FANUC Robodrill α-D21SiB5ADV Plus
Image: fanuc.co.jp, FANUC
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Tool Capacity
Table Size
How much does the FANUC Robodrill α-D21SiB5ADV 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
Three rows set the FANUC Robodrill α-D21SiB5ADV Plus apart from the base machine of its size: 21 tools, 400 mm (15.7 in) of Z travel and the Series 31i-B5 Plus control, which FANUC lists as 5-axis capable. The Robodrill α-D14SiB, at the other end, has 14 tools, 330 mm (13 in) of Z and the 3-axis Series 31i-B Plus.
What does not change is the size of the work. X travel is 300 mm (11.8 in), Y is listed as 300 mm (11.8 in) + 100 mm extension, the table is 500 x 300 mm (19.7 x 11.8 in) and it carries 100 kg (220 lb). So this is still a small-part machine. The upgrades give the ability to do more to each part in one clamping, not the ability to hold a bigger part.
That suits a cell built around a tilting rotary table. The taller Z gives the rotary unit, fixture and tool room to stack. The larger changer carries the tools for every face. The control handles the extra axes. The weight limit is the figure that still needs care: a rotary unit's own weight comes out of the 100 kg (220 lb) before a fixture goes on it. Spindle choice is the last decision, between the 10,000 rpm standard spindle and the optional 12,000 rpm tapping / high-acceleration and 24,000 rpm high-speed versions.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 300 mm (11.8 in) |
| Y-Axis Travel | 300 mm (11.8 in) + 100 mm extension |
| Z-Axis Travel | 400 mm (15.7 in) |
| Table Size | 500 x 300 mm (19.7 x 11.8 in) |
| Max Table Load | 100 kg (220 lb) |
| Tool Capacity | 21 tools |
| CNC Control | FANUC Series 31i-B5 Plus |
| Max Spindle Speed | 10,000 rpm (12,000 rpm tapping / high-acceleration and 24,000 rpm high-speed spindles optional) |
| Axes | 5-axis capable control (Series 31i-B5 Plus) |
Specifications sourced from fanuc.co.jp — verified 2026-10-03
Strengths & Limitations
Strengths
- 21 tools, 400 mm (15.7 in) of Z and a 5-axis capable control in one compact machine
- Z travel is 400 mm (15.7 in), against 330 mm (13 in) on the Robodrill α-D21SiB
- 24,000 rpm high-speed spindle available as an option
Limitations
- Table load remains 100 kg (220 lb), the same as the Robodrill α-D14SiB
- X travel of 300 mm (11.8 in) restricts part length
- FANUC's table lists no rotary axes for this model, only the 5-axis capable control
Best For
Frequently Asked Questions
01
More tools, more Z and a different control. The Robodrill α-D21SiB5ADV has 21 tools, 400 mm (15.7 in) of Z travel and the 5-axis capable Series 31i-B5 Plus. The Robodrill α-D14SiB has 14 tools, 330 mm (13 in) of Z and the 3-axis Series 31i-B Plus. X travel, table size and table load are listed the same.
02
No. Table load is 100 kg (220 lb), the same figure FANUC lists for the shorter-Z models. The 400 mm (15.7 in) of Z adds height for fixtures, rotary units and long tools, not weight capacity.
03
The Robodrill α-D14SiB5ADV matches it on Z travel at 400 mm (15.7 in), on the Series 31i-B5 Plus control and on the 100 kg (220 lb) table load, and carries 14 tools. This model carries 21 tools, which is the only listed difference between the two.
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