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Highly rigid construction for productivity
that exceeds expectations
  • ・Rugged machine structure developed using 3D-CAD and FEM analysis
  • ・Same rugged column structure as used in our proven column machining centers
  • ・Bearing bracket of feeding axis integrated into the machine
Highly rigid construction for productivity that exceeds expectations
Powerful spindles
provide heavy-duty cutting with ease
Cutting capacities
504cm3/min(face milling)
672cm3/min(end milling)
Highly rigid construction for productivity that exceeds expectations
●8,000min-1(No.40)/6,000min-1(No.50) high power spindle (Standard)
Tool Spindle
min-1
Cutting
m/
min
Feedrate
mm
/min
Width
mm
Depth
mm
Chips
cm3
/min
ø80 face mill 8 blades (cermet) 895 225 2,600 56 2.5 364
ø20 roughing end mill,
7 flutes (carbide)
3,660 230 4,300 4 20 344
ø50 insert drill 1,000 157 150 - - -
Tap M30P3.5 318 30 1,113 - - 60%
(Spindle load)

(Workpiece material: S45C)

●15,000min-1(No.40)wide-range spindle (Optional)
Tool Spindle
min-1
Cutting
m/min
Feedrate
mm/min
Width
mm
Depth
mm
Chips
cm3/min
ø80 face mill 8 blades (cermet) 895 225 3,000 56 3 504
ø20 roughing end mill,
7 flutes (carbide)
4,000 251 4,800 7 20 672
ø63 insert drill 720 142 108 - - -
Tap M30P3.5 318 30 1,113 - - 66%
(Spindle load)

(Workpiece material: S45C)

●12,000min-1(No.50)wide-range spindle (Optional)
Tool Spindle
min-1
Cutting
m/min
Feedrate
mm/min
Width
mm
Depth
mm
Chips
cm3/min
ø80 face mill 8 blades (cermet) 895 225 3,000 56 3 504
ø20 roughing end mill,
7 flutes (carbide)
4,000 251 2,800 12 20 672
ø63 insert drill 909 180 137 - - -
Tap M36P4 106 12 424 - - -

(Workpiece material: S45C)

Parts machined with higher quality
High-accuracy machining
  • ■Flatness 3μm (actual data)
    • ・Machine: MB-66VA
    • ・Machined part: Plate (LCD)
    • ・Material: A5052
    • ・Size: 560 × 600 × 60 mm
    • ・Cycle time: 50 min
    Parts machined with higher quality
  • ■Roundness 1.65μm (actual data)
    • ・Machine: MB-56VA
    • ・Machining dia: ø150 mm
    • ・Material: Al
    • ・Spindle speed: 8,000 min-1
    • ・Feedrate: 2,000mm/min
    Parts machined with higher quality
Positioning accuracy
MB-46VA with AbsoScale; actual data (measurement method based on ISO 230-2)
  • ■The exactness of bi-directional positioning
    • ・X-axis (travel 560 mm)1.7μm
    • ・Y-axis (travel 460 mm)2.4μm
    • ・Z-axis (travel 460 mm)2.2μm
  • ■Bi-directional repeatability
    • ・X-axis (travel 560 mm)1.0μm
    • ・Y-axis (travel 460 mm)1.3μm
    • ・Z-axis (travel 460 mm)1.0μm

※The “actual data” referred to above represent examples of data obtained by using ISO 230-2 test methods done at Okuma factories, and they are not guaranteed values.

Thermo-Friendly Concept
The “Thermo-friendly” concept enables remarkable machining accuracy through original structural design and thermal deformation control technology. If frees you from troublesome dimensional compensation and warm-up. Exhibits excellent dimensional stability even during consecutive operation over long periods and environmental temperature change in the plant.

Machine Specifications

Item MB-46VA <VAE>
MB-46VB <VBE>
MB-56VA
MB-56VB
MB-66VA
MB-66VB
Travels X-axis (ram saddle R/L) mm (in.) 560 <762>
(22.05 <30.00>)
1,050 (41.34) 1,500(59.06)
Y-axis (table B/F) mm (in.) 460 (18.11) 560 (22.05) 660 (25.98)
Z-axis (spindle U/D) mm (in.) 460 (18.11) 660 (25.98)
Table top to spindle nose mm (in.) 150 to 610 (5.91 to 24.02) 150 to 810 (5.91 × 31.89)
Table Max work dimension mm (in.) 760 × 460 <1,000 × 460>
(29.92 × 18.11
<39.37 × 18.11>)
1,300 × 560
(51.18 × 22.05)
1,530 × 660
(60.24 × 25.98)
Floor to table top mm (in.) 800(31.50) 850(33.46)
Max load capacity kg (lb) 500 <700>
(1,100 <1,540>)
900(1,980) 1,500
(3,300)
Spindle Spindle speed min-1 8,000 [15,000, 20,000, 25,000, 35,000] (*1)
6,000 [12,000]
Speed ranges Infinintely variable
Tapered bore 7/24 taper No. 40 [HSK-A63 / HSK-F63] (*1)
7/24 taper No. 50
Bearing dia mm (in.) ø70 [ø70, ø70, ø60, ø60] (ø2.76 [ø2.76, ø2.76, ø2.37, ø2.37]) (*1)
ø90 [ø90] (ø3.54 [ø3.54])
Feedrate Rapid traverse m/min (ipm) X-Y : 40 (1,575) Z : 32 (1,260)
Cutting feedrate mm/min (ipm) X-Y-Z : 32,000 (1,260)
Motors Spindle kW (hp) 11/7.5 [22/18.5, 30/22, 15/11, 15] (15/10 [30/25, 40/30, 20/15, 20]) (*1)
11/7.5 [26/18.5] (15/10 [35/25])
Feed axes kW (hp) X-Y-Z : 3.5 (4.7) X-Y-Z : 4.6 (6.1)
ATC Tool shank MAS BT.40 [HSK]
MAS BT.50
Pull stud MAS 2 [−]
MAS 2
Tool capacity tool 20 [32, 48] 48-tool only for MB-46VAE, MB-56VA, MB-66VA
Max tool dia
(w/adjacent tool)
mm (in.) ø90 (ø3.54)
ø100 (ø3.94)
Max tool dia
(w/o adjacent tool)
mm (in.) ø125 (ø4.92)
ø152 (ø5.98)
Max tool length mm (in.) 300 (11.81) 400 (15.75)
Max tool mass kg (lb) 8 (18) 8 (18)
12 (26) 12 [15] (26 [33])
Max tool moment N-m (ft-lbf) 7.8 (5.7) (8 kg × 100 mm (17.6 lb × 3.94 in.))
15.3 (12 kg × 130 mm)
(11.3 (26.4 lb × 5.12 in.))
15.3 [19.1]
(12 [15] kg × 130 mm)
(11.3 [14.1])
(26.4 [33] lb × 5.12 in.)
Tool selection Memory random
Machine size Height mm (in.) 2,746 (108.11) 3,295 (129.72)
Floor space mm (in.) 1,976 (2,026*2)
<2,236> × 2,810
(78 (80) <88> × 111)
2,546 × 3,123
(100 × 123)
3,035 × 3,325
(119 × 131)
Weight kg (lb) 6,800 <7,100>
(14,960 <15,620>)
8,300 (18,260) 11,200 (24,640)
7,000 <7,300>
(15,400 <16,060>)
8,500 (18,700) 11,800 (25,960)

[ ]: Optional
< >: E (extension type)
*1. 35,000 min-1 spindle (15 kW, HSK-F63) not available with MB-66VA
*2. MB-46VB