Square Rotary Broaches with 8mm Shank

Polygon Solutions’ 8mm shank square rotary broaches are precision ground with a tolerance of +0/-.0005. Each nominal size conforms to the industry standard – ANSI B18.3 2003. All 8mm shank square rotary broach tools include a pressure relief vent hole that allows air and fluid to freely escape during the rotary broaching process to reduce wear on your machine and extend rotary broach tool life.

8mm Shank Diameter x 1-1/4″ Overall Length
All Broaches Larger than 5/64″ Include Pressure Relief Vent Hole

Nominal Size (Inches)	Across Flats (A)	Broaching Depth (B)	Includes Vent Hole	Part Number	Price	Order
1/16″ Square Rotary Broach	.0635	.127		S00635A	$54.00
5/64″ Square Rotary Broach	.0790	.158		S00790A	$54.00
3/32″ Square Rotary Broach	.0950	.190		S00950A	$54.00
7/64″ Square Rotary Broach	.1110	.222		S01110A	$54.00
1/8″ Square Rotary Broach	.1265	.253		S01265A	$54.00
9/64″ Square Rotary Broach	.1425	.285		S01425A	$54.00
5/32″ Square Rotary Broach	.1585	.317		S01585A	$54.00
11/64″ Square Rotary Broach	.1740	.348		S01740A	$54.00
3/16″ Square Rotary Broach	.1895	.379		S01895A	$54.00
7/32″ Square Rotary Broach	.2215	.443		S02215A	$54.00
1/4″ Square Rotary Broach	.2525	.505		S02525A	$71.00
9/32″ Square Rotary Broach	.2840	.568		S02840A	$71.00

Nominal Size (Metric)	Across Flats (A)	Broaching Depth (B)	Includes Vent Hole	Part Number	Price	Order
1.30mm Square Rotary Broach	.0515	.103		S00515A	$54.00
1.50mm Square Rotary Broach	.0610	.122		S00610A	$54.00
2mm Square Rotary Broach	.0810	.162		S00810A	$54.00
2.50mm Square Rotary Broach	.1010	.202		S01010A	$54.00
3mm Square Rotary Broach	.1210	.242		S01210A	$54.00
3.50mm Square Rotary Broach	.1410	.282		S01410A	$54.00
4mm Square Rotary Broach	.1610	.322		S01610A	$54.00
5mm Square Rotary Broach	.2000	.400		S02000A	$54.00
6mm Square Rotary Broach	.2400	.480		S02400A	$71.00
7mm Square Rotary Broach	.2790	.558		S02790A	$7100

• Custom Dimension
• Cut Length
• Dish Angle
• Vent Holes
• Tolerance
• Corner Radius

Our Square Rotary Broaches can be ordered in custom dimensions. Can’t find the size you’re looking for? Polygon Solutions provides fast delivery on custom ½” or 8mm shank square rotary broaches. Simply specify the desired across flat dimension when ordering. Polygon’s manufacturing tolerance is +0/-.0005”. For example, a custom square broach with 0.1234” across flat dimension is part number S01234B.

If you need a square rotary broach to cut deeper than our standard dimensions, perhaps to clear a counter-bore, you can request a custom cut length. Custom cut lengths may be limited by the back-taper on the side of the square broach, or manufacturing limitations. Please call (239) 628-4800 for more information. Rotary broaching more than 1-2x the across flat dimension may not be successful. Broaches may also be weakened because of a deeper cut length.

The standard rake angle (also called the dish angle) is critical to help the chip curl while rotary broaching. However, the rake angle can be modified to suit specific materials. For example, some softer materials may require a steeper angle. Broaching tougher materials may be improved with less, or no rake angle. Please call (239) 628-4800 for more information.

Single vent holes are standard with square rotary broach forms larger than .079″ and allow air and/or fluid to pass though the hex broach and reduce any hydraulic pressure that may occur when broaching a blind hole. Polygon’s rotary broach tool holder is also designed with this feature. However, an additional cross vent hole can be added for holders without the pressure relief system.

All of Polygon Solution’s square rotary broaches are manufactured with a +0/-.0005” tolerance. However, square broaches can be manufactured to a tighter +0/-.0004” tolerance. If you want to use the broach as a gauge, the square broach can also be manufactured without a back-taper. For more information, see Rotary Broach Gauges.

If you part allows for a corner radius, we can add a spun ground diameter to the square broach to remove the sharp corners. The spun ground diameter is useful for reducing the chip size and pressure required for long tool life and successful rotary broaching operations.