Punch with cylindrical head

with round stepped point

type EB

type EA

type EC

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Item no.:

252 . . . base length l2 = 7 mm Hardness: Shaft: Material HWS     HRC 62 2
  253 . . . base length l2 = 13 mm     Material HSS      HRC 64 2
  254 . . . base length l2 = 17 mm      
  The 4th digit of the item no.   Head: Material HWS
  indicates the material, see  from How to order     and HSS              HRC 50 5
         

Version:

Hardened, tempered, shaft fine ground finished.      
  Completely assembled with coil spring, How to order: For punch type EB
  grub screw and ejector. Spring pressure   Cutting diameter d1 = 4,2 mm       
  of ejector can be adjusted at grub screw   Shaft diameter d3 = 8 mm
  on head.   Total length l1 = 80 mm
      High carbon high chrome steel (HWS):
Material: HWS         = High speed steel    
  HSS          = High performance powdered steel   Punch
      EB-HWS 4,2 8 80

 

For other materials see from (Material Table)   Item no. 2542.042.08.080
       
       

d1 Gradation d2 d3 T r l2 l1
h6 d1 0 h6 0 + 0,2 + 0,5 + 0,5
      - 0,15   - 0,1 0 0 0
              63 71 80 90 100
1,0 to 2,2 0,1 5 3 3,15 0,3 7    
2,0 to 3,9 6,5 4

Choice of

7

or

17

   
2,5 to 4,9 8 5    
3,0 to 5,9 9 6
4,0 to 7,9 11 8 4,2 17
5,0 to 9,9 13 10
5,0 to 12,9 16 13
7,5 to 15,9 19 16
15,0 to 19,5 0,5 24 20  
20,0 to 24,5 29 25  

= Preferred dimensions