Page 90 - HOLE MAKING CATALOG p185-310

DEEP DRILLING - BTA SYSTEM USER GUIDE

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
Workpiece
Rotating Drill Bushing

Stationary Drill

Max. Max.
0.02 mm 0.02 mm

Drill Bushing and Workpiece Tolerance Relative Positioning

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

A 0.5 X A max

Recommended Coolant Pressure and Volume ≤50 mm Machine Power
kw

Coolant Pressure Coolant Volume 140
Kgf/cm2 L/min
120 Alloy Steel (HB300)
v=100m/min, f=0.25mm/rev

100 500 100
80 400
60 300 80
40 200
20 100 60
40 Carbon Steel (HB200)
10 20 30 40 50
Diameter mm v=100m, f=0.25mm/rev
20

Recommended Coolant Pressure and Volume >50 mm 50 100 150 200 250 300 350
Diameter mm

Coolant Pressure Coolant Machine Thrust Force
Kgf/cm2 Volume
L/min N
45
1800 7000

40 1600 6000 Alloy Steel (HB300)
v=100m/min, f=0.25mm/rev
35 1400
5000
30 1200
4000 Carbon Steel (HB200)
25 1000 3000 v=100m, f=0.25mm/rev
2000
20 800
15 600 1000
10 400

5 250

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

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