Page 124 - HOLE MAKING CATALOG p185-310

GUNDRILLS USER GUIDE

Deep Hole Machine Accessories

Drill Sealed Sealing Support Driver Adjustment
Bushing Housing Disk Bushing dapter

Bushing Support Bushing D1
Based on modified DIN 179 specify the “d” diameter of Indicate the “d” diameter of the drill
the drill. Carbide bushing is delivered only on request.
d1
d
L1 L
d = Drill diameter +0.02
Guide Bushings D
As the gundrill is not a self-centering tool and its radial
rigidity is low (due to diameter to length ratio), a guide Support Bushing
bushing is an essential component for a proper gundrill
operation. The function of the guide bushing is to direct Tool Ø “d1” Ext. Ø “D” Ext. Ø Length Length
the gundrill into the material during penetration. The “D1” “L” “L1”
diameter of the guide bushing should be within 20 microns 1,9 - 16,399 12
larger than the diameter of the drill. Dedicated gundrill 1,9 - 25,999 20 26 20 16
machines are equipped with a guide bushing system. 16
1,9 - 34 30 38 26
Sealing Disk
Supplied with a single sealing disk or a protection sheet. 45 50 26
Indicate the dimensions needed for your requirements.
Support Bushing with “V” Form
D Indicate the “d” diameter of the drill

d1 D1

L1 L

120º D

Support Bushing with “V” Form

Tool Ø “d1” Ext. Ø “D” Ext. Ø Length Length
“D1” “ L” “ L1”
B 12
1,9 - 16,399 20 26 20 16

Sealing Disk 1,9 - 23,799 30 38 26
Ext. Ø “D”
Tool Ø “d” 20 Thick. “ B”
2 to 6 32 3
40 4
3,1 to 15,559 90 4
15,6 to 25,999 4

26 to 40

Sealing Disk with Protection

Tool Ø “d1” Ext. Ø “D” Thick. “ B”

2,9 - 5,249 20 7

5,25 - 14,449 32 11

14,45 - 25,999 40 12

26 - 41 90 12

308 ISCAR