Page 278 - ISCAR(HOLE_MAKING_CATALOG_65)

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

C0.3 0.5
˜
Up to 1 mm Workpiece Guide Bushing Oil Pressure Head
Up to 1.5 mm Recommended for Ø65 mm and less

30 60°
˜
Workpiece Guide Bushing Oil Pressure Head
0.5 1.0 mm
˜
Taper Cone Type

C0.3 0.5 Guide Bush
˜
C0.3 0.5
˜
Up to 2 mm Guide Bushing Tolerance

Workpiece DG6 Dh6
Gap Guide Bushing Oil Pressure Head

Tool Diameter D (mm) G6 Tolerance (mm)
8.00 - 10.00 +0.005 ~ +0.014
10.01 - 18.00 +0.006 ~ +0.017
18.01 - 30.00 +0.007 ~ +0.020
30.01 - 50.00 +0.009 ~ +0.025
50.01 - 80.00 +0.010~ +0.029
80.01 - 120.00 +0.012 ~ +0.034
120.01 - 180.00 +0.014 ~ +0.039
180.01 - 245.99 +0.015 ~ +0.044

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