FANUC RoboDrill a-D21MiB5 5-Axis
Key Specifications
X Travel
Y Travel
Z Travel
Spindle Taper
Rapid Traverse
Spindle Power
How much does the FANUC RoboDrill a-D21MiB5 5-Axis cost?
Estimated price range
Our best estimate for a 5-axis machining center in this class — not a quote from FANUC. Configuration moves it a long way.
Overview
The FANUC RoboDrill a-D21MiB5 5-Axis is a BT30 / BBT30 machining center with two rotary axes on the FANUC 31i-B5 control. The A axis tilts from -120 to +30 degrees at 100 RPM, and the C axis has 360 degrees of continuous rotation at 150 RPM. Linear travels are 500 mm (19.7 in) in X, 400 mm (15.7 in) in Y and 330 mm (13.0 in) in Z.
The part envelope is set by the rotary unit. With the DDR the listed maximum workpiece is 300 mm (11.8 in) in diameter and 200 mm (7.9 in) high, well inside the linear travels. The table gives no rotary load, so get that figure before designing a fixture.
Spindle choice is the main decision. The standard spindle is rated 11 kW (15 hp) and runs to 10,000 RPM. The high-speed spindle is rated 26 kW (35 hp), and 24,000 RPM is listed as the optional top speed. On a 30-taper spindle that extra speed serves small drills, small end mills and finishing passes in aluminium. It does not turn the machine into a heavy rougher, because the taper still sets the limit on tool size and overhang.
Rotary speeds of 100 and 150 RPM mean indexing between faces does not hold up a short cycle, and the 21-position turret changes in 0.7 sec tool-to-tool, 1.3 sec chip-to-chip. Rapids are 54 m/min (2,125 ipm). The machine weighs 4,200 kg (9,259 lb).
Full Specifications
| Parameter | Value |
|---|---|
| A Axis Speed | 100 RPM |
| Spindle Speed | 10,000 RPM (24,000 RPM optional) |
| Spindle Motor Power | 11 kW (15 hp) standard / 26 kW (35 hp) high-speed |
| Spindle Taper | BT30 / BBT30 |
| Rapid Traverse Rate | 54 m/min (2,125 ipm) |
| CNC Control | FANUC 31i-B5 |
| X-Axis Travel | 500 mm (19.7 in) |
| Y-Axis Travel | 400 mm (15.7 in) |
| Z-Axis Travel | 330 mm (13.0 in) |
| A Axis Range | -120 to +30 degrees |
| C Axis Range | 360 degrees continuous |
| C Axis Speed | 150 RPM |
| Tool Magazine | 21-position turret |
| Tool Change Time | 0.7 sec (tool-to-tool), 1.3 sec (chip-to-chip) |
| Max Workpiece Diameter Ddr | 300 mm (11.8 in) |
| Max Workpiece Height Ddr | 200 mm (7.9 in) |
| Positioning Accuracy | ±0.003 mm (±0.00012 in) |
| Repeatability | ±0.002 mm (±0.00008 in) |
| Machine Weight | 4,200 kg (9,259 lb) |
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
- A axis from -120 to +30 degrees at 100 RPM and a continuous 360 degree C axis at 150 RPM
- Two spindle ratings are listed: 11 kW (15 hp) standard and 26 kW (35 hp) for the high-speed spindle
- 21-position turret with 0.7 sec tool-to-tool and 1.3 sec chip-to-chip changes
- Positioning accuracy of ±0.003 mm (±0.00012 in) and repeatability of ±0.002 mm (±0.00008 in)
Limitations
- With the DDR, workpieces are limited to 300 mm (11.8 in) in diameter and 200 mm (7.9 in) in height
- 24,000 RPM is optional; the standard spindle speed is 10,000 RPM
- A axis tilt stops at +30 degrees on one side
- The BT30 / BBT30 taper restricts tool diameter and overhang whichever spindle is chosen
Best For
Frequently Asked Questions
01
The standard spindle is listed at 11 kW (15 hp) with a top speed of 10,000 RPM. The high-speed spindle is listed at 26 kW (35 hp), with 24,000 RPM as the optional maximum. Both take BT30 / BBT30 tooling, so the choice is about speed and power, not about tool size.
02
The A axis range is -120 to +30 degrees at 100 RPM. The C axis is 360 degrees continuous at 150 RPM. The table gives no load for the rotary unit, so check that against the fixture and part you intend to run.
03
The listed maximum workpiece with the DDR is 300 mm (11.8 in) in diameter and 200 mm (7.9 in) in height. Linear travels of 500 mm (19.7 in), 400 mm (15.7 in) and 330 mm (13.0 in) are larger than that, so the rotary unit is what limits part size.
04
The RoboDrill a-D14MiB5 is listed with the same travels, the same FANUC 31i-B5 control and the same 54 m/min (2,125 ipm) rapid rate, a 650 x 400 mm (25.6 x 15.7 in) table carrying 200 kg (441 lb), and a weight of 3,900 kg (8,598 lb). This model is listed at 4,200 kg (9,259 lb) with a 21-position turret.
Videos
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Community Discussions
Troubleshooting and problem-solving
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