JS Machinery Co., Ltd.
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Product Description

BM series, a beam moving bridge type CNC milling machine center, is special designed for large workpiece machining which could contains maximal 2,400mm height of workpieces. Vision Wide applies unique techniques to synchronize W-axis feeding with other axial feeding, and ensure the movable beam’s dynamic straightness and heavy cutting power. We provide X travel from 4,200 mm to 10,200mm, Y travel from 3,000 mm to 4,200 mm, and W travel from 1,000 to 1,500 mm, and multi-angle head attachments for automatic machining.

Product Feature

  • BM series 5 faces machines, with typical VW products features of rigid structure and high precision, is unique by the features of movable cross rail and W-axis feed cutting synchronic with other axial feeding. The max. height for work piece & machining is 2,450mm & 2,400mm.
  • The movable cross rail can be positioned precisely by dual synchronized servo motors driving system. Besides, it can carry precision feeding and heavy cutting on W-axis.
  • Rationing hydraulic system precisely control the parallelism of cross rail travel, even with different position of headstock on Y-travel. Dual cylinders offer strong supporting for W-axis smooth movement.
  • Double beams configuration: Fixed beam to keep the best parallelism and maintain the structure rigidity; Movable beam to have the dynamic straightness and sustain the cutting power.
  • Precise clamping device can hold the cross beam tightly, well controlling and supporting the spindle cutting accuracy.
  • Automatic horizontal and vertical tool changer.
  • Automatic head magazine (one head)
  • AH attachment-Automatic 5-face function with 700mm longer Y-travel

Product Specification

BM Series BM-
4230/
4237		 BM-
5230/
5237		 BM-
6230/
6237		 BM-
8230/
8237		 BM-
10230/
10237
X axis (mm) 4,200 5,200 6,200 8,200 10,200
Y axis (mm) 3,000/3,700
Z axis (mm) 1,000/1,200(Opt.)/1,400(Opt.)
W axis (mm) 1,000/1,200(Opt.)/1,500(Opt.)
Table dimension (mm) 4,000×
2,600		 5,000×
2,600		 6,000×
2,600		 8,000×
2,600		 10,000×
2,600
Max. table load (kg) 20,000 24,000 28,000 32,000 36,000
Spindle motor (Continuous/ 30 minutes rated) (kw) 22/26 (30/37Opt.)
Spindle speed (2-step gear) (rpm) 22/26kW: 4,000/6,000(Opt.) ; 30/37kW 3000(Opt.)/5500(Opt.)
Spindle speed (direct-driven) (rpm) 8,000(Opt.)/ 10,000(Opt.)
Spindle taper (mm/min) ISO NO. 50
Cutting feed rate (mm/min) XYZ：1~7,000 W：1,000
Rapid traverse (m/min) XY：10
Z：12
W：2		 X：8
Y：10
Z：12
W：2
Positioning accuracy (mm) Refer to JIS B6333 ±0.01/300, ±0.015 Full travel
Repeatability (mm) Refer to JIS B6333 ±0.003
ATC type/capacity (pcs) Floor-standing Vertical type tool change 60/90(Opt.)
Floor-standing type vertical-horizontal tool change( fixed) 32(Opt.)/40(Opt.)/60(Opt.)
Floor-standing type vertical-horizontal tool change(random) 60(Opt.)/90(Opt.)
Machine gross weight (kg) 68,000/
70,000		 73,000/
75,000		 80,000/
82,000		 94,000/
96,000		 102,000/
104,000
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