Brass Sprockets | McMaster-Carr

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Number of Teeth

System of Measurement

Gear Pitch Diameter

Shaft Diameter

Gear Pitch

Pressure Angle

Material

Gear Module

Face Width

Bore Type

Gear Type

Overall Width

Gear Rack Shape

Hub Diameter

Hub Width

Height

Length

Pitch Height

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EAR99

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86 Products

About Gears

Compare gear types, measure pitch and module, calculate mounting distance, increase speed or torque, and more.

Metal Spur Gears

Our strongest spur gears for transferring motion. They’re better than plastic gears for high-load, high-speed, and heavy duty applications. Combine a gear and rack to convert rotary motion into linear motion. To minimize your footprint, mount one or more standard gears inside of an internal gear.

Combine gears with different numbers of teeth to change speed and torque in your assembly. For components to mesh correctly, they must have the same pressure angle and pitch/module.

Gears


20° Pressure Angle Round Bore	Gear with Round Bore and Set Screw	Gear with Keyed Bore and Set Screw

20° Pressure Angle—The current industry standard, these 20° pressure angle spur gears have thicker, stronger teeth than 14½° pressure angle gears.

Brass—Brass gears are easy to machine, so you can add your own mounting holes and make other alterations. They won't rust when exposed to water.

							Hub				Keyway, mm
	Gear Pitch	Gear Module	No. of Teeth	Gear Pitch Dia.	OD	Face Wd.	Dia.	Wd.	Bore Type	For Shaft Dia.	Wd.	Dp.	Material		Each
20° Pressure Angle







				Brass

				64	—	16	1/4"	0.28"	1/8"	0.19"	0.19"	Round Bore	1/8"	—	—	Brass	7880K11	000000


				64	—	24	3/8"	0.41"	1/8"	0.28"	0.19"	Round Bore	1/8"	—	—	Brass	7880K13	00000
				64	—	28	0.438"	0.47"	1/8"	0.34"	0.19"	Round Bore	1/8"	—	—	Brass	7880K14	00000
				48	—	12	1/4"	0.29"	1/8"	0.18"	0.19"	Round Bore	1/8"	—	—	Brass	7880K17	00000
				48	—	15	0.312"	0.35"	1/8"	0.22"	0.19"	Round Bore	1/8"	—	—	Brass	7880K18	00000
				48	—	18	3/8"	0.42"	1/8"	0.28"	0.19"	Round Bore	1/8"	—	—	Brass	7880K19	00000
				48	—	24	1/2"	0.54"	1/8"	0.38"	0.25"	Round Bore	3/16"	—	—	Brass	7880K21	00000
				48	—	36	3/4"	0.79"	1/8"	0.5"	0.25"	Round Bore	3/16"	—	—	Brass	7880K23	00000
				48	—	48	1"	1.04"	1/8"	0.63"	0.25"	Round Bore	1/4"	—	—	Brass	7880K24	00000
				32	—	12	3/8"	0.44"	3/16"	0.28"	0.25"	Round Bore	1/8"	—	—	Brass	7880K25	00000
				32	—	14	0.438"	0.5"	3/16"	0.34"	0.25"	Round Bore	1/8"	—	—	Brass	7880K26	00000


				32	—	16	1/2"	0.56"	3/16"	0.4"	0.25"	Round Bore	3/16"	—	—	Brass	7880K27	00000
				32	—	20	5/8"	0.69"	3/16"	0.47"	0.25"	Round Bore	3/16"	—	—	Brass	7880K29	00000
				32	—	24	3/4"	0.81"	3/16"	0.53"	0.25"	Round Bore	3/16"	—	—	Brass	7880K31	00000
				32	—	28	7/8"	0.94"	3/16"	0.59"	0.25"	Round Bore	3/16"	—	—	Brass	7880K32	00000
				32	—	36	1 1/8"	1.19"	3/16"	0.72"	0.25"	Round Bore	1/4"	—	—	Brass	7880K34	00000
				32	—	40	1 1/4"	1.31"	3/16"	0.72"	0.25"	Round Bore	1/4"	—	—	Brass	7880K35	00000
				32	—	48	1 1/2"	1.56"	3/16"	0.78"	0.25"	Round Bore	1/4"	—	—	Brass	7880K36	00000
				24	—	12	1/2"	0.58"	1/4"	0.38"	0.25"	Round Bore	3/16"	—	—	Brass	7880K37	00000
				24	—	15	5/8"	0.71"	1/4"	0.5"	0.25"	Round Bore	3/16"	—	—	Brass	7880K38	00000
				24	—	18	3/4"	0.83"	1/4"	0.54"	0.25"	Round Bore	3/16"	—	—	Brass	7880K39	00000


				24	—	21	7/8"	0.96"	1/4"	0.6"	0.25"	Round Bore	3/16"	—	—	Brass	7880K41	00000
				24	—	36	1 1/2"	1.58"	1/4"	0.79"	0.25"	Round Bore	1/4"	—	—	Brass	7880K44	00000
				24	—	48	2"	2.08"	1/4"	0.92"	0.31"	Round Bore	5/16"	—	—	Brass	7880K45	000000
				—	0.5	15	7.5 mm	8.5 mm	3 mm	8.5 mm	11 mm	Round Bore with Set Screw	3 mm	—	—	Brass	2664N406	00000
				—	0.5	16	8 mm	9 mm	3 mm	9 mm	11 mm	Round Bore with Set Screw	3 mm	—	—	Brass	2664N407	00000
				—	0.5	17	8.5 mm	9.5 mm	3 mm	9.5 mm	11 mm	Round Bore with Set Screw	3 mm	—	—	Brass	2664N408	00000
				—	0.5	20	10 mm	11 mm	3 mm	8.5 mm	7 mm	Round Bore	4 mm	—	—	Brass	2664N411	00000
				—	0.5	20	10 mm	11 mm	3 mm	11 mm	11 mm	Round Bore with Set Screw	3 mm	—	—	Brass	2664N412	00000
				—	0.5	21	10.5 mm	11.5 mm	3 mm	11.5 mm	11 mm	Round Bore with Set Screw	3 mm	—	—	Brass	2664N413	00000
				—	0.5	22	11 mm	12 mm	3 mm	9 mm	7 mm	Round Bore with Set Screw	3 mm	—	—	Brass	2664N414	00000


				—	0.5	24	12 mm	13 mm	3 mm	10 mm	7 mm	Round Bore with Set Screw	3 mm	—	—	Brass	2664N416	00000
				—	0.5	24	12 mm	13 mm	3 mm	10 mm	7 mm	Round Bore with Set Screw	4 mm	—	—	Brass	2664N417	00000
				—	0.5	25	12.5 mm	13 mm	3 mm	10 mm	7 mm	Round Bore with Set Screw	3 mm	—	—	Brass	2664N419	00000
				—	0.5	25	12.5 mm	13.5 mm	3 mm	11 mm	7 mm	Round Bore	4 mm	—	—	Brass	2664N418	00000
				—	0.5	30	15 mm	16 mm	3 mm	12 mm	7 mm	Round Bore with Set Screw	3 mm	—	—	Brass	2664N424	00000
				—	0.5	30	15 mm	16 mm	3 mm	12 mm	7 mm	Round Bore with Set Screw	4 mm	—	—	Brass	2664N425	00000
				—	0.5	30	15 mm	16 mm	3 mm	13 mm	7 mm	Round Bore	4 mm	—	—	Brass	2664N423	00000
				—	0.5	36	18 mm	19 mm	3 mm	16 mm	7 mm	Round Bore with Set Screw	4 mm	—	—	Brass	2664N431	00000
				—	0.5	40	20 mm	21 mm	3 mm	18 mm	7 mm	Round Bore with Set Screw	4 mm	—	—	Brass	2664N434	00000
				—	0.5	50	25 mm	26 mm	3 mm	22 mm	7 mm	Round Bore with Set Screw	4 mm	—	—	Brass	2664N435	00000


				—	0.5	70	35 mm	36 mm	3 mm	28 mm	7 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N436	00000
				—	0.8	17	13.6 mm	15.2 mm	4 mm	10 mm	8 mm	Round Bore with Set Screw	4 mm	—	—	Brass	2664N437	00000
				—	0.8	18	14.4 mm	16 mm	4 mm	10 mm	8 mm	Round Bore with Set Screw	4 mm	—	—	Brass	2664N438	00000
				—	0.8	20	16 mm	17.6 mm	4 mm	13 mm	8 mm	Round Bore	5 mm	—	—	Brass	2664N441	00000
—				0.8	21	16.8 mm	18.4 mm	4 mm	14 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N442	00000
—	0.8			23	18.4 mm	20 mm	4 mm	15 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N443	00000
—	0.8			24	19.2 mm	20.8 mm	4 mm	16 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N445	00000
—	0.8			25	20 mm	21.6 mm	4 mm	16 mm	8 mm	Round Bore with Set Screw	4 mm	—	—	Brass	2664N447	00000
—	0.8			26	20.8 mm	22.4 mm	4 mm	18 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N449	00000
—	0.8	30		24 mm	25.6 mm	4 mm	20 mm	8 mm	Round Bore with Set Screw	4 mm	—	—	Brass	2664N454	00000
—	0.8	30	24 mm	25.6 mm	4 mm	20 mm	8 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N456	00000
—	0.8	32	25.6 mm	27.2 mm	4 mm	22 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N457	00000
—	0.8	36	28.8 mm	30.4 mm	4 mm	25 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N461	00000
—	0.8	40	32 mm	33.6 mm	4 mm	28 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N464	00000
—	0.8	50	40 mm	41.6 mm	4 mm	28 mm	8 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N466	00000
—	0.8	60	48 mm	49.6 mm	4 mm	28 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N467	00000
—	1	16	16 mm	18 mm	6 mm	12 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N468	00000
—	1	17	17 mm	19 mm	6 mm	14 mm	8 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N469	00000
—	1	18	18 mm	20 mm	6 mm	15 mm	8 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N471	00000
—	1	19	19 mm	21 mm	6 mm	16 mm	8 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N472	00000
—	1	20	20 mm	22 mm	6 mm	16 mm	8 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N473	00000
—	1	21	21 mm	23 mm	6 mm	18 mm	8 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N474	00000
—	1	23	23 mm	25 mm	6 mm	20 mm	8 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N475	00000
—	1	24	24 mm	26 mm	6 mm	20 mm	8 mm	Round Bore with Set Screw	8 mm	—	—	Brass	2664N477	00000
—	1	30	30 mm	32 mm	6 mm	25 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N485	00000
—	1	30	30 mm	32 mm	6 mm	25 mm	8 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N486	00000
—	1	32	32 mm	34 mm	6 mm	28 mm	8 mm	Round Bore with Set Screw	5 mm	—	—	Brass	2664N488	00000
—	1	32	32 mm	34 mm	6 mm	28 mm	8 mm	Round Bore with Set Screw	8 mm	—	—	Brass	2664N491	00000
—	1	32	32 mm	34 mm	6 mm	28 mm	8 mm	Keyed Bore with Set Screw	10 mm	4	1.8	Brass	2664N492	00000
—	1	36	36 mm	38 mm	6 mm	28 mm	8 mm	Round Bore with Set Screw	8 mm	—	—	Brass	2664N496	00000
—	1	40	40 mm	42 mm	6 mm	28 mm	8 mm	Round Bore with Set Screw	6 mm	—	—	Brass	2664N499	00000
—	1	40	40 mm	42 mm	6 mm	28 mm	8 mm	Round Bore with Set Screw	8 mm	—	—	Brass	2664N501	00000
—	1	40	40 mm	42 mm	6 mm	28 mm	8 mm	Keyed Bore with Set Screw	10 mm	4	1.8	Brass	2664N502	00000
—	1	50	50 mm	52 mm	6 mm	28 mm	8 mm	Round Bore with Set Screw	8 mm	—	—	Brass	2664N503	00000

Gear Racks

20° Pressure Angle—Rectangular

These racks match with spur gears to convert rotary motion to linear motion. For components to mesh correctly, they must have the same pressure angle and pitch/module.

Brass—Brass gear racks are easy to machine, so you can add your own mounting holes and make other alterations. They won't rust when exposed to water.

	Pitch Ht.	Ht.	Face Wd.	Material		Each
20° Pressure Angle—Rectangular







	Brass

	64	—	2 ft.	0.11"	1/8"	1/8"	Brass	7854K11	0000000


	48	—	2 ft.	0.104"	1/8"	1/8"	Brass	7854K12	000000
	32	—	2 ft.	0.156"	3/16"	3/16"	Brass	7854K13	000000
	24	—	2 ft.	0.208"	1/4"	1/4"	Brass	7854K15	000000
	—	0.5	300 mm	8.5 mm	9 mm	3 mm	Brass	2485N235	00000
	—	0.8	300 mm	9.2 mm	10 mm	4 mm	Brass	2485N236	00000
	—	1	300 mm	9 mm	10 mm	6 mm	Brass	2485N237	00000

Internal Gears

Image of Product. Front orientation. Internal Spur Gears. Metal Spur Gears.

Save space without losing power. Insert a standard spur gear inside one of these gears for a compact assembly that smoothly transmits motion. Combine gears with different numbers of teeth to change speed and torque in your assembly. For components to mesh correctly, they must have the same pressure angle and pitch/module.

Brass—Brass gears are easy to machine, so you can add your own mounting holes and make other alterations. They won't rust when exposed to water.

	OD	ID	Face Wd.	Finished Material		Each
20° Pressure Angle







	Brass

	32	64	2"	2.75"	1.961"	3/16"	Brass	2696N5	0000000


	32	96	3"	3.75"	2.961"	3/16"	Brass	2696N6	000000
	32	128	4"	4.75"	3.961"	3/16"	Brass	2696N7	000000
	24	72	3"	3.75"	2.95"	1/4"	Brass	2696N3	000000

Metal Internal Spur Gears

Save space without losing power. Insert a standard spur gear inside one of these gears for a compact assembly that smoothly transmits motion. These gears have teeth with a 20° pressure angle, the current industry standard. 20° pressure angle gears have thicker, stronger teeth than 14½° pressure angle gears.

Combine gears with different numbers of teeth to change speed and torque in your assembly. For components to mesh correctly, they must have the same pressure angle and pitch/module.

Brass—Brass gears are easy to machine, so you can add your own mounting holes and make other alterations. They won't rust when exposed to water.

	OD	ID	Face Wd.	Material		Each
20° Pressure Angle







	Brass

	32	64	2"	2.75"	1.961"	3/16"	Brass	2696N5	0000000


	32	96	3"	3.75"	2.961"	3/16"	Brass	2696N6	000000
	32	128	4"	4.75"	3.961"	3/16"	Brass	2696N7	000000
	24	72	3"	3.75"	2.95"	1/4"	Brass	2696N3	000000

Metal Spur Gear Racks

20° Pressure Angle—Rectangular

Ideal for heavy duty applications, these racks match with spur gears to convert rotary motion to linear motion.

For components to mesh correctly, they must have the same pressure angle and pitch/module.

20° Pressure Angle—The current industry standard, these 20° pressure angle gear racks have thicker, stronger teeth than 14½° pressure angle gear racks.

Brass—Brass gear racks are easy to machine, so you can add your own mounting holes and make other alterations. They won't rust when exposed to water.

	Pitch Ht.	Ht.	Face Wd.	Material		Each
20° Pressure Angle—Rectangular







	Brass

	64	—	2 ft.	0.11"	1/8"	1/8"	Brass	7854K11	0000000


	48	—	2 ft.	0.104"	1/8"	1/8"	Brass	7854K12	000000
	32	—	2 ft.	0.156"	3/16"	3/16"	Brass	7854K13	000000
	24	—	2 ft.	0.208"	1/4"	1/4"	Brass	7854K15	000000
	—	0.5	300 mm	8.5 mm	9 mm	3 mm	Brass	2485N235	00000
	—	0.8	300 mm	9.2 mm	10 mm	4 mm	Brass	2485N236	00000
	—	1	300 mm	9 mm	10 mm	6 mm	Brass	2485N237	00000