Makino a81nx

$700,000 - $1,000,000 Updated 2026-03-13

Key Specifications

X Travel

900 mm (35.4 in)

Y Travel

800 mm (31.5 in)

Z Travel

900 mm (35.4 in)

Max Spindle

10,000 RPM (14,000 RPM optional HSK-A63)

Spindle Taper

CAT50 (HSK-A100 opt)

Tool Capacity

60 (80, 136, 187, 299 opt)

Overview

The Makino a81nx is an 800mm-class horizontal machining center designed for heavy-duty production of large prismatic parts in automotive, construction equipment, and general industrial applications. It builds on Makino's proven nx-series platform with cross-roller guides, direct-drive B-axis, and the Professional 6 control, but scales up the work envelope significantly from the a61nx to handle bigger castings, housings, and structural components.

Axis travel runs 900 x 800 x 900 mm (35.4 x 31.5 x 35.4 in) on X/Y/Z, giving substantial room for large transmission cases, pump bodies, and engine blocks. The 800 x 800 mm (31.5 x 31.5 in) pallet accommodates heavy fixtures with a 1,200 kg (2,646 lb) load capacity, making it suitable for cast iron and steel workpieces that would overload smaller HMCs. Dual pallets are standard, enabling continuous production with load-while-cutting capability.

The standard spindle turns at 10,000 RPM through an HSK-A100 taper with 37 kW (49.6 hp) continuous power and 700 Nm of torque, optimized for aggressive roughing in ferrous materials. An optional 14,000 RPM HSK-A63 spindle is available for shops that need higher speeds for aluminum or lighter cuts. The HSK-A100 taper provides the rigidity needed for large-diameter face mills and heavy boring operations that define this machine's core applications.

The direct-drive B-axis table indexes without backlash or mechanical wear, providing consistent accuracy over the machine's lifetime. Cross-roller guides on all linear axes deliver higher rigidity than conventional linear guides, supporting the aggressive cutting parameters this machine class demands. Rapid traverse hits 50 m/min (1,969 ipm) on all linear axes. The 60-tool ATC is standard with expansion options for extended unattended operation.

At approximately 22,000 kg (48,502 lb), the a81nx carries the mass needed for vibration-free heavy cutting. Makino's Thermal Stabilizer package maintains dimensional accuracy across extended production runs. The machine integrates with Makino's MMC2 pallet pool automation for multi-machine cells. Direct competitors include the Mazak HCN-8800, Okuma MB-8000H, and DMG Mori NHX 8000. Pricing reflects the premium positioning of Makino's HMC line.

Full Specifications

Parameter	Value
X-Axis Travel	900 mm (35.4 in)
Y-Axis Travel	800 mm (31.5 in)
Z-Axis Travel	900 mm (35.4 in)
Max Spindle Speed	10,000 RPM (14,000 RPM optional HSK-A63)
Spindle Taper	CAT50 (HSK-A100 opt)
Spindle Motor Power	37 kW (49.6 hp) continuous
Spindle Torque	700 Nm (516 ft-lb)
Tool Capacity	60 (80, 136, 187, 299 opt)
Pallet Size	800 x 800 mm (31.5 x 31.5 in)
Number Of Pallets	2 standard
Max Workpiece Size	Ø 1,050 x 1,200 mm (Ø 41.3 x 47.2 in)
Pallet Load Capacity	1,200 kg (2,646 lb)
B Axis	360°
Rapid Traverse Rate	1,968 in/min (Std)1,417 in/min (High Torque)
Positioning Accuracy	±0.002 mm (±0.00008 in)
Repeatability	±0.001 mm (±0.00004 in)
Machine Weight	~22,000 kg (48,502 lb)
CNC Control	Makino Professional 6 (Pro 6)
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Metric	English
Pallet	24.8" x 24.8"
Spindle Rpm	10,000 (8,000 High Torque opt)
Cutting Feedrate	1,968 in/min (Std), 1,417 in/min (High Torque)
Maximum Workpiece	ø39.4" x 51.2"
Maximum Payload	2,645 lbs (3,307 lbs opt)
Tool To Tool	1.7 sec (12 kg tool)
Chip To Chip	3.7 sec
Maximum Tool Length	27.2"
Maximum Tool Length Hsk	27.2"
Maximum Tool Diameter	14.0"
Maximum Tool Weight	66 lbs (77 lbs opt.)

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

Strengths & Limitations

Strengths

HSK-A100 spindle with 700 Nm torque handles heavy roughing in cast iron and steel with large-diameter cutters that smaller HSK-A63 machines cannot match
1,200 kg pallet load capacity accommodates the heavy fixtures and large castings typical of 800mm-class production work
Cross-roller guides on all linear axes provide significantly higher rigidity than standard linear guides, enabling aggressive cutting parameters without sacrificing accuracy
Direct-drive B-axis eliminates backlash and mechanical wear for consistent indexing accuracy throughout the machine's service life
Makino's Thermal Stabilizer system maintains dimensional accuracy across multi-shift production runs in varying shop temperatures
MMC2 pallet pool integration enables scalable automation from standalone 2-pallet operation to multi-machine lights-out cells
900 mm Z-axis travel provides deep-reach capability for machining tall parts and accessing features inside deep cavities

Limitations

Premium pricing ($700K-$1M) puts the a81nx well above comparably sized HMCs from Mazak and Okuma, requiring high-value production work to justify the investment
22,000 kg machine weight requires reinforced foundations and limits floor plan flexibility once installed
10,000 RPM maximum spindle speed on the standard HSK-A100 spindle is lower than competitors offering 12,000-14,000 RPM as standard
Makino's service network is smaller than Mazak or Okuma in some North American regions, potentially impacting response times for critical breakdowns

Best For

Automotive and powertrain manufacturers machining large transmission cases, engine blocks, and structural castings in high volumes Construction and heavy equipment producers requiring heavy material removal on large cast iron and steel components Energy sector manufacturers machining large valve bodies, pump housings, and turbine components Production environments scaling into MMC2 multi-pallet automation for high-volume, tight-tolerance large-part production Shops that need CAT 50-class rigidity with the precision and thermal stability of Makino's nx-series platform

Frequently Asked Questions

01 What does a Makino a81nx cost?

New Makino a81nx machines typically price between $700,000 and $1,000,000 depending on configuration. A base machine with standard HSK-A100 spindle, 60-tool ATC, and 2-pallet system starts around $700,000. Adding high-pressure coolant, probing, expanded tool magazine, and MMC2 pallet automation pushes toward $900,000-$1,000,000+. Used a81nx machines are relatively scarce on the secondary market due to their production-critical role, but when available, units from 2015-2020 typically trade between $350,000 and $550,000.

02 How does the a81nx compare to the Makino a61nx?

The a81nx steps up from the a61nx in every dimension: 800mm pallets vs 500mm, 1,200 kg pallet load vs 550 kg, HSK-A100 taper vs HSK-A63, and 700 Nm torque vs 303 Nm. The a61nx is the better choice for medium-sized parts where HSK-A63 tooling and higher spindle speeds are advantageous. The a81nx targets applications where workpiece size, fixture weight, and heavy cutting forces demand the larger platform.

03 What materials can the a81nx handle?

The a81nx's HSK-A100 spindle with 700 Nm torque is optimized for heavy cutting in cast iron (gray, ductile, CGI), carbon and alloy steels, and stainless steels. The optional 14,000 RPM HSK-A63 spindle enables productive aluminum machining when needed. The machine handles mixed-material production but is most cost-effective on ferrous materials where its torque advantage over smaller machines translates directly to shorter cycle times.

04 What automation options are available for the a81nx?

The a81nx comes standard with a 2-pallet APC for basic load-while-cutting operation. It integrates with Makino's MMC2 (Makino Machining Complex 2) linear pallet pool system for multi-pallet configurations ranging from 6 to 40+ pallets connecting one or more machines. The MAS-A5 cell controller software manages scheduling, tool life, and production reporting. The expanded tool magazine options support extended unattended runs.

05 How does the a81nx compare to the Okuma MB-8000H?

Both are 800mm-class production HMCs but with different priorities. The Okuma MB-8000H offers its THINC-OSP control with open architecture and strong conversational programming. The Makino a81nx counters with cross-roller guides, direct-drive B-axis, and Makino's spindle quality advantage. The Okuma typically prices 15-25% lower. Choose the Makino for surface finish quality and precision; choose the Okuma for versatility and lower acquisition cost.