32 Gears | McMaster-Carr

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Component

Gear Pitch

Number of Teeth

128

System of Measurement

Gear Pitch Diameter

Shaft Diameter

Pressure Angle

Material

Gear Type

Gear Rack Shape

Bore Type

Face Width

Hub Diameter

Overall Width

Length

Hub Width

Height

REACH

Width

Tooth Heat Treatment

Export Control Classification Number (ECCN)

EAR99

RoHS

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Compliant with Exemptions

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DFARS Specialty Metals

Exempt

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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74 Products

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 Round or Round/Machinable Bore	Gear with Round 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.

14 1/2° Pressure Angle—A former industry standard, 14½° pressure angle gears are often found in older machinery.

Steel—Steel gears have hard, strong, and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals.

Stainless Steel—Stainless steel gears resist rust in damp and wet environments, so they're commonly used in food-processing plants and other areas with frequent cleaning.

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
	Gear Pitch	No. of Teeth	Gear Pitch Dia.	OD	Face Wd.	Dia.	Wd.	Bore Type	For Shaft Dia.	Tooth Heat Treatment	Material		Each
20° Pressure Angle







				Stainless Steel

				32	20	5/8"	0.69"	3/16"	0.5"	0.25"	Round Bore with Set Screw	1/4"	Not Hardened	303 Stainless Steel	6832K52	000000


				32	24	3/4"	0.81"	3/16"	0.5"	0.25"	Round Bore with Set Screw	1/4"	Not Hardened	303 Stainless Steel	6832K53	00000
				32	32	1"	1.06"	3/16"	0.5"	0.25"	Round Bore with Set Screw	1/4"	Not Hardened	303 Stainless Steel	6832K54	00000
				32	36	1 1/8"	1.19"	3/16"	0.5"	0.25"	Round Bore with Set Screw	1/4"	Not Hardened	303 Stainless Steel	6832K55	00000
				32	48	1 1/2"	1.56"	3/16"	0.5"	0.25"	Round Bore with Set Screw	1/4"	Not Hardened	303 Stainless Steel	6832K56	00000
				32	64	2"	2.06"	3/16"	0.5"	0.25"	Round Bore with Set Screw	1/4"	Not Hardened	303 Stainless Steel	6832K57	00000
				32	72	2 1/4"	2.31"	3/16"	0.5"	0.25"	Round Bore with Set Screw	1/4"	Not Hardened	303 Stainless Steel	6832K58	00000




						Brass

						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


						14 1/2° Pressure Angle







										Steel

										32	16	1/2"	0.56"	3/16"	0.406"	0.313"	Round Bore with Set Screw	3/16"	Not Hardened	1117 Carbon Steel	6325K89	00000


										32	18	0.563"	0.63"	3/16"	0.406"	0.313"	Round Bore	3/16"	Not Hardened	1117 Carbon Steel	6325K94	00000
										32	20	5/8"	0.69"	3/16"	0.52"	0.31"	Round Bore with Set Screw	1/4"	Not Hardened	1117 Carbon Steel	6867K553	00000
										32	20	5/8"	0.69"	3/16"	0.531"	0.313"	Round Bore	1/4"	Not Hardened	1117 Carbon Steel	6325K95	00000
										32	24	3/4"	0.81"	3/16"	0.656"	0.313"	Round Bore	5/16"	Not Hardened	1144 Carbon Steel	6325K96	00000
										32	40	1 1/4"	1.31"	3/16"	0.875"	0.375"	Round Bore	3/8"	Not Hardened	1144 Carbon Steel	6325K97	00000

Gear Racks

20° Pressure Angle—Rectangular

14 1/2° 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.

Steel—Steel gear racks have strong and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals.

Stainless Steel—Stainless steel gear racks resist rust in damp and wet environments, so they're commonly used in food-processing plants and other areas with frequent cleaning.

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.

	Ht.	Face Wd.	Tooth Heat Treatment	Material		Each
20° Pressure Angle—Rectangular







	Stainless Steel

	32	18"	0.449"	1/2"	1/4"	Not Hardened	416 Stainless Steel	6832K75	0000000




			Brass

			32	2 ft.	0.156"	3/16"	3/16"	—	Brass	7854K13	000000


			14 1/2° Pressure Angle—Rectangular







							Steel

							32	2 ft.	0.156"	3/16"	3/16"	Not Hardened	1018 Low-Carbon Steel	6295K11	00000


							32	4 ft.	0.156"	3/16"	3/16"	Not Hardened	1215 Carbon Steel	6295K242	00000
							32	6 ft.	0.156"	3/16"	3/16"	Not Hardened	1215 Carbon Steel	6295K243	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

Plastic Spur Gears

Made of plastic, these spur gears run more quietly than metal gears and have good corrosion and chemical resistance. However, they’re not as strong as metal gears, so they’re best for light duty applications. Combine a gear and rack to convert rotary motion into linear 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.

Gears

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

14 1/2° Pressure Angle—A former industry standard, 14½° pressure angle gears are often found in older machinery.

Acetal—Acetal gears absorb less water than nylon gears, so they’re less likely to swell.

Nylon—Nylon gears are wear resistant, but will swell and weaken over time when wet.

						Hub
	Gear Pitch	No. of Teeth	Gear Pitch Dia.	OD	Face Wd.	Dia.	Wd.	Bore Type	For Shaft Dia.	Color		Each
20° Pressure Angle







				Acetal

				32	12	3/8"	0.44"	3/16"	0.281"	0.313"	Round Bore	5/32"	White	2662N14	00000


				32	24	3/4"	0.81"	3/16"	0.5"	0.313"	Round Bore	3/16"	White	2662N15	0000
				32	32	1"	1.06"	3/16"	0.625"	0.313"	Round Bore	1/4"	White	2662N16	0000
				32	36	1 1/8"	1.19"	3/16"	0.609"	0.313"	Round Bore	1/4"	White	2662N17	0000
				32	48	1 1/2"	1.56"	3/16"	0.625"	0.313"	Round Bore	1/4"	White	2662N18	0000
				32	96	3"	3.06"	3/16"	0.813"	0.313"	Round Bore	5/16"	White	2662N19	0000


				14 1/2° Pressure Angle
				Round Bore






								Nylon

								32	12	3/8"	0.44"	3/16"	0.25"	0.188"	Round Bore	1/8"	White	57655K32	00000


								32	14	0.438"	0.5"	3/16"	0.313"	0.25"	Round Bore	1/8"	White	57655K33	00000
								32	16	1/2"	0.56"	3/16"	0.375"	0.25"	Round Bore	3/16"	White	57655K34	00000
								32	18	0.563"	0.63"	3/16"	0.375"	0.25"	Round Bore	3/16"	White	57655K35	00000
								32	20	5/8"	0.69"	3/16"	0.5"	0.25"	Round Bore	3/16"	White	57655K36	00000
								32	22	0.688"	0.75"	3/16"	0.563"	0.25"	Round Bore	1/4"	White	57655K37	00000
								32	24	3/4"	0.81"	3/16"	0.625"	0.25"	Round Bore	3/16"	White	57655K38	00000
								32	28	7/8"	0.94"	3/16"	0.625"	0.25"	Round Bore	3/16"	White	57655K41	00000
								32	32	1"	1.06"	3/16"	0.625"	0.25"	Round Bore	1/4"	White	57655K42	00000
								32	36	1 1/8"	1.19"	3/16"	0.625"	0.25"	Round Bore	1/4"	White	57655K43	00000
								32	40	1 1/4"	1.31"	3/16"	0.625"	0.25"	Round Bore	1/4"	White	57655K45	00000


								32	48	1 1/2"	1.56"	3/16"	0.625"	0.25"	Round Bore	1/4"	White	57655K47	00000
								32	52	1 5/8"	1.69"	3/16"	0.625"	0.25"	Round Bore	1/4"	White	57655K48	00000
								32	62	1.938"	2"	1/4"	0.625"	0.375"	Round Bore	3/8"	White	57655K49	00000

Gear Racks

20° Pressure Angle—Rectangular

14 1/2° 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.

Acetal—Acetal gear racks absorb less water than nylon racks, so they’re less likely to swell.

Nylon—Nylon gear racks are wear resistant, but will swell and weaken over time when wet.

	Ht.	Face Wd.	Fabrication	Color		Each
20° Pressure Angle—Rectangular







	Acetal

	32	1	0.156"	3/16"	3/16"	Molded	Gray	2662N53	00000


	14 1/2° Pressure Angle—Rectangular







					Nylon

					32	1	0.156"	3/16"	3/16"	Molded	White	57655K62	0000

Spur Gear Stock

Machine your own gears to fit the exact face width and shaft diameter required. Gear stock has teeth with a 20° pressure angle, the current industry standard. 20° pressure angle gears have thicker, stronger teeth than 14½° pressure angle gears.

For gears to mesh correctly, they must have the same pressure angle and pitch.

	No. of Teeth	Gear Pitch Dia.	OD	Lg., ft.	For Shaft Dia.	Tooth Heat Treatment	Material		Each
20° Pressure Angle



	32	12	3/8"	0.44"	1	1/32" to 7/32"	Not Hardened	1215 Carbon Steel	6847K11	000000


	32	20	5/8"	0.69"	1	1/32" to 11/32"	Not Hardened	1215 Carbon Steel	6847K12	00000
	32	32	1"	1.06"	1	1/32" to 17/32"	Not Hardened	1215 Carbon Steel	6847K13	00000
	32	40	1 1/4"	1.31"	1	1/32" to 21/32"	Not Hardened	1215 Carbon Steel	6847K14	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

Gear Tooth Gauges

When replacing a gear, use these gauges to identify pressure angle, pitch, and module.

	For System of Measurement	For Gear Pitch	No. of Identifiers	Material		Each
For 14 1/2° Pressure Angles



	Spur	Inch	6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 36, 40, 48, 64, 80	22	Steel	2069A67	0000000


	For 14 1/2° and 20° Pressure Angles



			Spur, Bevel, Helical, Miter	Inch	3, 4, 5, 6, 8, 10, 12, 16, 20, 24, 32	22	Stainless Steel	2069A12	000000

Metal Spur Gear Racks


20° Pressure Angle—Rectangular	14 1/2° 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.

14 1/2° Pressure Angle—A former industry standard, 14½° pressure angle gear racks are often found in older machinery.

Steel—Steel gear racks have hard, strong, and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals.

Stainless Steel—Stainless steel gear racks resist rust in damp and wet environments, so they're commonly used in food-processing plants and other areas with frequent cleaning.

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.

	Ht.	Face Wd.	Tooth Heat Treatment	Material		Each
20° Pressure Angle—Rectangular







	Stainless Steel

	32	18"	0.449"	1/2"	1/4"	Not Hardened	416 Stainless Steel	6832K75	0000000




			Brass

			32	2 ft.	0.156"	3/16"	3/16"	—	Brass	7854K13	000000


			14 1/2° Pressure Angle—Rectangular







							Steel

							32	2 ft.	0.156"	3/16"	3/16"	Not Hardened	1018 Low-Carbon Steel	6295K11	00000


							32	4 ft.	0.156"	3/16"	3/16"	Not Hardened	1215 Carbon Steel	6295K242	00000
							32	6 ft.	0.156"	3/16"	3/16"	Not Hardened	1215 Carbon Steel	6295K243	00000

Plastic Miter Gears


Gears Sold Separately

Connect two shafts at a right angle without changing shaft speed or torque. Made of plastic, these gears run quieter than metal gears and have good corrosion and chemical resistance.

For two gears to mesh correctly, they must have the same pressure angle, pitch/module, and number of teeth.

Nylon—Nylon gears are self-lubricating, so they’re often used in food machinery. However, they’re not approved for direct contact with food or chemicals that will come into contact with food.

													Hub
	Gear Pitch	No. of Teeth	Pressure Angle	Gear Pitch Dia.	OD	Face Wd.	Overall Wd.	For Shaft Dia.	Mounting Distance	Material	Fabrication	Color	Dia.	Wd.		Each
Round Bore



		32	16	20°	1/2"	0.55"	0.11"	0.344"	3/16"	0.5"	Nylon	Molded	White	0.406"	0.188"	7297K13	000000


		32	24	20°	3/4"	0.8"	0.16"	0.406"	3/16"	0.688"	Nylon	Molded	White	0.5"	0.188"	7297K14	00000

Plastic Spur Gear Racks

Lightweight and resistant to corrosion and chemicals, these racks match with spur gears to convert rotary motion to linear motion in light duty applications.

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.

14 1/2° Pressure Angle—A former industry standard, 14½° pressure angle gear racks are often found in older machinery.

Acetal—Acetal gear racks absorb less water than nylon racks, so they’re less likely to swell.

Nylon—Nylon gear racks are wear resistant, but will swell and weaken over time when wet.

	Ht.	Face Wd.	Fabrication	Color		Each
20° Pressure Angle—Rectangular







	Acetal

	32	1	0.156"	3/16"	3/16"	Molded	Gray	2662N53	00000


	14 1/2° Pressure Angle—Rectangular







					Nylon

					32	1	0.156"	3/16"	3/16"	Molded	White	57655K62	0000

Gear Cutters

Also known as involute gear cutters, these tools work with a milling machine to create 14½° or 20° pressure angle spur gears. If worn, they can be sharpened and used again.

To select a gear cutter, follow these steps:

1. Determine the pitch of the gear you're cutting. Gear pitch = (No. of Teeth + 2) / OD. Round to the nearest whole number.

2. Select the cutter that matches your gear's pitch and number of teeth.

For 14 1/2° Gear Pressure Angle—Cutters for 14½° Gear Pressure Angle—The former industry standard, these gears are often found in older machinery.

For 20° Gear Pressure Angle—Cutters for 20° Gear Pressure Angle—These gears are the current industry standard and have thicker, stronger teeth than 14½° pressure angle gears.

			Mill
	For Number of Gear Teeth	Gear Cutter Trade No.	Thk.	Dia.	Arbor Hole Dia.	Keyway Wd.	Material	For Use On		Each
For 14 1/2° Gear Pressure Angle







				For 32 Gear Pitch

				135 and Up	1	0.236"	1 3/4"	7/8"	0.125"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	3034A122	000000


				55-134	2	0.236"	1 3/4"	7/8"	0.125"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	3034A222	00000
				26-34	4	0.236"	1 3/4"	7/8"	0.125"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	3034A422	00000
				17-20	6	0.236"	1 3/4"	7/8"	0.125"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	3034A622	00000
				14-16	7	0.236"	1 3/4"	7/8"	0.125"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	3034A723	00000
				12-13	8	0.236"	1 3/4"	7/8"	0.125"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel	3034A822	00000


				For 20° Gear Pressure Angle







								For 32 Gear Pitch

								135 and Up	1	0.125"	2 1/4"	1"	0.25"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Plastic, Stainless Steel, Steel	6376N21	000000


								55-134	2	0.187"	2 1/4"	1"	0.25"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Plastic, Stainless Steel, Steel	6376N22	000000
								35-54	3	0.187"	2 1/4"	1"	0.25"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Plastic, Stainless Steel, Steel	6376N23	000000
								26-34	4	0.187"	2 1/4"	1"	0.25"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Plastic, Stainless Steel, Steel	6376N24	000000
								21-25	5	0.187"	2 1/4"	1"	0.25"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Plastic, Stainless Steel, Steel	6376N25	000000
								17-20	6	0.187"	2 1/4"	1"	0.25"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Plastic, Stainless Steel, Steel	6376N26	000000
								14-16	7	0.187"	2 1/4"	1"	0.25"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Plastic, Stainless Steel, Steel	6376N27	000000
								12-13	8	0.187"	2 1/4"	1"	0.25"	Uncoated High-Speed Steel	Aluminum, Brass, Bronze, Plastic, Stainless Steel, Steel	6376N28	000000