The Largest Swing in the Lineup

The ML-850 carries the largest swing we build: Φ850 mm. Its capacity splits by operation: full-stroke turning covers parts up to Φ600 mm in diameter and 1,100 mm in length, while face machining accommodates workpieces up to Φ720 × 150 mm. That combination exists for a specific part family: large flanged shafts, where a big-diameter face sits at one end of a long body. Built on a 45-degree bed, the only one in our lineup, the ML-850 pairs a 15-inch chuck (18-inch optional) and Φ134 mm spindle bore with a four-step gearbox delivering torque from 50 to 2,000 rpm, and tailstock travel of 1,320 mm behind them.

ML-850 or Its Siblings?

Long parts without the big-diameter end? The ML-800 series covers 1,000 to 3,000 mm of machining length in the Φ800 class, with Y-axis versions at every bed length. Heavy interrupted cutting? The BML-800 series carries the hand-scraped box way (see: Long-Bed CNC Turning Centers).

Q: What workpiece sizes does the ML-850 handle?

It depends on the operation: full-stroke turning covers up to Φ600 mm in diameter and 1,100 mm in length, while face machining accommodates workpieces up to Φ720 × 150 mm, all within a Φ850 mm swing with a 15-inch standard chuck (18-inch optional).

Q: Why does the ML-850 use a gearbox spindle?

A: Large diameters need torque at low speed more than they need top rpm. The four-step gearbox holds cutting force across the 50 to 2,000 rpm range where big flanges and shafts are actually machined.

Q: When should I choose the ML-800 series instead?

A: When the part is long but stays within Φ620 mm across its whole length. The 800 series carries up to 3,000 mm of machining length and offers Y-axis at every bed length.

ITEM UNIT ML-850
Standard C axis
Capacity
Swing over bed mm Φ850
Swing over saddle mm Φ600
Maximum machining diameter mm Φ720 / Φ600 Φ620 / Φ600
Maximum machining length mm STD: Φ720 x 150 +
Φ600 x 1,100
620 x 190 +
Φ600 x 1,030
Slant angle of bed 45°
Travel Range
X-axis mm 380 (360+20) 380 (310+70)
Y-axis mm
Z-axis mm 1,330 1,290
C-axis ° 360° (0.001°)
W-axis mm
Spindle
Spindle speeds rpm 50~2,000 (4-step gear box)
Spindle nose STD: A2-11
Spindle bore diameter mm STD: Φ134 (A2-11)
Front bearing inner diameter mm STD: Φ180 (A2-11)
Draw bar diameter mm STD: Φ116; OPT: Φ120
Chuck
Chuck diameter inch STD: 15″; OPT: 18″
Turret
Type Hydraulic Live-tooling (VDI60)
Stations pcs STD: 12
Model STD: LS-320;
OPT: LS-320SV
STCI4032-W2-
SMHDT32-460-530
Square tool shank mm 32 x 32
Boring bar shank diameter mm Φ50
Indexing time (0~180°) sec 3.2 2.71
Live Tool
Spindle Speeds rpm 50~3,500
Feed Rate
Rapid Traverse m/min X: 12, Z: 20
Tailstock
Type Automatic
Quill diameter mm Φ125
Quill bore taper MT5
Quill travel mm 160
Tailstock travel mm 1,320
Motors
Main-spindle kw STD: α22 (22/26); OPT : α30 (30/37)
Sub-spindle kw
Live-tool kw α12/8000/ (11/15)
Axis servo motor kw X/Z- α22 (4.0)
Hydraulic oil pump kw 2.25
Chip conveyor kw 0.2
Coolant pump kw 0.8
Accuracy
Positioning mm ±0.005
Repeatability mm ±0.004
Power
Requirements KVA 380-415/220V; STD: 30 KVA; OPT: 40 KVA
Machine size
Height cm 250
Floor space (WxD) cm 529 x 218
Packing (w/conveyor) cm 607 x 229 x 256
Net weight (w/conveyor) kg 11,820
Gross weight (w/conveyor) kg 12,600

Specifications

Resources

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