Page 112 - HOLE MAKING CATALOG p185-310

GUNDRILLS USER GUIDE

Concentricity and Straightness Circularity

mm mm
1.6 0.05
0.04
1.0 0.03
0.02
0.6 0.01

400 800 mm 250 500 750 mm

Stationary workpiece – rotating tool Drilling Depth Drilling Depth
Rotating workpiece – stationary tool

Chip Box

L

Drill Sealed Sealing Support Driver Adjustment
Bushing Housing Disk Bushing Adapter

L = 20xD D1
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.
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
proper gundrill operation. The function of the guide “D1” “L1”
bushing is to direct the SUMOGUN into the material 12
during penetration. The diameter of the guide 9.6 - 16,399 20 26 20 16
bushing should be within 20 microns larger than the 16
diameter of the drill. Dedicated gundrill machines 9.6 - 25,999 30 38 26
are equipped with a guide bushing system.
9.6 - 25,999 45 50 26

Sealing Disk

Indicate the dimensions needed for your requirements

D
D3

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

296 ISCAR