Page 298 - ISCAR(HOLE_MAKING_CATALOG_65)

USER GUIDE
GUNDRILLS mm Concentricity and Straightness Circularity

1.6
mm
0.05
0.04
1.0 0.03
0.02
0.6 0.01

400 800 mm 250 500 750 mm
Drilling Depth Drilling Depth
Stationary workpiece – rotating tool
Rotating workpiece – stationary tool

Chip Box
L

Adjustment
Driver Adapter
Drill Sealed Sealing Support
Bushing Housing Disk Bushing
L = 20xD
1- The support bushing should be according to tube diameter (D3) (see below)
Bushing Support Bushing
Based on modified DIN 179 specify the “d” diameter of the D3 indicate the tube diameter
drill head. Carbide bushing is delivered only on request. D1
D3

d L1 L

d = Drill diameter +0.02 D
Guide Bushing Support Bushing
A guide bushing is an essential component for a D3 Ext. Ø “D” Ext. Ø Length “L” Length
“L1”
“D1”
proper gundrill operation. The function of the guide 9.6 - 16,399 20 26 20 12
bushing is to direct the SUMOGUN into the material
during penetration. The diameter of the guide 9.6 - 25,999 30 38 26 16
bushing should be within 20 microns larger than the 9.6 - 25,999 45 50 26 16
diameter of the drill. Dedicated gundrill machines
are equipped with a guide bushing system. Sealing Disk
Indicate the dimensions needed for your requirements
D
D3

B
Sealing Disk
D3 Ext. Ø “D” Thick. “ B”
9.6 to 15,559 32 4
15,6 to 25,999 40 4

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