Yamazaki Mazak Mill-Turn / Multi-Tasking Machines

Mazak INTEGREX i-500ST

$600,000 - $900,000 Updated 2026-03-17

Key Specifications

X Travel

845 mm (33.27 in)

Y Travel

430 mm (16.93 in)

max turning diameter

700 mm (27.56 in)

max part length

1,575 mm / 2,595 mm / 3,075 mm (three bed lengths)

main spindle speed

2,000-4,000 RPM (varies by bore)

main spindle power

37 kW (50 hp)

Overview

The Mazak INTEGREX i-500ST is the full-capability variant of the i-500 platform, combining a second turning spindle and a lower turning turret with the i-500's large-format 5-axis mill-turn capability. The ST designation marks this as the most capable machine in the i-500 lineup — turning, milling, and drilling on both ends of large workpieces simultaneously, with capacities far exceeding anything in the i-400 class.

The main turning spindle handles workpieces up to 700 mm (27.56 in) in diameter on a 10-inch chuck, with multiple spindle bore configurations available for different bar stock sizes. Main spindle speeds range from 2,000 to 4,000 RPM depending on bore specification. The sub-spindle extends the machine's done-in-one capability to very large parts — automatic transfer and synchronous backworking on the second end without operator intervention. The lower turning turret enables simultaneous cuts with the upper milling head, attacking the workpiece with two tools at once.

The upper B-axis milling spindle provides 240 degrees of tilt (−30° to +210°) with 0.0001-degree resolution through a roller gear cam drive. Milling spindle options include 12,000 RPM standard, 12,000 RPM high-output, 20,000 RPM high-speed, and a No. 50 taper at 10,000 RPM for maximum rigidity on heavy steel and titanium cuts. Y-axis travel extends 430 mm (16.93 in) — 72% more than the i-400 — enabling off-center milling on the large workpieces this machine is designed for.

Machining lengths extend up to 3,075 mm (121.02 in) for shaft-type components, making the i-500ST one of the few multi-tasking machines capable of completing very long shafts from a single clamping. ATC capacity starts at 36 tools in Capto C6 or HSK-A63, expandable to 72 or 110. MAZATROL SmoothAi CNC runs the show. Machine weight exceeds 25,000 kg. New machines in this configuration run $600,000-$900,000. Competitors include the DMG Mori CTX gamma 2000 TC and Okuma Multus U5000.

Full Specifications

Parameter	Value
Max Turning Diameter	700 mm (27.56 in)
Max Part Length	1,575 mm / 2,595 mm / 3,075 mm (three bed lengths)
Main Spindle Speed	2,000-4,000 RPM (varies by bore)
Main Spindle Power	37 kW (50 hp)
Sub Spindle Speed	4,000 RPM
Sub Spindle Power	22 kW (30 hp)
Milling Spindle Speed	12,000 RPM std / 20,000 RPM HS / 10,000 RPM No. 50
Milling Spindle Power	22 kW (30 hp)
Milling Spindle Taper	HSK-A63 or No. 50
B Axis Range	240° (-30° to +210°)
B Axis Resolution	0.0001°
Y-Axis Travel	430 mm (16.93 in)
X-Axis Travel	845 mm (33.27 in)
Number Of Axes	9 (with lower turret and sub-spindle)
Chuck Size Main	10 in
Atc Tool Capacity	36 tools (72 or 110 optional)
Rapid Traverse Xz	50 m/min (1,969 ipm)
Machine Weight	25,000+ kg (55,116+ lb)
CNC Control	MAZATROL SmoothAi CNC

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

Strengths & Limitations

Strengths

700 mm turning diameter and up to 3,075 mm machining length cover the largest shafts, flanges, and structural components in aerospace and energy sectors
430 mm Y-axis travel enables complex off-center milling on very large workpieces that exceed the reach of i-400 class machines
Sub-spindle enables automatic part transfer on large workpieces — a capability most competitors can't offer at this size class
Simultaneous lower turret and upper milling head operation cuts total cycle time by 30-50% on complex large-format parts
Four milling spindle options (12K std, 12K HO, 20K HS, 10K No. 50) adapt to different material mixes without changing the machine
Multiple bed lengths (up to 121 inches) on the same machine platform handle shaft lengths that compete with dedicated large-bore lathes

Limitations

$600K-$900K investment requires a consistent pipeline of large, high-value parts to justify the capital cost
25,000+ kg machine weight demands engineered foundations, specialized rigging, and careful facility planning before installation
Lower main spindle speeds (2,000-4,000 RPM) limit productivity on small-diameter turning and high-speed non-ferrous work
9-axis programming for simultaneous multi-tasking on large, expensive parts requires expert CAM programmers and carefully verified post processors
Lead times of 9-18 months for new machines in custom configurations are common

Best For

Aerospace manufacturers machining large landing gear components, engine shafts, and structural members requiring simultaneous 5-axis milling and turning in single setup Power generation companies producing large turbine shafts, generator components, and valve bodies up to 10 feet long Oil and gas equipment manufacturers with very large-diameter workpieces needing complete machining on a single platform Defense contractors producing large ordnance, propulsion components, and naval hardware requiring complex multi-axis machining Heavy industrial manufacturers running large-format hydraulic components, gearbox shafts, and drive systems in specialty alloys

Frequently Asked Questions

01 What is the difference between the INTEGREX i-500, i-500S, and i-500ST?

The base i-500 has a single main turning spindle and the upper B-axis milling head. The i-500S adds a second (sub) spindle for automatic part transfer and backworking on the second end. The i-500ST adds both the sub-spindle and a lower turning turret. The lower turret enables simultaneous cutting with the upper milling head, which is the biggest differentiator — two tools cutting at the same time. The ST configuration costs $100,000-$200,000 more than the base i-500 but delivers significantly higher throughput on complex parts.

02 How does the i-500ST differ from the i-400ST?

The i-500ST steps up from the i-400ST in every capacity dimension: larger turning diameter (700 mm vs 658 mm), more Y-axis travel (430 mm vs 250 mm), longer machining lengths (up to 121 in vs 60 in), and a heavier, more powerful sub-spindle. The i-500ST also adds a No. 50 taper milling spindle option unavailable on the i-400ST. The tradeoff is higher cost and more floor space. Choose the i-500ST when parts exceed the i-400ST's capacity in any dimension.

03 Which bed length should I choose on the i-500ST?

The i-500ST is available in three bed lengths: 1,575 mm (61.97 in), 2,595 mm (102.13 in), and 3,075 mm (121.02 in) maximum machining length. Choose based on your longest planned workpiece plus clearance. Most aerospace shaft and energy sector shops choose the middle or longest bed. Longer beds add cost and floor space requirements. If you're unsure, the 2,595 mm configuration handles most practical applications while the 3,075 mm bed is reserved for the most extreme long-shaft applications.

04 What milling spindle should I choose for the i-500ST?

The 12,000 RPM high-output spindle is the most common choice for mixed-material shops running steel, stainless, titanium, and aluminum. The 20,000 RPM high-speed spindle excels in aluminum aerospace work. The No. 50 taper at 10,000 RPM provides maximum rigidity and depth of cut for aggressive roughing in hard materials or when using large-diameter face mills on large flat features. For most industrial buyers, the 12K high-output configuration is the best all-around choice.