Serration Rotary Broach Tool

Serration Rotary Broach Tool

Polygon Solutions offers fast delivery on precision ground serration rotary broach tools. Serrations are fairly simple forms generally designed with multiple sharp teeth, and governed either by a major and minor diameter or by the angle of the tooth. Serrations are commonly found at the end of shafts, as internal or external knurls, and locking features for fasteners or washers. Many serration forms can be made using rotary broaching tools in a lathe, mill or turning machine.

Standard forms specified as SAE J499, J500 and J501 are generally understood to be technically obsolete for design of new applications. However, it is needed for those existing applications where it may be required and serration broaches must be made for mating or repair parts. For the design of new applications, consult the ANSI B92.1 Involute Splines and Inspections Standard.

Various methods can be used to determine the dimensions required to manufacture a rotary broach with a serration form. International standards are available for reference, part prints may call out the needed dimensions, and it may be possible to reverse engineer a part or mating part. The keys are to determine the major and minor diameter, angle of the tooth, and number of teeth.

The size of spline forms that can be made by rotary broaching is limited by the amount of material to be removed. Usually, material removal (or tooth height) is limited to .025” per side. This limitation keeps most serrated forms under 1 inch diameter. Some smaller forms are also called star shaped.

Oversize pilot holes are required for all spline form rotary broaching applications. The pilot hole will leave a small radius at the inside corners. This radius is often acceptable because contact is still made at the outside of the form.

Due to manufacturing limitations, there is a small radius on the serration broach at the inside corner of spline teeth. However, this radius cannot be found in the finished product because the oversize pilot hole diameter removes part material in this area. The oversize pilot hole is critical for creating separated chips while broaching and reducing the pressure required to broach the form.

To request a quote on a Serration Rotary Broach fill out our online quote form or call us at 239-628-4800.

B SERIES STANDARD SERRATION BROACHES
.500″ Diameter x 1.75″ Overall Length
M-2
Part #        Price
PM M-4
Part #         Price
PM T-15
Part #         Price
Nominal Size # of Teeth (B) Major Dia.
11/32″ 12 .3480″ PS03480B-11    $275 PS03480BP-11   $290 PS03480BT-11    $290
16 .3480″ PS03480B-16    $275 PS03480BP-16   $290 PS03480BT-16    $290
21 .3480″ PS03480B-21    $275 PS03480BP-21   $290 PS03480BT-21    $290
3/8″ 14 .3790″ PS03790B-14    $275 PS03790BP-14   $290 PS03790BT-14    $290
18 .3790″ PS03790B-18    $275 PS03790BP-18   $290 PS03790BT-18    $290
23 .3790″ PS03790B-23    $275 PS03790BP-23   $290 PS03790BT-23    $290
13/32″ 15 .4100″ PS04100B-15    $275 PS04100BP-15   $290 PS04100BT-15    $290
19 .4100″ PS04100B-19    $275 PS04100BP-19   $290 PS04100BT-19   $290
24 .4100″ PS04100B-24    $275 PS04100BP-24   $290 PS04100BT-24    $290
7/16″ 16 .4415″ PS04415B-16    $275 PS04415BP-16   $290 PS04415BT-16    $290
21 .4415″ PS04415B-21    $275 PS04415BP-21   $290 PS04415BT-21    $290
26 .4415″ PS04415B-26    $275 PS04415BP-26   $290 PS04415BT-26    $290
15/32″ 17 .4730″ PS04730B-17    $275 PS04730BP-17   $290 PS04730BT-17    $290
22 .4730″ PS04730B-22    $275 PS04730BP-22   $290 PS04730BT-22    $290
28 .4730″ PS04730B-28    $275 PS04730BP-28   $290 PS04730BT-28    $290
1/2″ 18 .5040″ PS05040B-18    $290 PS05040BP-18   $305 PS05040BT-18    $305
24 .5040″ PS05040B-24    $290 PS05040BP-24   $305 PS05040BT-24    $305
30 .5040″ PS05040B-30    $290 PS05040BP-30   $305 PS05040BT-30    $305
9/16″ 20 .5665″ PS05665B-20    $290 PS05665BP-20   $305 PS05665BT-20    $305
27 .5665″ PS05665B-27    $290 PS05665BP-27   $305 PS05665BT-27    $305
34 .5665″ PS05665B-34    $290 PS05665BP-34   $305 PS05665BT-34    $305
5/8″ 23 .6290″ PS06290B-23    $290 PS06290BP-23   $305 PS06290BT-23    $305
30 .6290″ PS06290B-30    $290 PS06290BP-30   $305 PS06290BT-30    $305
38 .6290″ PS06290B-30    $290 PS06290BP-30   $305 PS06290BT-30    $305
21/32″ 24 .6600″ PS06600B-24    $305 PS06600BP-24   $320 PS06600BT-24    $320
31 .6600″ PS06600B-31    $305 PS06600BP-31   $320 PS06600BT-31    $320
39 .6600″ PS06600B-39    $315 PS06600BP-39   $330 PS06600BT-39    $330
11/16″ 25 .6915″ PS06915B-25    $308 PS06915BP-25   $320 PS06915BT-25    $320
33 .6915″ PS06915B-33    $305 PS06915BP-33   $320 PS06915BT-33    $320
41 .6915″ PS06915B-41    $315 PS06915BP-41   $330 PS06915BT-41    $330
3/4″ 27 .7540″ PS07540B-27    $305 PS07540BP-27   $320 PS07540BT-27    $320
36 .7540″ PS07540B-36    $305 PS07540BP-36   $320 PS07540BT-36    $320
45 .7540″ PS07540B-45    $320 PS07540BP-45   $335 PS07540BT-45    $335
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