FANUC Robodrill α-D21MiBADV Plus
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Tool Capacity
control
How much does the FANUC Robodrill α-D21MiBADV Plus 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 α-D21MiBADV Plus is a 3-axis compact machining center whose Y and Z travels are both 400 mm (15.7 in), on 500 mm (19.7 in) of X, and it carries 21 tools. The control is the FANUC Series 31i-B Plus.
It removes two limits found separately on its siblings. The Robodrill α-D21MiB has the same 21 tools but stops at 330 mm (13 in) of Z. The Robodrill α-D14MiBADV has the 400 mm Z but 14 tools. For 3-axis parts that are both tall and operation-heavy, such as housings drilled and tapped at several depths, neither count has to be traded for the other here.
Height in Z is shared by the fixture, the part and the tool. Long drills and reamers are the usual reason a short-stroke machine runs out of room, because the tool has to clear the part before it can be changed. The spindle that drives them is 10,000 rpm as standard; 12,000 rpm tapping / high-acceleration and 24,000 rpm high-speed spindles are listed as options.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 500 mm (19.7 in) |
| Y-Axis Travel | 400 mm (15.7 in) |
| Z-Axis Travel | 400 mm (15.7 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 with 400 mm (15.7 in) of Z; the Robodrill α-D21MiB has the tools but 330 mm (13 in) of Z
- Equal 400 mm (15.7 in) Y and Z travels on 500 mm (19.7 in) of X
- FANUC Series 31i-B Plus control in a 3-axis configuration
- 24,000 rpm high-speed spindle offered as an option for small-diameter tools
Limitations
- 3-axis only; the Robodrill α-D14MiB5ADV pairs the same travels with the Series 31i-B5 Plus control
- The listed figures include no table size or table load for this model, so get both before designing fixtures
- Speeds above 10,000 rpm depend on an optional spindle
Best For
Frequently Asked Questions
01
Two are one step away. The Robodrill α-D21MiB has the same 21 tools and control with 330 mm (13 in) of Z instead of 400 mm (15.7 in). The Robodrill α-D14MiBADV has the same 500 x 400 x 400 mm travels and control with 14 tools instead of 21.
02
The FANUC Series 31i-B Plus, listed as a 3-axis configuration. The listed figures name the control and give no detail of its functions, so any specific control function a job depends on should be confirmed with FANUC.
03
Z travel is 400 mm (15.7 in), the same as the Y travel. Fixture height, part height and the length of the longest tool all come out of that stroke, along with the clearance needed to change tools above the part. The listed figures do not give the distance from spindle nose to table.
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