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USER GUIDE
DEEP DRILLING - BTA SYSTEM
Technical Information - Notes for Guide Bushing Installation
Many of the problems in BTA drilling are caused by Flat edge type
incorrect use of the guide bushing.
The shape, type and tolerance greatly affect
cutting accuracy and tool life. Please note the
following when using one in your application.
Resin seal type
Resin Seal
C.012-.02"
Up to .04” Workpiece Guide Bush Oil Pressure Head
Up to .06” Recommended for Ø2.56" and less
30 60°
˜
Workpiece Guide Bush Oil Pressure Head
.02-.04"
Taper cone type
C.012-.02" Guide Bush
CC.012-.02"
Guide bushing tolerance
Up to .08”
DG6 Dh6
Workpiece
Gap Guide Bush Oil Pressure Head
Tool diameter D (inch) G6 tolerance (µinch)
.315-.394 +200~ +560
.394-.708 +240~ +680
.709-1.180 +280~ +800
1.181-1.968 +360~ +1000
1.969-3.149 +400~ +1160
3.150-4.724 +480~ +1360
4.725-7.086 +560~ +1560
7.087-9.685 +600~ +1760
334 ISCAR
