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Index / Static Punch Broaching




Index punch broaching is typically used on CNC machining centers for applications:
  • Where the machine cannot generate enough thrust to form the entire shape desired.
  • With more stringent requirements on the straightness of the form than can be achieved with rotary broaching.
The process involves punching a partial form in a prepared hole and indexing the spindle the required number of times to produce the finished form.

All Indexing broaches are made to order from superior Forte material to suit your application. Email sales@sommatool.com for a quote.





ADAPTER HEADS ARE PERFECTLY CENTERED DUE TO 90° TIMING OF THE FLAT ON THE SHANK OF THE TOOLHOLDER TO THE I.D. NOTCHES ON THE FRONT OF THE TOOLHOLDER AND THE SAME TIMING OF THE PINS ON THE ADAPTER HEADS TO THE SCREWS HOLDING THE BROACH TOOL.

Index Punch Broaching Assembly for 8mm Diameter Shank Broaches

Holder Shank Size OAL Part Number
1/2" 5-1/8" SS050PBH8
5/8" 5-1/8" SS062PBH8
3/4" 5-1/8" SS075PBH8
1" 3-5/8" SS100PBH8
1" 5-1/8" SS100PBH8-L
16mm 5-1/8" SS16PBH8
20mm 87mm SS20PBH8
20mm 120mm SS20PBH8-L
22mm 134mm SS22PBH8
25mm 76mm SS25PBH8
25mm 111mm SS25PBH8-L


Index Punch Broaching Assembly for 1/2" Diameter Shank Broaches

Holder Shank Size OAL Part Number
1" 6-1/8" SS100PBH32
1-1/4" 6-1/8" SS125PBH32
1-1/2" 7-1/2" SS150PBH32