.315 Shank Diameter

Hex Punch Broaches

DIAMETER: .315" Shank Diameter


Nominal Sizes (in) B Part #
.050" Hex Punch 0.051 SP3-6-051
1/16" Hex Punch 0.064 SP3-6-064
5/64" Hex Punch 0.079 SP3-6-079
3/32" Hex Punch 0.095 SP3-6-095
7/64" Hex Punch 0.111 SP3-6-111
1/8" Hex Punch 0.127 SP3-6-127
9/64" Hex Punch 0.142 SP3-6-142
5/32" Hex Punch 0.159 SP3-6-159
11/64" Hex Punch 0.174 SP3-6-174
3/16" Hex Punch 0.190 SP3-6-190
7/32" Hex Punch 0.222 SP3-6-222
1/4" Hex Punch 0.253 SP3-6-253
9/32" Hex Punch 0.284 SP3-6-284
5/16" Hex Punch 0.316 SP3-6-316
11/32" Hex Punch 0.347 SP3-6-347
3/8" Hex Punch 0.379 SP3-6-379
13/32" Hex Punch 0.410 SP3-6-410


Nominal Sizes (mm) B Part #
1.25mm Hex Punch 0.051 SP3-6-051
1.50mm Hex Punch 0.061 SP3-6-061
2mm Hex Punch 0.081 SP3-6-081
2.50mm Hex Punch 0.101 SP3-6-101
3mm Hex Punch 0.121 SP3-6-121
4mm Hex Punch 0.161 SP3-6-161
5mm Hex Punch 0.200 SP3-6-200
6mm Hex Punch 0.240 SP3-6-240
7mm Hex Punch 0.279 SP3-6-279
8mm Hex Punch 0.320 SP3-6-320
9mm Hex Punch 0.358 SP3-6-358
10mm Hex Punch 0.399 SP3-6-399
11mm Hex Punch 0.437 SP3-6-437
12mm Hex Punch 0.478 SP3-6-478


Titanium Nitride (TiN)
TiN is a gold colored PVD coating made of exceptionally hard ceramic material that improves lubricity, increases hardness and enhances abrasive wear resistance leading to increased broach tool life.

Titanium Carbonitride (TiCN)
TiCN is a purple-gray colored PVD coating formed by the addition of carbon to the TiN formula. The elevated hardness and low residual stress lead to excellent abrasive wear resistance. TiCN coating also increases lubricity of the broach and performs well under high load conditions. TiCN is commonly used in medical and aerospace applications broaching small forms in stainless steel and titanium materials.

Titanium Aluminum Nitride (TiAIN)
TiAlN is a dark gray colored PVD coating that can be used in high temperature conditions and for better lubricity. Harder than TiN, TiAlN has excellent abrasive wear resistance and is used successfully to broach many materials such as titanium, aluminum, stainless steels, and alloy steels.


M2 High Speed Steel
M2 is a molybdenum based high speed steel that is characterized by abrasion resistance, toughness and good red hardness. Slater Tools' hardened M2 broaches have an ideal balance of bending strength, toughness and wear resistance. M2 is used in a wide range of rotary broaching applications and is suitable for any broachable material.  

PM M4 High Speed Steel
PM M4 is a molybdenum-tungsten high speed steel, which is produced with a very consistent and refined structure. This structure gives PM M4 broaches several enhanced properties including improved toughness and better wear resistance. This material is good for stainless steel and titanium applications for decreased wear.  

T15 High Speed Steel
PMT15 is a high-carbon tungsten-cobalt-vanadium high speed steel, composed of very fine grain structures. T15 has excellent red hardness and abrasion resistance. Like the PM M4, the structure of PM T15 broaches improves toughness and is a good choice for improving overall broach tool life.


  • Custom overall tool lengths
  • Custom cut lengths
  • Special across-the-flat dimensions
  • Corner radius
  • Spun ground diameter on broach corners
  • Single or double vent holes
  • Alterations to flat on broach tool shank

Index Punch Broaching Part Preparation

Pre-Drill Hole Diameter:

  • A pre-drill hole is required for index punch broaching.
    • The pre-drill hole must be at least equal to the minor diameter of the finished form. It is strongly recommended to open the hole diameter larger than the minor diameter.

Pre-Drill Hole Depth:

  • The depth of the pre-drill hole must be greater than the broaching depth to allow for chips to accumulate and avoid excess packing.
  • If chips must be removed after broaching, it can be done with a drill or boring tool. A recess at the bottom of the pre-drill will allow the chips to break cleanly. The recess diameter should be larger than the major diameter of the broach.
  • It is recommended to have a pre-drill depth of 1.75 x depth of broached area.

Lead Chamfer:

  • A 45° lead chamfer must be provided for successful index punch broaching, going from the major diameter to the minor diameter of the form.

Machine Setup Parameters

  • Position broach tool a sufficient distance away from face of workpiece to allow for acceleration to full cutting speed
  • Use machine’s peck mode and feed to the desired depth. Alternatively, program the machine to rapid in and then retract the tool in .005 increments
  • Spindle lock or ability to program lock is required