 mm [1”] option | ||||
| Max. taking-out length of the workpiece | 130 mm | ||||
| Max. workpiece protrusion length of back spindle | 40 mm | ||||
| Back machining max. drilling diameter | dia. 8 mm | ||||
| Back machining max. tapping diameter | M8 (cutting tap) | ||||
| Back spindle speed | Max. 10,000 min⁻¹ | ||||
| Gang tool post rotary tool – Max. drilling diameter | dia. 8 mm | ||||
| Gang tool post rotary tool – Max. tapping diameter | M6 (cutting tap) | ||||
| Gang tool post rotary tool – Spindle rotation | Max. 6,000 min⁻¹ (rated: 4,500 min⁻¹) S3 motor: Max. 9,000 min⁻¹ (rated: 9,000 min⁻¹) | ||||
| Rotary tools on opposite tool post | Max. 6,000 min⁻¹ (rated: 4,500 min⁻¹) | ||||
| Opposite tool post – Max. drilling diameter | – | – | – | dia. 5 mm | dia. 5 mm |
| Opposite tool post – Max. tapping diameter | – | – | – | M4 (cutting tap) | M4 (cutting tap) |
| Opposite tool post – Spindle rotation | – | – | – | Max. 7,500 min⁻¹ (rated: 6,000 min⁻¹) | Max. 7,500 min⁻¹ (rated: 6,000 min⁻¹) |
| Back rotary tool – Max. drilling diameter | option | option | option | dia. 5 mm | dia. 5 mm |
| Back rotary tool – Max. tapping diameter | option | option | option | M4 (cutting tap) | M4 (cutting tap) |
| Back rotary tool – Spindle rotation | option | option | option | Max. 7,500 min⁻¹ | Max. 7,500 min⁻¹ |
| Max. number of mountable tools | 38 | 34 | 45 | 41 | – |
| Turning tools on gang tool post | 6 | ||||
| Rotary tools on gang tool post | 25 | 21 | 25 | 21 | – |
| Front drilling tool | 3 | – | 6 | – | – |
| Back drilling tool | 4 | 8 | – | – | – |
| Tool size | sq. 12 mm (sq. 13 mm, sq. 16 mm) | ||||
| Sleeve | dia. 25 mm (GDS107, 210), dia. 19.05 mm | ||||
| Front spindle collet chuck | FC034-M, FC071-M (ø25 mm [1”]) | ||||
| Back spindle collet chuck | FC034-M-K, FC071-M-K (ø25 mm [1”]) | ||||
| Rotary tool collet chuck | ER11, ER16 | ||||
| Chuck for drill sleeve | ER11, ER16 | ||||
| Guide bushing | WFG206-M, DFG206-M, FG521-M (dia. 25 mm [1”]) | ||||
| Rapid feed rate | X1, Y1, Z1, X2, Z2: 32 m/min Y2 axis: 8 m/min (X only) | ||||
| Motors – front spindle drive | 2.2 / 3.7 / 5.5 kW (continuous/15 min/10%ED) | ||||
| Motors – back spindle drive | 1.5 / 2.2 / 3.7 kW (continuous/40%ED/10%ED) | ||||
| Motor for gang rotary tools | 1.0 kW (2.2 kW with S3 motor) | ||||
| Motor for front rotary tool drive | 0.75 kW | ||||
| Motor for back rotary tool drive | 0.75 kW | ||||
| Coolant motor | 0.4 kW | ||||
| Rated power consumption | 8.3 kVA | ||||
| Average load operation power consumption | 4.5 kVA | ||||
| Total load current | 37 A (41 A with S3 motor) | ||||
| Main breaker capacity | 60 A | ||||
| Power supply voltage | AC 200V ± 10% | ||||
| Pneumatic device – Required pressure | 0.5 MPa | ||||
| Pneumatic device – Flow rate | 52 / 55 / 177 L / min (Power ON / Normal / With air blow) | ||||
| Machine dimensions (W × D × H) | W 2,222 × D 1,625 × H 1,835 mm | ||||
| Machine height | 1,830 mm | ||||
| Machine weight | 2,680 kg | ||||
