Kitamura Machinery 5-Axis Machining Centers

Kitamura Kitamura Mytrunnion-5G

$350,000 - $550,000 Updated 2026-03-19

Key Specifications

X Travel

815 mm (32.1")

Y Travel

745 mm (29.3")

Z Travel

500 mm (19.7")

Max Spindle

20,000 min⁻¹

Spindle Taper

NST No. 40 (HSK-A63 Opt.)

Tool Capacity

50 Pcs. – 100 Tools Optional

Overview

The Kitamura Mytrunnion-5G is a mid-size 5-axis simultaneous machining center built around Kitamura's proven trunnion-table architecture. The fixed trunnion design tilts the workpiece rather than the spindle, concentrating mass at the rotary center and maintaining rigidity at extended tilt angles where tilt-head machines lose stiffness. This is a genuine structural advantage for aggressive 5-axis compound-angle cuts in aerospace alloys, medical implant materials, and precision mold components.

The Mytrunnion-5G offers 815 x 745 x 500 mm (32.1 x 29.3 x 19.7 in) X/Y/Z travels around a 630 mm (24.8 in) diameter trunnion table rated for 400 kg (880 lb) workpiece loads. This substantially larger work envelope compared to the Mytrunnion-4G opens the machine to medium-sized aerospace structural parts, mold cores, and multi-part fixtures that exceed the 4G's 400 mm table. The 20,000 RPM 4-step gear-driven spindle with NST No. 40 taper (HSK-A63 optional) delivers both high-speed finishing in aluminum and the low-end torque needed for interrupted cuts in titanium and Inconel.

Kitamura's hand-scraping process applies to the Mytrunnion-5G's linear and rotary axis mating surfaces, producing positioning accuracy of +/-0.001 mm (+/-0.000039 in) per full stroke and repeatability of +/-0.0005 mm (+/-0.00002 in). These numbers place the 5G among the most accurate production 5-axis machines available. The 50-tool ATC (expandable to 100 tools) supports complex multi-operation programs without manual intervention, and rapid traverse rates of 50 m/min on X/Y and 25 m/min on Z keep non-cutting time competitive.

At $350,000-$550,000 new, the Mytrunnion-5G competes directly with the DMG Mori DMU 65 monoBLOCK, Makino D500, and Hermle C 32 U. Kitamura's combination of hand-scraped precision, trunnion rigidity, and gear-driven spindle torque is a strong value proposition for shops where geometric accuracy and cutting force capability matter more than brand recognition or dealer network size.

Full Specifications

Parameter	Value
X-Axis Travel	815 mm (32.1")
Y-Axis Travel	745 mm (29.3")
Z-Axis Travel	500 mm (19.7")
Trunnion Table Diameter	630 mm (24.8 in)
Max Workpiece Weight	400 kg (880 lb)
Max Spindle Speed	20,000 min⁻¹
Spindle Taper	NST No. 40 (HSK-A63 Opt.)
Spindle Drive	4-Step Gear Driven
Tool Capacity	50 Pcs. – 100 Tools Optional
Rapid Traverse Xy	50 m/min (1,969 ipm)
Rapid Traverse Z	25 m/min (984 ipm)
A Axis Range	-120 to +30 degrees
C Axis Range	0 to 360 degrees (continuous)
Positioning Accuracy	±0.001 mm (±0.000039")/full stroke
Repeatability	±0.0005 mm (±0.00002")
Power Supply	50 KVA, 200V AC, 3-phase
CNC Control	Kitamura Arumatik-Mi
Table Size	Ø630 mm (Ø24.8")
Table Load Max	400 kg (880 lbs)
Rapid Traverse X	50 m/min (1,969 ipm)
Rapid Traverse Y	50 m/min (1,969 ipm)
Cnc Control	Arumatik-Mi
Electrical	50 KVA, 200v AC, 3 Phase

Specifications sourced from kitamura-machinery.com — verified 2026-03-28

Strengths & Limitations

Strengths

Trunnion-table design maintains rigidity at all tilt angles, enabling aggressive 5-axis cutting forces without deflection
20,000 RPM gear-driven spindle delivers both high-speed finishing and high torque for interrupted cuts in hard alloys
Hand-scraped mating surfaces produce +/-0.001 mm positioning accuracy -- among the best in production 5-axis machines
630 mm trunnion table with 400 kg capacity handles medium-sized aerospace and mold parts that smaller 5-axis machines cannot
50-tool ATC expandable to 100 tools supports complex multi-operation programs for lights-out capability
+/-0.0005 mm repeatability ensures consistent part quality across long production runs

Limitations

NST No. 40 taper may limit heavy roughing compared to BT50/HSK-A100 machines in the same price range
Kitamura's dealer and service network is smaller than DMG Mori, Mazak, or Okuma in North America
Arumatik-Mi control requires retraining for shops standardized on Fanuc or Heidenhain platforms
Z-axis rapid traverse at 25 m/min is slower than competitors offering 40-60 m/min on all axes

Best For

Aerospace manufacturers machining medium-sized structural components, brackets, and fittings in titanium and aluminum Medical device companies producing orthopedic implants, spinal cages, and surgical instruments requiring 5-axis precision Precision mold and die shops machining complex 3D cavity surfaces where geometric accuracy is critical Job shops seeking a mid-size 5-axis machine with genuine rigidity for compound-angle heavy cutting Defense and space industry suppliers producing complex components where +/-0.001 mm accuracy is a contract requirement

Frequently Asked Questions

01 What is the difference between the Mytrunnion-5G and the Mytrunnion-4G?

The Mytrunnion-5G is substantially larger: 815 x 745 x 500 mm travels vs 350 x 280 x 310 mm on the 4G, with a 630 mm table vs 400 mm. The 5G handles workpieces up to 400 kg while the 4G is limited to 100 kg. Both share the same trunnion architecture and hand-scraped precision, but the 5G targets a completely different part size range.

02 What does a Kitamura Mytrunnion-5G cost?

New Mytrunnion-5G machines typically price between $350,000 and $550,000 depending on spindle configuration, tool magazine capacity, and automation options. This is competitive with the DMG Mori DMU 65 monoBLOCK and Hermle C 32 U while offering Kitamura's hand-scraped accuracy advantage.

03 Can the Mytrunnion-5G machine titanium and Inconel?

Yes, the 4-step gear-driven spindle provides substantial low-end torque for interrupted cuts in titanium and nickel alloys. The trunnion-table rigidity is particularly advantageous for maintaining stable cutting forces at compound angles in these difficult materials. The optional HSK-A63 spindle interface improves rigidity further for heavy roughing.

04 What CAM software works with the Mytrunnion-5G?

The Arumatik-Mi control accepts standard G-code with RTCP compensation for 5-axis simultaneous contouring. CAM software from Mastercam, Hypermill, NX, CATIA, and PowerMill all produce compatible post-processed code. Post processors are available from Kitamura and major CAM vendors.