Machine Comparison
Fanuc Robodrill α-D21LiB5 vs Fanuc Robodrill D21MiB5 Advance
Fanuc vs Fanuc · Vertical Machining Centers
Summary
The Fanuc Robodrill α-D21LiB5 and the Fanuc Robodrill D21MiB5 Advance are the long-bed and standard versions of the same machine. They share 400 mm of Y and 330 mm of Z travel, a 300 kg (660 lb) table rating, a 10,000 RPM spindle (24,000 RPM optional) with 79.7 Nm (58.8 ft-lbf) of torque, a 21-tool turret, 0.7 sec tool changes, 54 m/min rapids and a Fanuc 31i-B5 control.
The difference is length. The α-D21LiB5 has 700 mm of X travel against 500 mm and an 850 x 410 mm table against 650 x 400 mm, which leaves room for a rotary table beside three-axis fixtures. The D21MiB5 Advance is lighter at 2,000 kg against 2,300 kg.
Specifications Comparison
| Specification | Fanuc Robodrill α-D21LiB5 | Fanuc Robodrill D21MiB5 Advance |
|---|---|---|
| X-Axis Travel | 700 mm (27.5 in) ▲ | 500 mm (19.7 in) |
| Y-Axis Travel | 400 mm (15.7 in) | 400 mm (15.7 in) |
| Z-Axis Travel | 330 mm (13 in) | 330 mm (13 in) |
| Table Size | 850 x 410 mm (33.5 x 16.1 in) | 650 x 400 mm (25.6 x 15.7 in) |
| Max Table / Workpiece Load | 300 kg (660 lb) | 300 kg (660 lb) |
| Max Spindle Speed | 10,000 RPM (24,000 RPM optional) | 10,000 RPM (24,000 RPM optional) |
| Spindle Power | 14.2 kW (19 hp) peak @ 10K RPM; 26.0 kW (35 hp) peak @ 24K RPM | 14.2 kW (19 hp) peak @ 10K RPM; 26.0 kW (35 hp) peak @ 24K RPM |
| Spindle Torque | 79.7 Nm (58.8 ft-lbf) @ 1,700 RPM (10K spindle); 35 Nm @ 24K spindle | 79.7 Nm (58.8 ft-lbf) @ 1,700 RPM (10K spindle) |
| Spindle Taper / Nose | BT30 / BBT30 | BT30 / BBT30 |
| Tool Capacity | 21-position turret | 21 turret |
| Tool Change (tool-to-tool) | 0.7 sec (ADV); 0.9 sec (Standard) | 0.7 sec |
| Chip-to-Chip Time | 1.3 sec (ADV); 1.5 sec (Standard) | 1.3 sec |
| Rapid Traverse | 54 m/min (2,125 ipm) | 54 m/min (2,125 ipm) |
| Positioning Accuracy | ±0.003 mm (±0.00012 in) | ±0.003 mm (±0.00012 in) |
| Repeatability | ±0.002 mm (±0.00008 in) | ±0.002 mm (±0.00008 in) |
| Control | Fanuc 31i-B5 | Fanuc 31i-B5 |
| Machine Weight | 2,300 kg (5,070 lb) | 2,000 kg (4,400 lb) |
Advantages
Fanuc Robodrill α-D21LiB5
- 700 mm (27.5 in) of X travel against 500 mm (19.7 in)
- 850 x 410 mm (33.5 x 16.1 in) table against 650 x 400 mm (25.6 x 15.7 in)
- Room for a DDR rotary table at one end with three-axis fixtures beside it
Fanuc Robodrill D21MiB5 Advance
- Lighter at 2,000 kg (4,400 lb) against 2,300 kg (5,070 lb)
- Shorter 650 x 400 mm table suited to single-fixture high-volume cells
Verdict
The spindle, turret, speeds and accuracy are the same, so choose by table length. The α-D21LiB5 suits long parts and shops that want a rotary table and fixed fixtures on one 850 mm table, adding five-sided work to the cell. The D21MiB5 Advance suits high-volume aluminum and light-alloy parts that fit 500 mm of X travel, in a 2,000 kg machine.