FANUC RoboDrill a-D21MiB
Key Specifications
X Travel
Y Travel
Z Travel
Spindle Taper
Table Size
Rapid Traverse
How much does the FANUC RoboDrill a-D21MiB cost?
Estimated price range
Our best estimate for a vertical machining centers (vmc) in this class — not a quote from FANUC. Configuration moves it a long way.
Overview
The FANUC RoboDrill a-D21MiB is a BT30 vertical machining center with travels of 500 mm (19.7 in) in X, 400 mm (15.7 in) in Y and 330 mm (13.0 in) in Z. Its 650 x 400 mm (25.6 x 15.7 in) table is rated for 200 kg (441 lb), and tools sit in a 21-position turret.
Twenty-one positions let a shop keep a standing set of drills, taps and spot tools loaded and still have room for the cutters a particular job needs, which cuts setup time when several part numbers share the machine. The listed tool change is 0.8 sec tool-to-tool and 1.4 sec chip-to-chip.
Y travel equals the 400 mm depth of the table, so the full depth can be reached, while the table is longer than the 500 mm of X. At 200 kg (441 lb) the load rating leaves room for a fixture plate or vises as well as the part, but add the weights up before fitting a rotary unit. The spindle gives 11 kW (15 hp) continuous at up to 10,000 RPM, with 24,000 RPM listed as an option.
For installation, the listed footprint is 2,050 x 1,750 mm (80.7 x 68.9 in) and the weight 3,800 kg (8,378 lb). The control row reads FANUC 31i-B. The Robodrill α-D21MiB Plus is listed with the same travels and 21 tools but the FANUC Series 31i-B Plus, so check which control a job's programs were written for.
Full Specifications
| Parameter | Value |
|---|---|
| Max Table Load | 200 kg (441 lb) |
| Spindle Motor Power | 11 kW (15 hp) continuous |
| Spindle Taper | BT30 |
| Tool Magazine | 21-position turret |
| CNC Control | FANUC 31i-B |
| X-Axis Travel | 500 mm (19.7 in) |
| Y-Axis Travel | 400 mm (15.7 in) |
| Z-Axis Travel | 330 mm (13.0 in) |
| Table Size | 650 x 400 mm (25.6 x 15.7 in) |
| Spindle Speed | 10,000 RPM (24,000 RPM optional) |
| Tool Change Time | 0.8 sec (tool-to-tool), 1.4 sec (chip-to-chip) |
| Rapid Traverse Rate | 54 m/min (2,125 ipm) |
| Positioning Accuracy | ±0.004 mm (±0.00016 in) |
| Repeatability | ±0.002 mm (±0.00008 in) |
| Machine Weight | 3,800 kg (8,378 lb) |
| Floor Space Required | 2,050 x 1,750 mm (80.7 x 68.9 in) |
Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.
Strengths & Limitations
Strengths
- 21-position turret holds a standing tool set plus job-specific cutters
- 650 x 400 mm (25.6 x 15.7 in) table rated for 200 kg (441 lb)
- 11 kW (15 hp) continuous spindle power on a BT30 taper
- Footprint of 2,050 x 1,750 mm (80.7 x 68.9 in) for 500 mm (19.7 in) of X travel
- Rapids of 54 m/min (2,125 ipm) with repeatability of ±0.002 mm (±0.00008 in)
Limitations
- Table load is 200 kg (441 lb), below the 300 kg (660 lb) listed for the Robodrill α-D14MiBADV Plus
- Z travel is 330 mm (13.0 in), against 400 mm (15.7 in) on the Robodrill α-D14MiBADV Plus
- 24,000 RPM is optional; the standard spindle speed is 10,000 RPM
- The BT30 taper limits tool diameter and overhang for heavier milling
Best For
Frequently Asked Questions
01
The listed tool magazine is a 21-position turret, with a tool change of 0.8 sec tool-to-tool and 1.4 sec chip-to-chip. For comparison, the Robodrill α-D14MiB Plus is listed with 14 tools on the same 500 mm (19.7 in) and 400 mm (15.7 in) X and Y travels.
02
200 kg (441 lb) on a 650 x 400 mm (25.6 x 15.7 in) table, counting the fixture, any rotary unit and the part. Travels are 500 mm (19.7 in), 400 mm (15.7 in) and 330 mm (13.0 in), so parts must also fit inside that envelope with the tool.
03
The listed footprint is 2,050 x 1,750 mm (80.7 x 68.9 in) and the machine weighs 3,800 kg (8,378 lb). Allow extra room around that for door opening, chip handling and maintenance access, none of which the table states.
04
The control row reads FANUC 31i-B. The Robodrill α-D21MiB Plus is listed with the FANUC Series 31i-B Plus instead, so confirm the control on the nameplate when comparing the two models or moving programs between them.
Videos
Methods Machine Tools, Inc
3E Rapid Prototyping Limited
CNC Channels
Community Discussions
Troubleshooting and problem-solving
Links to community discussions. Summaries are editorial — visit the original thread for full context.
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