Twist Drill :

High Speed Steel Shell Core Drills
High Speed Steel
Shell Core Drills
With Taper Bore & Slot Drive
 

High Speed Steel Shell Core Drills
 
 
Nominal Diameter H8 Diameter of Large end of Taper Blow Overall Length
25    
26    
27    
28    
29    
30 13 45
31    
32    
33    
34    
35    
36    
37    
38    
39    
40 16 45
42    
44    
45    
46    
47    
48 19 50
50    
52    
55    
58    
60 22 56
65    
70    
72 27 71
75    
80    
85 32 80
90    

Nominal Diameter H8 Diameter of Large end of Taper Blow Overall Length
95 40 90
100    
1    
1.1/16    
1.1/8 5/8 2.3/4
1.3/16    
1.1/4    
1.5/16    
1.3/8    
1.7/16 3/4 3
1.1/2    
1.9/16    
1.5/8    
1.11/16    
1.3/4    
1.13/16 1 3.1/2
1.7/8    
1.15/16    
2    
2.1/8    
2.1/4 1.1/4 3.3/4
2.3/8    
2.1/2    
2.5/8    
2.3/4 1.1/2 4
2.7/8    
3    
3.1/8    
3.1/4 1.3/4 4.1/2
3.3./8    
3.1/2    
3.5/8    
3.3/4    
3.7/8 2 5
4    


Dimension in mm.

Specifications Conform to IS : 7772 - 1975 / ISO 3314 - 1975

These Shell Core Drills have Rh Helical Flutes for Rh Cutting.

Taper Bore - Taper 1:30


Specification conform to IS:7823-1983/ISO 3292-1975

FL=flute length     OAL= overall length


 
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