Cold Formed Spur Gears: Stock & Custom

Grob’s spur gear stock allows you the flexibility to create cold formed spur gears that meet your exact specifications. We do this by creating long bar lengths of spur gear stock which allows you to cut or machine your steel spur gear to the lengths you need.

Standard Spur Gears

Available in mild to medium carbon steel, as well as aluminum
Available in either 14.5° or 20° pressure angles
Diametral Pitches ranging from 6 to 48
Modules ranging from .6 to 4
Outside Diameters (O.D.) up to 6″
AGMA 6-8 Quality
High Surface Finish, and all the advantages of cold forming

Need a custom spur gear? Call Grob Inc. We manufacture a variety of standard cold formed bar stock and custom cold formed stock, either to our specifications or to yours. For custom, simply upload your drawing through our website and we’ll contact you with a solution. Whether you use Grob standard stock or custom, you are getting a trusted name in materials and workmanship for your spur gear application. (Need help Reverse Engineering Your Spur Gear?)

Custom Spur Gears

Modified major diameters
Modified minor diameters
Modified backlash
Modified involute profiles

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Cold Formed Spur Gears: Stock & Custom

Gear Name	OD	Root	Pitch Dia	Measurement Over Pins	Pins
20-32-12	0.436	0.299	0.375	0.442	0.054
20-32-20	0.686	0.549	0.625	0.692	0.054
20-32-32	1.061	0.924	1.000	1.070	0.054
20-32-40	1.311	1.174	1.250	1.320	0.054
20-24-12	0.581	0.399	0.500	0.593	0.072
20-24-16	0.748	0.566	0.667	0.760	0.072
20-24-20	0.915	0.733	0.833	0.927	0.072
20-24-24	1.081	0.900	1.000	1.092	0.072
20-20-12	0.698	0.479	0.600	0.710	0.086
20-20-16	0.898	0.679	0.800	0.910	0.086
20-20-20	1.098	0.879	1.000	1.111	0.086
20-16-12	0.873	0.600	0.750	0.889	0.108
20-16-16	1.123	0.850	1.000	1.140	0.108
20-16-20	1.373	1.100	1.250	1.390	0.108
20-16-24	1.623	1.350	1.500	1.641	0.108
20-12-12	1.164	0.800	1.000	1.186	0.144
20-12-16	1.498	1.134	1.333	1.520	0.144
20-12-24	2.165	1.801	2.000	2.189	0.144