1.5748 Mounting Diameter

External Hexagon Broaches




Nominal Size (in) B Part #
1/4" External Hex Broach .244 1462-244
9/32" External Hex Broach .275 1462-275
5/16" External Hex Broach .305 1462-305
11/32" External Hex Broach .336 1462-336
3/8" External Hex Broach .367 1462-367
13/32" External Hex Broach .397 1462-397
7/16" External Hex Broach .428 1462-428
15/32" External Hex Broach .463 1462-463
1/2" External Hex Broach .489 1462-489
17/32" External Hex Broach .520 1462-520
9/16" External Hex Broach .551 1462-551
19/32" External Hex Broach .582 1462-582
5/8" External Hex Broach .612 1462-612
21/32" External Hex Broach .643 1462-643
11/16" External Hex Broach .674 1462-674
23/32" External Hex Broach .705 1462-705
3/4" External Hex Broach .736 1462-736


Nominal Size (mm) B Part #
6mm External Hex Broach .228 1462-228
7mm External Hex Broach .267 1462-267
8mm External Hex Broach .306 1462-306
9mm External Hex Broach .346 1462-346
10mm External Hex Broach .385 1462-385
11mm External Hex Broach .424 1462-424
12mm External Hex Broach .462 1462-462
13mm External Hex Broach .501 1462-501
14mm External Hex Broach .540 1462-540
15mm External Hex Broach .580 1462-580
16mm External Hex Broach .619 1462-619
17mm External Hex Broach .659 1462-659
18mm External Hex Broach .698 1462-698
19mm External Hex Broach .737 1462-737


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.  


  • Custom Overall Lengths Available 
  • Custom dimensions
  • MICRO forms
  • Corner radius
  • Mounting slot can be aligned with form (for holding orientation)

External Broaching Part Preparation

Pre-Turn Diameter:

  • Pre-turning the diameter of the workpiece is required for external broaching.
  • The pre-turned diameter must be smaller than the major diameter of the broach.
  • It is recommended to turn the workpiece diameter to the smallest allowable diameter so the broach will clear on the major diameter. Allowing for more clearance will reduce the required broaching pressure and increase tool life.
  • See below formulas for recommended pre-turn diameters of hex and double-hex forms.

External Form Depth:

  • Maximum recommended broach depth is 1.5 x minor diameter of form.
  • A back-chamfer or undercut will allow chips to break cleanly. The undercut should be approximately .0625" wide.

Lead Chamfer:

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

Speeds and Feeds

Speeds and feed rates for rotary broaching will depend on the material you are broaching and size form. Please refer to the Slater Tools Speeds and Feeds Chart.