BTA Deep Hole Drilling Machine

   BTA is an external cooling and internal chip removing type of deep hole drilling. The drill head and drill stem is connected by screw. The rigidity is higher than gun drill and the drilling efficiency is 2-4 times higher than gun drilling. BTA deep hole drilling requires higher oil pressure and sealing between workpiece and guide sleeve. This type of deep hole drilling is suitable for constant and heavy volume drilling because of high efficiency. Limited by inner space of drill stem, BTA drilling is mainly used in drilling diameter F16 – 65mm of deep hole, the max drilling hole diameter can reach 130mm.

Basic Info

description
processing method:  bta , internal chip removing
cnc system: fanuc oi mate tc / gsk980tdc (optional)
drill stem: rotary and feed, frequency speed adjustment
workpiece spindle: rotary at rated speed
guide sleeve: hydraulic driven
clamping: hydraulic chuck; hydraulic center frame
main parameter
drilling ability
1.  number of spindle:   1 pcs
2.  drilling diameter range:   16mm---30 mm
3.  max. drilling depth:  2500 mm
4.  max. workpiece diameter:  270mm
5.  clamping diameter of center frame:270 mm;500 mm
6.  max. workpiece length:    2500mm
drilling speed
1.  max. drill stem rotary speed:  2000 r/min
2.  workpiece rotary speed:   31.5 r/min
3.  feed speed range:1500 mm/min
4.  fast move speed:2000 mm/min
drilling accuracy
1.  skewness: 1.0/1000 (length to diameter ratio <100)
2.  dimensional accuracy:  it8~it11
3.  roughness:  ra1.6~ra3.2
machine power
1.  power of drill stem motor:  11 kw
2.  workpiece rotary power:    3.0 kw
3.  oil cooling power:  2.8 kw
4.  oil pump motor:   11.0+11.0 kw (double pump group)
5.  power of feed motor:  2.5 kw
6.  total power:   50 kw
hydraulic system
1.  max. flow:   150 l/min
2.  max. pressure:   6 mpa
3.  filter accuracy:   20 um
oil tank capacity:     1600 l
basic dimension & weight
1.  ground area:  8000*3000*1500mm
2.  distance between drill stem center and ground:   1070mm
3.  weight of main engine:    9 t
4.  weight of hydraulic system:    2.5 t