Page 15 - HOLE_MAKING_CATALOG_INCH_2022_P237-P372

USER GUIDE

Machine Setup

STS and DTS Guide Bush
Tolerance
Workpiece rotating system Guide bush tolerance should be G6 in order to keep
Workpiece - rotating Guide bush Tool - fixed consistent tool life and cutting accuracy. Diameters
for G6 tolerance are shown on the right.
øD (inch) G6 tolerance (μinch)
.630 - .709 +240 - +680 DEEP DRILLING - BTA SYSTEM
.7091 - 1.181 +280 - +800
1.1815 - 1.575 +360 - +1000

Up to Material
.0008” Guide bush System Advantage
material
Cost efficient
• Only used when the workpiece and the Hardened steel Workpiece rotating (inexpensive)
tool axis are on the same line. Tool rotating Long life
• Better hole straightness and wear resistance on guide Tungsten carbide Workpiece rotating guide bush
bush are provided compared to the tool rotating system.
• Keep the alignment between guide Guide bushing
bush and spindle within .0008”. (use hardened steel or carbide)

Tool rotating system
Tool - rotating Guide bush Workpiece - fixed

¿D

Coolant
Up to Temperature
.0008”
The proper coolant temperature is 30 - 40°C (90 - 100°F).
If the temperature exceeds this range, the
• Can be used when the workpiece and the coolant will deteriorate easily and may shorten
tool axis are not on the same line. tool life and generate poor surface finish.
• Keep the alignment between guide
bush and spindle within .0008”. Filtration
The coolant must be filtered properly in order to
DTS protect guide pads and workpiece surface.
Positioning of outer tube and guide bush
Be sure to set the outer tube more than .197” into Water-soluble type
the guide bush to properly supply the coolant. Around 10% (dilution rate 1/10) is recommended
for the concentration of water-soluble
Positioning of workpiece material and guide bush coolant in order to protect guide pads.
Sealing is not required for DTS because of
the vacuum effect, but keep the gap between
workpiece material and guide bush within .039”.
Workpiece Guide bush

Outer tube

At least
.197”
Up to .039”

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