FANUC Robodrill α-D21MiB Plus

Est. $85,000 - $135,000 Specs verified 2026-10-03 · fanuc.co.jp Updated 2026-10-03

Key Specifications

X Travel

500 mm (19.7 in)

Y Travel

400 mm (15.7 in)

Z Travel

330 mm (13 in)

Max Spindle

10,000 rpm (12,000 rpm tapping / high-acceleration and 24,000 rpm high-speed spindles optional)

Tool Capacity

21 tools

control

FANUC Series 31i-B Plus

How much does the FANUC Robodrill α-D21MiB Plus cost?

Estimated price range

Est.$85,000 - $135,000

Our best estimate for a vertical machining centers (vmc) in this class — not a quote from FANUC. Configuration moves it a long way.

Overview

With 21 tools on 500 x 400 x 330 mm (19.7 x 15.7 x 13 in) of travel, the FANUC Robodrill α-D21MiB Plus is the larger-capacity counterpart of the 14-tool Robodrill α-D14MiB. Travels, spindle choices and the 3-axis FANUC Series 31i-B Plus control are common to the two. Tool count is the whole difference: its 21 tools are 50% more than the 14 of the Robodrill α-D14MiB.

The extra positions change how the machine is run more than how it cuts. Common spot drills, tap drills and taps can stay loaded from job to job with room left for part-specific cutters, or duplicate tools can be kept on board for long runs.

Z travel is 330 mm, the shorter stroke listed at this size. The Robodrill α-D14MiBADV has 400 mm (15.7 in) of Z but 14 tools. The standard spindle here is 10,000 rpm, with 12,000 rpm tapping / high-acceleration and 24,000 rpm high-speed spindles optional.

Full Specifications

Parameter	Value
X-Axis Travel	500 mm (19.7 in)
Y-Axis Travel	400 mm (15.7 in)
Z-Axis Travel	330 mm (13 in)
Tool Capacity	21 tools
CNC Control	FANUC Series 31i-B Plus
Max Spindle Speed	10,000 rpm (12,000 rpm tapping / high-acceleration and 24,000 rpm high-speed spindles optional)
Axes	3-axis (Series 31i-B Plus)

Specifications sourced from fanuc.co.jp — verified 2026-10-03

Strengths & Limitations

Strengths

21 tools, 50% more than the 14 of the Robodrill α-D14MiB on identical travels
500 x 400 mm (19.7 x 15.7 in) of X/Y travel with a 3-axis FANUC Series 31i-B Plus control
Spindle can be specified at 10,000 rpm standard, 12,000 rpm tapping / high-acceleration or 24,000 rpm high-speed

Limitations

Z travel of 330 mm (13 in); the Robodrill α-D14MiBADV has 400 mm (15.7 in)
3-axis control only; the Robodrill α-D21MiB5 has the Series 31i-B5 Plus with the same travels and 21 tools
10,000 rpm as standard, with higher spindle speeds only as options

Best For

Families of drilled and tapped parts that share a standing set of tools Long runs with duplicate tools loaded among the 21 Parts and fixtures that fit under 330 mm (13 in) of Z

Frequently Asked Questions

01 Is the α-D21MiB the same machine as the α-D14MiB with more tools?

On the listed figures, yes. Both have 500 mm (19.7 in) of X, 400 mm (15.7 in) of Y and 330 mm (13 in) of Z, the FANUC Series 31i-B Plus control and the same spindle choices. The Robodrill α-D14MiB holds 14 tools and this model holds 21.

02 Does the α-D21MiB come with a 24,000 rpm spindle?

Not as standard. The standard spindle is 10,000 rpm. The 24,000 rpm high-speed spindle is an option, as is the 12,000 rpm tapping / high-acceleration spindle, so the spindle should be confirmed on any quotation or used machine.

03 Can the α-D21MiB be used for 5-axis work?

It is listed as a 3-axis machine on the FANUC Series 31i-B Plus control. The Robodrill α-D21MiB5 has the same 500 x 400 x 330 mm travels and 21 tools with the Series 31i-B5 Plus control instead.