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Best-selling machine that achieves improved productivity in high accuracy parts machining SPACE TURN LB EXⅡ series

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LB3000 EX Ⅱ
LB3000 EX Ⅱ
Long-term accuracy stability and various process-intensive machining for improved productivity.
Video Brochure
Video Brochure
Best-selling lathes that achieves improved productivity in high accuracy parts machining.
Input Shaft
Input Shaft
The LB3000 EX Ⅱ is capable of a variety of machining processes, such as keyway and plane machining using the Y-axis, and gear machining using turret skiving, all in one machine.
3D Machine View
3D Machine View
A 3D representation of the LB3000 EX Ⅱ (MY).
High accuracy specifications overall assure
Slanted-box bed configuration,
with superior construction and rigidity
The primary units of headstock and turret on a box bed are optimally placed for outstanding thermal stability and high rigidity. Exhibits stable machining accuracy even in heavy cutting.
Slanted-box bed configuration with superior construction and rigidity
Thermo-Friendly Concept for unparalleled thermal stability
Okuma's Thermo-Friendly Concept is used on all the LB EX machines for extraordinary machining accuracy, using our unique machine design and thermal deviation control technology. Outstanding thermal stability in long-time continuous operation, multitasking, front and back side machining with a subspindle, and even Y-axis machining without troublesome compensation or warming up.
Improved productivity with highest machining capacity in class
LB3000 EX Ⅱ actual data
  • Turning 4.4 mm2 (Workpiece: S45C)
  • Milling performance of 200 cm3 /min (Workpiece: S45C)
Rich variation
Complete multitasking with Y-axis functions
One chuck machining even with irregularly shaped workpieces
A variety of milling operations can be accommodated with high-accuracy, wide-range Y-axis travel using a double slide system. Achieves complete multitasking with a single chucking (MY, MYW specifications).
  • Providing rich variation
  • Providing rich variation
Series lineup
The series has been expanded to four models for selection of the machine size that best suits users' machining work.
  • SPACE TURN LB2000 EX Ⅱ
    Max turning dia ø430mm
    Max work length 500mm
  • SPACE TURN LB3000 EX Ⅱ
    Max turning dia ø410mm
    Max work length 1,300mm
  • SPACE TURN LB4000 EX Ⅱ
    Max turning dia ø480mm
    Max work length 2,150mm
  • SPACE TURN LB2500 EX Ⅱ
    Max turning dia ø410mm
    Max work length 150mm

Highlighted Specs

Item Unit LB2000 EX Ⅱ LB3000 EX Ⅱ LB4000 EX Ⅱ LB2500 EX Ⅱ
Standard chuck size in 6 8 10 8
Max turning dia ømm (øin) 430 (16.93) 410 (16.14) 480 (18.90) 410 (16.14)
Max work length mm (in) 300, 520 (11.81, 20.47) 500, 1,000, 1,300
(19.69, 39.37, 51.18)
750, 1,500, 2,150
(29.53, 59.06, 84.65)
150 (5.91)
Spindle speed min-1 6,000 5,000 4,200 5,000
Turret V12 V12 V12 V12
Motor kW (hp) 11/7.5 (20 min/cont) (15/10) 22/15 (30 min/cont) (30/20) 30/22 (30 min/cont) (40/30) 22/15 (30 min/cont) (30/20)
Machine size
(W × D × H)
mm (in) 1,980 × 1,734 × 1,839
(77.95 × 68.27 × 72.40)
2,290 × 1,734 × 1,839
(90.16 × 68.27 × 72.40)
2,340 × 1,805 × 1,824
(92.13 × 71.06 × 71.81)
3,420 × 2,065 × 1,975
(134.65 × 81.30 × 77.76)
4,344 × 2,185 × 1,975
(171.02 × 86.02 × 77.76)
3,100× 1,921 × 1,955
(122.05 × 75.63 × 76.97)
4,175 × 2,390 × 2,157
(164.37 × 94.09 × 84.92)
5,515 × 2,505 × 2,005
(217.13 × 98.62 × 78.94)
1,880 × 1,840 × 1,770
(74.02 × 72.44 × 69.69)
Spec extension M, W, MY, MW M, W, MY, MW, MYW M, MY M

M: Milling, W: Sub-spindle, Y: Y-axis

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