# FANUC ROBODRILL α-D21MiB5 Plus

Hardware · `ROBODRILL α-D21MiB5 Plus` · verification: source checked

The ROBODRILL α-D21MiB5 Plus is a vertical CNC drilling and milling machine with 500 mm X, 400 mm Y and 330 mm Z travel on a 650 x 400 mm table. Its spindle runs between 10,000 and 24,000 rpm and holds 21 tools in the automatic tool changer. It is run by the FANUC ROBODRILL 31i-B5 Plus controller and is intended for milling and drilling work with multipart clamping.

## Specification

| Property | Value |
|---|---|
| Category | cnc mill |
| Repeatability | 0.004 mm |
| Travel X | 500 mm |
| Travel Y | 400 mm |
| Travel Z | 330 mm |
| Spindle max | 24000 rpm |
| Spindle power | 26 kW |
| Spindle taper | BBT30 |
| Rapid traverse | 54 m/min |
| Tool capacity | 21 |
| Table length | 650 mm |
| Table width | 400 mm |
| Table load | 300 kg |

## Connected

- Manufacturer: [FANUC](https://machineschema.com/manufacturer/fanuc.md)
- Controllers: [FANUC ROBODRILL 31i-B5 Plus](https://machineschema.com/controller/fanuc-robodrill-31i-b5-plus.md)

## Study notes

- Spindle load ratings: 80 Nm / 14.2 kW at 10,000 rpm (1 min); 13.6 Nm / 4 kW continuous; 35 Nm / 26 kW at 24,000 rpm (1 min); 7.5 Nm / 5.5 kW continuous.
- Spindle speed range is 10,000 to 24,000 rpm.
- Spindle holder options stated: 7/24 taper No.30/SK30 DIN 69871A and BBT30.
- Machine mass is given as 2 t, or 2.2 t with DDR-TiB.
- Tool change time (2 kg tool, cut to cut) is 1.6 s.
- Max. tool length 250 mm, max. tool diameter 80 mm, max. tool mass 3 kg.
- Distance from spindle nose to table is 250-580 mm with HC100.
- Maximum programmable cutting feed is 30,000 mm/min.
- Bidirectional positioning accuracy per ISO 230-2:1988 is < 0.006 mm; bidirectional repeatability per ISO 230-2:1997/2006 is < 0.004 mm.
- Air pressure consumption is 160 L/min at 0.35-0.55 MPa.

## Sources

1. [α D21MiB5 Plus](https://www.fanucamerica.com/products/robodrill/a-d21mib5-plus) (accessed 2026-10-26)
2. [robodrill a d21mib5 plus](https://www.fanucamerica.com/uploads/files/data-sheets/robodrill-a-d21mib5-plus.pdf?preview) (accessed 2026-10-26)

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