Page 96 - HOLE_MAKING_CATALOG_INCH_2022_P237-P372

SELECTION 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 .0008” not exceed .0008”
Bushing Rotating Workpiece
Rotating Drill Stationary Bushing
Workpiece
Stationary Drill

Max.
.0008" Max.
.0008"

Drill Bushing and Workpiece Tolerance Relative Positioning

Pre-Drilled Hole
A large pre-drilled hole (larger than D-a) ensures Guidance bushing tolerance (G6)
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 ≤2.0 inch
HP
Coolant Volume
Coolant Pressure
PSI gallon/min 190
160
1420 132 Alloy Steel (HB300) v=330 SFM, f=.01 IPR
135
1140 106
107
850 79
80
570 53
54
Carbon Steel (HB200) v=330 SFM, f=.01 IPR
285 26 27
.394 .787 1.181 1.575 1.968 1.968 3.937 5.905 7.874 9.842 11.811 13.779
Diameter inch Diameter inch
Recommended Coolant Pressure and Volume >2.0 inch Machine Thrust Force
Coolant Pressure Coolant Volume Lbf
PSI gallon/min
1575
640 475
1350
Alloy Steel (HB300) v=330 SFM, f=.01 IPR
570 423
1125
500 370
900
425 317
675
355 264 Carbon Steel (HB200) v=330 SFM, f=.01 IPR
450
285 211
225
215 160
140 106 1.968 3.937 5.905 7.874 9.842 11.811 13.779
70 66 Diameter inch
1.968 3.937 5.905 7.874 9.842 11.811 13.779
Diameter inch
332 ISCAR