Page 276 - ISCAR(HOLE_MAKING_CATALOG_65)

USER GUIDE
DEEP DRILLING - BTA SYSTEM

Technical Information -
Drill Setup

Rotating Drill Stationary Drill
• Can be applied on symmetrical and • Applied on symmetrical workpieces
non-symmetrical workpieces • Improved hole straightness and bushing wear
• Drill to bushing center misalignment should • Drill to bushing center misalignment should
not exceed 0.02 mm not exceed 0.02 mm
Bushing Stationary Rotating Workpiece
Rotating Drill Workpiece Bushing

Stationary Drill

Max. Max.
0.02 mm 0.02 mm

Drill Bushing and Workpiece Tolerance Relative Positioning

Pre-drilled Hole Guidance bushing tolerance (G6)
A large pre-drilled hole (larger than D-a) ensures
precise hole size and center location. Hole tolerance Drill head tolerance (h6)
A 0.5 X A max

Machine Power
Recommended Coolant Pressure and Volume ≤50 mm kw
Coolant Pressure Coolant Volume 140
Kgf/cm 2 L/min 120 Alloy Steel (HB300)
v=100m/min, f=0.25mm/rev
100 500 100
80 400 80
60 300 60
40 200
40 Carbon Steel (HB200)
20 100 v=100m, f=0.25mm/rev
20
10 20 30 40 50
Diameter mm 50 100 150 200 250 300 350
Diameter mm
Recommended Coolant Pressure and Volume >50 mm
Coolant Pressure Coolant Machine Thrust Force
Kgf/cm 2 Volume
L/min N
45 1800 7000
40 1600 6000 Alloy Steel (HB300)
35 1400 v=100m/min, f=0.25mm/rev
30 1200 5000
25 1000 4000
20 800 3000 Carbon Steel (HB200)
15 600 v=100m, f=0.25mm/rev
10 400 2000
5 250 1000

50 100 150 200 250 300 350 50 100 150 200 250 300 350
Diameter mm Diameter mm

274 ISCAR