Sprockets for 5/16" Shaft Diameter

Sprocket teeth mesh with your roller chain to smoothly transmit power. These U.S.-made sprockets have machined teeth for a more precise fit than flame-cut or punched teeth, allowing them to glide in and out of the chain to reduce wear and extend chain life.

Steel—Steel is strong, but best for dry environments since moisture will cause it to rust.

Plain Bore—Plain bore sprockets give you options—machine a custom bore, weld, or press-fit them in place. They're sized to the minimum shaft diameter listed and are machinable up to the maximum.

	For Roller Chain
	Trade No.	Std.	Pitch	No. of Teeth	OD	Bore Type	For Shaft Dia.		Each
For Single Strand







				Steel

				25	ANSI	1/4"	11	1"	Plain	1/4" to 5/16"	6793K3	000000

Plastic Sprockets

Quiet-running, lightweight, and naturally rust resistant. Choose these sprockets for noise-sensitive areas, designs with weight constraints, and machines that require frequent washdowns. Their teeth mesh with your roller chain to smoothly transmit power. All are made in the U.S.

	For Roller Chain
	Trade No.	Std.	Pitch	No. of Teeth	OD	Bore Type	For Shaft Dia.		Each
For Single Strand



		25	ANSI	1/4"	11	1"	Plain	1/4" to 5/16"	60425K14	000000


		25	ANSI	1/4"	14	1 1/4"	Plain	5/16" to 1/2"	60425K185	00000
		25	ANSI	1/4"	15	1 5/16"	Plain	5/16" to 1/2"	60425K184	00000
		25	ANSI	1/4"	16	1 7/16"	Plain	5/16" to 1/2"	60425K183	00000
		25	ANSI	1/4"	17	1 1/2"	Plain	5/16" to 1/2"	60425K182	00000

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 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.

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.

Hardened—Gears with hardened teeth have better wear resistance than gears with teeth that are not hardened.

						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







				Steel

				20	12	0.6"	0.7"	1/2"	0.46"	0.44"	Round Bore	5/16"	Not Hardened	1117 Carbon Steel	5172T56	000000




						Brass

						24	48	2"	2.08"	1/4"	0.92"	0.31"	Round Bore	5/16"	—	Brass	7880K45	00000


						14 1/2° Pressure Angle







										Steel

										32	24	3/4"	0.81"	3/16"	0.656"	0.313"	Round Bore	5/16"	Not Hardened	1144 Carbon Steel	6325K96	00000


										24	16	0.666"	0.75"	1/4"	0.547"	0.313"	Round Bore	5/16"	Not Hardened	1144 Carbon Steel	6325K75	00000
										24	20	0.833"	0.92"	1/4"	0.719"	0.313"	Round Bore	5/16"	Not Hardened	1144 Carbon Steel	6325K87	00000
										24	20	0.833"	0.92"	1/4"	0.719"	0.313"	Round Bore with Set Screw	5/16"	Not Hardened	1144 Carbon Steel	6867K19	00000
										20	12	0.6"	0.7"	3/8"	0.469"	0.375"	Round Bore	5/16"	Hardened	1144 Carbon Steel	6325K115	00000
										20	12	0.6"	0.7"	3/8"	0.469"	0.375"	Round Bore	5/16"	Not Hardened	1144 Carbon Steel	6325K81	00000

Gear Racks

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.

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	No. of Mounting Holes		Each
20° Pressure Angle—Rectangular







	Steel

	20	2	0.45"	1/2"	1/2"	Not Hardened	1018 Low-Carbon Steel	—	5174T1	000000


	20	4	0.45"	1/2"	1/2"	Not Hardened	1215 Carbon Steel	—	5174T11	00000
	20	6	0.45"	1/2"	1/2"	Not Hardened	1215 Carbon Steel	—	5174T21	00000




			Brass

			24	2	0.208"	1/4"	1/4"	—	Brass	—	7854K15	000000


			14 1/2° Pressure Angle—Rectangular







							Steel

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


							32	4	0.156"	3/16"	3/16"	Not Hardened	1215 Carbon Steel	—	6295K242	00000
							32	6	0.156"	3/16"	3/16"	Not Hardened	1215 Carbon Steel	—	6295K243	00000
							24	2	0.208"	1/4"	1/4"	Not Hardened	1018 Low-Carbon Steel	—	6295K12	00000
							24	4	0.208"	1/4"	1/4"	Not Hardened	1018 Low-Carbon Steel	12	5170T1	000000
							24	4	0.208"	1/4"	1/4"	Not Hardened	1215 Carbon Steel	—	6295K232	00000
							24	6	0.208"	1/4"	1/4"	Not Hardened	1215 Carbon Steel	—	6295K233	00000
							20	2	0.325"	3/8"	3/8"	Not Hardened	1018 Low-Carbon Steel	—	6295K13	00000
							20	4	0.325"	3/8"	3/8"	Not Hardened	1018 Low-Carbon Steel	12	5170T2	000000
							20	4	0.325"	3/8"	3/8"	Not Hardened	1215 Carbon Steel	—	6295K112	00000
							20	6	0.325"	3/8"	3/8"	Not Hardened	1215 Carbon Steel	—	6295K113	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

	24	72	3"	3.75"	2.95"	1/4"	Brass	2696N3	0000000

Timing Belt Pulleys

Finished Bore

Keep your drive system in sync. Trapezoidal teeth mesh with matching belts to synchronize motion. With the original tooth profile, these pulleys handle enough torque for most applications. If you need high torque or precise starts and stops, consider curved tooth profiles, such as GT and HTD pulleys.

Steel—Strong but best for dry environments since moisture will cause them to rust.

Corrosion-Resistant Aluminum—Won't rust in wet environments and one-third the weight of steel and iron. However, aluminum pulleys are not as strong as iron and steel.

Finished Bore—Mount these pulleys onto the shaft and secure with a set screw—no machining required.

Flush Hub—Ideal in tight spots where a raised hub would get in the way.

	Bore Type	For Shaft Dia.	Pitch Dia.	No. of Flanges	Hub Type		Each
For XL Trade Size







	Steel

	3/8"	0.200"	12	Finished	5/16"	0.764"	2	Standard	6495K746	000000


	3/8"	0.200"	30	Finished	5/16"	1.91"	2	Standard	6495K724	00000
	3/8"	0.200"	32	Finished	5/16"	2.037"	—	Standard	6495K725	00000
	3/8"	0.200"	36	Finished	5/16"	2.292"	—	Standard	6495K726	00000
	3/8"	0.200"	40	Finished	5/16"	2.546"	—	Standard	6495K727	00000
	3/8"	0.200"	42	Finished	5/16"	2.674"	—	Standard	6495K728	00000
	3/8"	0.200"	44	Finished	5/16"	2.801"	—	Standard	6495K729	00000
	3/8"	0.200"	48	Finished	5/16"	3.056"	—	Standard	6495K731	00000




			Corrosion-Resistant Aluminum

			1/4"	0.200"	22	Finished	5/16"	1.401"	2	Standard	1277N22	00000


			1/4"	0.200"	24	Finished	5/16"	1.528"	2	Standard	1277N23	00000
			1/4"	0.200"	26	Finished	5/16"	1.655"	2	Standard	1277N24	00000
			1/4"	0.200"	28	Finished	5/16"	1.783"	2	Standard	1277N25	00000
			3/8"	0.200"	14	Finished	5/16"	0.891"	2	Flush	1277N742	00000
			3/8"	0.200"	15	Finished	5/16"	0.955"	2	Flush	1277N744	00000
			3/8"	0.200"	16	Finished	5/16"	1.019"	2	Flush	1277N746	00000
			3/8"	0.200"	18	Finished	5/16"	1.146"	2	Flush	1277N749	00000
			3/8"	0.200"	20	Finished	5/16"	1.273"	2	Flush	1277N754	00000
			3/8"	0.200"	22	Finished	5/16"	1.401"	2	Flush	1277N759	00000
			3/8"	0.200"	24	Finished	5/16"	1.528"	2	Flush	1277N763	00000


			3/8"	0.200"	30	Finished	5/16"	1.91"	2	Flush	1277N768	00000
			3/8"	0.200"	32	Finished	5/16"	2.037"	—	Standard	1277N55	00000
			3/8"	0.200"	32	Finished	5/16"	2.037"	2	Flush	1277N773	00000
			3/8"	0.200"	36	Finished	5/16"	2.292"	—	Standard	1277N56	00000
			3/8"	0.200"	40	Finished	5/16"	2.546"	—	Standard	1277N57	00000
			3/8"	0.200"	42	Finished	5/16"	2.674"	—	Standard	1277N58	00000
			3/8"	0.200"	44	Finished	5/16"	2.801"	—	Standard	1277N59	00000
			3/8"	0.200"	48	Finished	5/16"	3.056"	—	Standard	1277N6	00000

Precision High-Torque GT Timing Belt Pulleys

Finished Bore

When precise synchronization is crucial, these pulleys minimize play (backlash). They’re often found in 3D printers, where accurate positioning is essential. Their curved teeth fit snugly with matching belts. Compared to pulleys with standard trapezoidal teeth, these pulleys transmit about three times more torque and run at higher speeds. All are compatible with Gates PowerGrip GT, 2GT, GT2, GT3, and GT4 series.

Corrosion-Resistant Aluminum—Won't rust in wet environments and one-third the weight of steel and iron. However, aluminum pulleys are not as strong as iron and steel.

Finished Bore—Mount these pulleys onto the shaft and secure with a set screw—no machining required.

	Bore Type	For Shaft Dia.	Pitch Dia., mm	Hub Type		Each
For 2MGT Trade Size







	Corrosion-Resistant Aluminum

	6	2	100	Finished	5/16"	63.7	Standard	3764N122	000000


	For 3MGT Trade Size







					Corrosion-Resistant Aluminum

					9	3	48	Finished	5/16"	45.8	Standard	3764N142	00000


					9	3	50	Finished	5/16"	47.8	Standard	3764N143	00000
					9	3	56	Finished	5/16"	53.5	Standard	3764N144	00000
					9	3	60	Finished	5/16"	57.3	Standard	3764N145	00000
					9	3	72	Finished	5/16"	68.8	Standard	3764N147	00000
					9	3	80	Finished	5/16"	76.4	Standard	3764N148	00000
					9	3	90	Finished	5/16"	86	Standard	3764N149	00000
					9	3	100	Finished	5/16"	95.5	Standard	3764N15	00000
					9	3	120	Finished	5/16"	114.6	Standard	3764N151	00000

Metal Miter Gears


Gears Sold Separately	Round Bore


For 90° Shaft Angle

With straight, conically shaped teeth and a 1:1 speed ratio, miter gears connect two shafts at an angle without changing shaft speed or torque. They're more efficient than spiral miter gears because they create less friction.

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

1117 Carbon Steel—Carbon steel gears have hard, strong, and wear-resistant teeth. They’re best for heavy duty and high-torque applications, such as lifting equipment. However, these gears will rust when exposed to moisture or corrosive chemicals. Some gears have hardened teeth for additional wear resistance; gears with teeth that are not hardened can be hardened to fit your application.

												Hub
	Gear Pitch	No. of Teeth	For Shaft Angle	Pressure Angle	Gear Pitch Dia.	OD	Face Wd.	Overall Wd.	For Shaft Dia.	Mounting Distance	Tooth Heat Treatment	Dia.	Wd.		Each
Round Bore







				1117 Carbon Steel

				16	12	90°	20°	3/4"	0.84"	0.16"	0.583"	5/16"	0.812"	Not Hardened	0.62"	0.38"	6529K43	000000

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



		24	36	20°	1 1/2"	1.56"	0.21"	0.609"	5/16"	1.188"	Nylon	Molded	White	0.688"	0.313"	7297K17	000000

High-Torque HTD Timing Belt Pulleys

Finished Bore

Curved teeth engage with the matching belt better than standard trapezoidal teeth, so these pulleys transmit about twice the torque. All are compatible with Gates PowerGrip HTD, Omega HP, and Carlisle RPP series.

Corrosion-Resistant Aluminum—Won't rust in wet environments and one-third the weight of steel and iron. However, aluminum pulleys are not as strong as iron and steel.

Finished Bore—Mount these pulleys onto the shaft and secure with a set screw—no machining required.

	Bore Type	For Shaft Dia.	Pitch Dia., mm	Hub Type		Each
For H5M Trade Size







	Corrosion-Resistant Aluminum

	9	5	36	Finished	5/16"	57.3	Standard	6497K275	000000


	9	5	40	Finished	5/16"	63.7	Standard	6497K276	00000

Plastic Timing Belt Pulleys

Naturally rust resistant and lightweight, these plastic pulleys are ideal for machines that require frequent washdowns. Trapezoidal teeth, the original tooth profile, mesh with matching belts to transmit power without slipping.

Finished Bore—Mount these pulleys onto the shaft and secure with a set screw—no machining required.

	Bore Type	For Shaft Dia.	Pitch Dia.	No. of Flanges	Hub Type		Each
For XL Trade Size







	Acetal

	3/8"	0.200"	24	Finished	5/16"	1.528"	2	Standard	57105K22	000000


	3/8"	0.200"	26	Finished	5/16"	1.655"	2	Standard	57105K23	00000
	3/8"	0.200"	28	Finished	5/16"	1.783"	2	Standard	57105K24	00000
	3/8"	0.200"	30	Finished	5/16"	1.91"	2	Standard	57105K25	00000
	3/8"	0.200"	32	Finished	5/16"	2.037"	2	Standard	57105K26	00000
	3/8"	0.200"	36	Finished	5/16"	2.292"	2	Standard	57105K27	00000
	3/8"	0.200"	40	Finished	5/16"	2.546"	2	Standard	57105K28	00000
	3/8"	0.200"	42	Finished	5/16"	2.674"	2	Standard	57105K29	00000
	3/8"	0.200"	44	Finished	5/16"	2.801"	2	Standard	57105K31	00000
	3/8"	0.200"	48	Finished	5/16"	3.056"	2	Standard	57105K32	00000
	3/8"	0.200"	60	Finished	5/16"	3.82"	—	Standard	57105K33	00000

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

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

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

						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	96	3"	3.06"	3/16"	0.813"	0.313"	Round Bore	5/16"	White	2662N19	00000


				24	48	2"	2.08"	1/4"	0.672"	0.313"	Round Bore	5/16"	White	2662N12	0000
				24	60	2 1/2"	2.58"	1/4"	0.672"	0.313"	Round Bore	5/16"	White	2662N13	0000

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.

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

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







	Acetal

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


	24	1	0.203"	1/4"	1/4"	Molded	Gray	2662N52	0000

Light Duty Sleeve Bushings

Reduce the ID of sprockets, pulleys, and gears in low-torque applications. Bushings have a hole for a set screw.

	OD	Overall Wd.	Set Screw Hole Dia.		Each
Steel



	5/16"	1/2"	1 1/8"	3/8"	6420K13	00000

Quick-Grip Screw-Clamp Bushings

Also known as Trantorque bushings, these tighten with a twist of the collar nut—no screws needed. As you tighten the collar nut, the inner sleeve contracts onto the shaft and the outer sleeve expands to hold your sprocket, pulley, or gear.

	OD	Overall Wd.	Max. Torque, in·lbf		Each
Steel



	5/16"	3/4"	7/8"	400	5926K13	000000