.315" Shank Diameter | Square Broaches | Internal Rotary Broaches | Slater Tools, Your Source for Rotary Broaching and Screw Machine Tools

Square Broaches

Slater Tools offers the largest inventory of stocked Square Rotary Broaches. The below listed sizes are available for immediate delivery in a variety of materials and coatings. Additional sizes are also available from stock. Across the flats dimensions conform to IFI and ANSI/ASME standards for maximum tool life. With over 60 years of experience and our refined manufacturing process, we are able to produce any custom size or other special Square Rotary Broach in only 1-2 days. Vent holes, quantity discounts, and broach re-sharpening are available.

Shank Diameters:

.315" .500" .750"

Custom Squares (1-2 Days)

DIAMETER: .315" Shank Diameter
OVERALL LENGTH: 1.25”

ENGLISH SIZES

Nominal Sizes (in)	B	D	Part #
1/16" Square Broach	.064	.81	304-064
5/64" Square Broach	.079	.81	304-079
3/32" Square Broach	.095	.75	304-095
7/64" Square Broach	.111	.75	304-111
1/8" Square Broach	.127	.75	304-127
9/64" Square Broach	.142	.75	304-142
5/32" Square Broach	.159	.75	304-159
11/64" Square Broach	.174	.62	304-174
3/16" Square Broach	.190	.62	304-190
7/32" Square Broach	.222	.62	304-222
1/4" Square Broach	.253	.62	304-253
9/32" Square Broach	.284	.62	304-284
5/16" Square Broach	.316	.62	304-316
11/32" Square Broach	.347	.62	304-347
3/8" Square Broach	.379	.62	304-379
13/32" Square Broach	.410	.62	304-410

METRIC SIZES

Nominal Sizes (mm)	B	D	Part #
1.25mm Square Broach	.051	.81	304-051
1.5mm Square Broach	.061	.81	304-061
2mm Square Broach	.081	.81	304-081
2.5mm Square Broach	.101	.75	304-101
3mm Square Broach	.121	.75	304-121
4mm Square Broach	.161	.75	304-161
5mm Square Broach	.200	.62	304-200
6mm Square Broach	.240	.62	304-240
7mm Square Broach	.279	.62	304-279
8mm Square Broach	.320	.62	304-320
9mm Square Broach	.358	.62	304-358
10mm Square Broach	.399	.62	304-399

COATING OPTIONS

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.

MATERIAL OPTIONS

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.

OTHER CUSTOM OPTIONS

Custom Overall Lengths Available (including 28mm)
Custom Cut Lengths Available
Special across-the-flat dimensions
MICRO forms
Corner radius
Spun Ground Diameter on Broach Corners
Single or Double Vent Holes
Flat on shank can be aligned with flat on form (for holding orientation)

INTERNAL BROACHING PART PREPARATION

Pre-Drill Hole Diameter:

A pre-drill hole is required for internal broaching.
The pre-drill hole must be at least equal to the minor diameter of the broach. It is strongly recommended to open the hole diameter larger than the minor diameter.
See below formulas for recommended pre-drill hole diameters of hex and square forms.

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 internal rotary broaching, going from the major diameter to the minor 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.