Fanuc Robodrill D21MiB5 Advance

$80,000 - $130,000 Updated 2026-03-11

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 (24,000 RPM optional)

Spindle Taper

BT30 / BBT30

Tool Capacity

21 turret

Overview

The Fanuc Robodrill D21MiB5 Advance isn't technically a VMC in the traditional sense. It's a high-speed drill-tap center that's been punching above its weight class for decades. With nearly half a million Robodrills installed worldwide, Fanuc's compact machining platform has earned its reputation in production environments where cycle time is money and uptime isn't negotiable.

The D21MiB5 is the medium-bed variant, offering 500 x 400 x 330 mm (19.7 x 15.7 x 13 in) of travel. That's modest compared to a Haas VF-2, but this machine wasn't designed for big parts. It was designed to make small-to-medium parts absurdly fast. The standard 10,000 RPM BT30 spindle delivers 14.2 kW (19 hp) peak power with 79.7 Nm of torque at low speed, but most shops opt for the 24,000 RPM high-speed spindle that pushes 26.0 kW (35 hp) peak. That combination of speed and the BT30 taper makes it a weapon for aluminum, brass, and light alloy work.

The 21-tool turret is where the Robodrill really separates from the pack. Tool-to-tool changes happen in 0.7 seconds, and chip-to-chip time is 1.3 seconds. That's not a typo. Where a typical VMC loses 4-6 seconds per tool change, the Robodrill's servo-driven turret barely pauses. Over a shift running 200+ tool changes, that adds up to 15-20 minutes of saved cycle time. Rapid traverse hits 54 m/min (2,125 ipm) across all axes, so the machine doesn't waste time between features either.

Fanuc runs everything through their own 31i-B5 control, the same platform that powers their industrial robots and CNC systems worldwide. It's not the friendliest control to learn coming from a Haas NGC or Mazak SmoothG, but it's rock solid and offers features like high-speed look-ahead, AI contour control, and nano interpolation for surface finish work. The Robodrill also integrates seamlessly with Fanuc robots for automated load/unload cells, which is how many production shops run them.

New pricing typically falls between $80,000 and $130,000 depending on spindle speed, options, and automation packages. Used Robodrills from 2015-2020 sell for $40,000-$70,000 and hold their value well. Methods Machine Tools is the primary North American distributor, with a strong service network. The Robodrill competes directly with the Brother Speedio and Haas DT-2, and it's the go-to choice for shops that need maximum throughput in a compact footprint. Specs sourced from Fanuc published data and Methods Machine Tools documentation.

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)
Max Spindle Speed	10,000 RPM (24,000 RPM optional)
Spindle Taper	BT30 / BBT30
Spindle Motor Power	14.2 kW (19 hp) peak @ 10K RPM; 26.0 kW (35 hp) peak @ 24K RPM
Spindle Torque	79.7 Nm (58.8 ft-lbf) @ 1,700 RPM (10K spindle)
Tool Capacity	21 turret
Max Tool Length	250 mm (9.8 in)
Max Tool Diameter	80 mm (3.1 in)
Max Tool Weight	3 kg (6.6 lb)
Tool To Tool Time	0.7 sec
Chip To Chip Time	1.3 sec
Table Size	650 x 400 mm (25.6 x 15.7 in)
Max Table Load	300 kg (660 lb)
Spindle Nose To Table	250-580 mm (9.8-22.8 in)
Rapid Traverse Rate	54 m/min (2,125 ipm)
Max Cutting Feedrate	30,000 mm/min (1,181 ipm)
Positioning Accuracy	±0.003 mm (±0.00012 in)
Repeatability	±0.002 mm (±0.00008 in)
Machine Weight	2,000 kg (4,400 lb)
CNC Control	Fanuc 31i-B5
Number Of Tools	21

Specifications sourced from emastercam.com — verified 2026-03-28

Strengths & Limitations

Strengths

Tool-to-tool change in 0.7 seconds and chip-to-chip in 1.3 seconds make it one of the fastest tool changers in the industry, saving 15-20 minutes per shift versus typical VMCs
54 m/min rapids across all axes mean virtually zero wasted time between features, critical for high-mix production with frequent positioning moves
24,000 RPM high-speed spindle option with 26 kW peak power turns it into an aluminum-eating machine that rivals dedicated high-speed centers costing twice as much
Fanuc 31i-B5 control is the same platform running millions of Fanuc robots and CNCs worldwide, offering proven reliability and seamless robot integration for automated cells
Nearly 500,000 Robodrills installed globally means parts availability, service knowledge, and used market liquidity are exceptional
Compact footprint fits in tight production cells and pairs naturally with Fanuc LR Mate robots for lights-out automation

Limitations

BT30 taper limits rigidity for heavy cuts in steel and hardened materials; this is a speed machine, not a hogging machine
Fanuc 31i control has a steeper learning curve than Haas NGC or Mazak SmoothG, and shops switching from those platforms need training time
13-inch Z-axis travel on the standard model restricts tall part work; the extended Z option adds cost
3 kg max tool weight and 80 mm max tool diameter rule out large face mills and heavy boring bars common on 40-taper machines
New pricing starts around $80K, making it significantly more expensive than the Haas DT-2 at roughly $50K for comparable travel

Best For

High-volume production of small aluminum and light alloy parts where cycle time drives profitability Automotive and electronics component manufacturing requiring sub-2-second tool changes across hundreds of parts per shift Automated production cells with Fanuc robot integration for unattended machining operations Medical device and implant shops running tight-tolerance work in aluminum, titanium, and brass at high spindle speeds Drill-and-tap operations on castings and forgings where the 21-tool turret and rapid positioning eliminate bottlenecks Shops upgrading from manual or slower VMCs that need a production-grade platform without the footprint of a horizontal

Frequently Asked Questions

01 What's the difference between the Robodrill Standard and Advanced versions?

The Advanced (ADV) version gets faster tool changes at 0.7 seconds tool-to-tool versus 0.9 on the Standard. It also includes high-speed look-ahead, AI contour control, and nano interpolation as standard features. The ADV is the version most production shops buy because those fractions of a second per tool change compound over thousands of parts.

02 How does the Robodrill compare to the Haas DT-2?

The Robodrill D21MiB5 ADV changes tools in 0.7 seconds versus 2.2 on the DT-2, and rapids at 2,125 ipm versus 1,200 on the DT-2. The Robodrill also has a 21-tool turret versus 20+1 on the DT-2. The Haas wins on price (roughly $50K vs $80K+), on Z-travel (20 inches vs 13), and on control ease-of-use. If cycle time is king, the Robodrill wins. If budget and versatility matter more, the DT-2 is hard to beat.

03 Can the Robodrill cut steel?

Yes, but with limitations. The BT30 taper doesn't have the rigidity of a 40-taper machine for aggressive steel roughing. Shops cut mild steel, 4140, and even stainless on Robodrills regularly, but they use lighter cuts at higher speeds. For heavy steel removal, a 40-taper VMC like the Haas VF-2 or Okuma GENOS M560-V is a better fit. The Robodrill shines in aluminum, brass, and light alloy work.

04 Who sells and services Robodrills in North America?

Methods Machine Tools is the primary North American distributor for Fanuc Robodrills. They offer sales, service, applications engineering, and automation integration through locations across the US. Fanuc also has direct service capabilities through their network. Used Robodrills are widely available through machinery dealers, and the large installed base means independent service providers are common too.

05 What spindle speed should I choose?

The 10,000 RPM spindle offers more torque at lower speeds and is better for mixed-material work including steel and larger diameter tools. The 24,000 RPM spindle is the choice for aluminum-dominant shops where surface speed matters. Most production shops running aluminum parts go with the 24K spindle. If you're doing a mix of materials and aren't sure, the 10K is more versatile. You can't change spindles later without significant cost.

06 How reliable are Robodrills?

Extremely reliable. Fanuc builds the spindle, control, servo motors, and amplifiers in-house, which eliminates finger-pointing between component suppliers. Forum users regularly report 10+ years of daily production with minimal downtime. The main wear items are spindle bearings and turret mechanisms, both well-documented with straightforward replacement procedures. The Robodrill's reliability is one of its strongest selling points.