100 Teeth Sprockets | McMaster-Carr

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Gear

Internal Gear

System of Measurement

Gear Module

Gear Pitch Diameter

Number of Teeth

Face Width

Gear Type

Material

Pressure Angle

Shaft Diameter

Speed Ratio

Bore Type

Overall Width

Gear Pitch

Hub Diameter

Hub Width

Tooth Heat Treatment

REACH

Pitch

For Maximum Belt Width

6 mm

9 mm

RoHS

Compliant

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

Yes

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

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28 Products

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.

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

	OD, mm	ID, mm	Face Wd., mm	Tooth Heat Treatment	Material		Each
20° Pressure Angle







	Steel

	0.5	100	50	70	49	5	Not Hardened	Black-Oxide 1045 Carbon Steel	2696N15	000000


	1	100	100	130	98	10	Not Hardened	Black-Oxide 1045 Carbon Steel	2696N26	000000
	1.5	100	150	190	147	15	Not Hardened	Black-Oxide 1045 Carbon Steel	2696N22	000000
	2	100	200	250	196	20	Not Hardened	Black-Oxide 1045 Carbon Steel	2696N33	000000

Metal Worms and Worm Gears

Worm and

Gear Sold

Separately

Worm gears use screw threads to make large reductions to shaft speed while transmitting motion at a right angle. They transmit motion from worm to gear and cannot be reversed. For gears and worms to mesh correctly, they must have the same pressure angle, pitch/module, number of thread starts, and thread direction. These worms are compatible with plastic worm gears.

Gears

Cast Iron—Cast iron gears are strong and durable.

Speed Ratio—Speed ratio is the ratio by which output shaft speed is reduced. As speed decreases, torque increases.

												Hub
	Gear Module	Gear Pitch	Speed Ratio	No. of Teeth	Pressure Angle	Gear Pitch Dia.	For No. of Thread Starts	OD	Face Wd.	Overall Wd.	For Shaft Dia.	Dia.	Wd.	Material	For Thread Direction	Tooth Heat Treatment	Tooth Mechanical Finish		Each
Round Bore—Cast Iron



		—	10	100:1	100	14 1/2°	10"	1	10.22"	5/8"	1.375"	3/4"	2.5"	0.75"	Cast Iron	Right Hand	Not Hardened	Unfinished	57545K424	0000000


		1	—	100:1	100	20°	100 mm	1	103 mm	10 mm	20 mm	10 mm	40 mm	10 mm	Cast Iron	Right Hand	Not Hardened	Unfinished	57545K785	00000

Metal Ratchet Gears and Pawls

Gears and

Pawls (Sold

Separately)

Gears

Compared to nylon gears, these metal ratchet gears are better for high-load, high-speed, and heavy duty applications. Used to prevent unwanted motion in jacks, tie downs, clutches, and winches, ratchet gears have sloped teeth that allow motion in one direction and prevent it in the other.

Hardened—Gears with hardened teeth are more wear resistant than gears with teeth that are not hardened.

									Hub, mm
	Face Wd., mm	No. of Teeth	OD, mm	For Shaft Dia., mm	Mounting Distance, mm	Material	Tooth Heat Treatment	Overall Wd., mm	Dia.	Wd.		Each
Round Bore



		6	100	66.6	12	44.1	1045 Carbon Steel	Hardened	6	—	—	6283K73	000000


		6	100	66.6	12	44.1	1045 Carbon Steel	Hardened	16	40	10	6283K64	00000
		12	100	100	15	62.2	1045 Carbon Steel	Hardened	12	—	—	6283K65	00000
		12	100	100	15	62.2	1045 Carbon Steel	Hardened	24	50	12	6283K93	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 Bore and Set Screw	20° Pressure Angle, Clamping Bore with Clamping Screw

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

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.

Clamping Bore—Gears with a clamping bore have a built-in clamp that securely grips shafts without marring them. Use the included clamping screw to tighten or loosen the grip.

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







				Steel

				0.5	100	50	51	5	28	7	Round Bore with Set Screw	8	Not Hardened	Black-Oxide 1045 Carbon Steel	2664N333	000000




						Stainless Steel

						1	100	100	102	6	24	14	Clamping Bore with Clamping Screw	10	Not Hardened	303 Stainless Steel	3757N34	000000


						1.5	100	150	153	15	80	14	Round Bore	15	Not Hardened	303 Stainless Steel	2664N505	000000

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.

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.

Hardened—Gear racks with hardened teeth have better wear resistance than racks with teeth that are not hardened.

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







	Steel

	0.5	100	11.5	12	5	Not Hardened	Black-Oxide 1045 Carbon Steel	—	2485N242	000000


	0.5	300	11.5	12	5	Not Hardened	Black-Oxide 1045 Carbon Steel	Machined Ends	2485N241	00000




			Stainless Steel

			1	500	11	12	10	Hardened	304 Stainless Steel	—	2485N232	000000


			1.5	500	18.5	20	15	Hardened	304 Stainless Steel	—	2485N231	000000
			1.5	1,000	18.5	20	15	Hardened	304 Stainless Steel	Machined Ends	2485N229	000000

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.

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

	OD, mm	ID, mm	Face Wd., mm	Tooth Heat Treatment	Finished Material		Each
20° Pressure Angle







	Steel

	0.5	60	30	50	29	5	Not Hardened	Black-Oxide 1045 Carbon Steel	2696N16	000000


	0.5	100	50	70	49	5	Not Hardened	Black-Oxide 1045 Carbon Steel	2696N15	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	100	Finished	5/16"	95.5	Standard	3764N15	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.

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

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







				Nylon

				1	100	100	102	10	40	10	Round Bore	10	Blue	2662N414	000000


				1.5	100	150	153	15	60	10	Round Bore	12	Blue	2662N384	000000

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.

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

Machined—Machined gear racks may be slightly bowed but will straighten out when installed.

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







	Acetal

	1.5	500	18.5	20	15	Machined	White	2662N62	0000000




			Nylon

			1	500	11	12	10	Machined	Blue	2662N67	000000

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.

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., mm	Pitch Dia., mm	Hub Type		Each
For MXL Trade Size







	Corrosion-Resistant Aluminum

	6	0.080"	100	Finished	8	64.7	Standard	1375K166	000000


	9	0.080"	100	Finished	8	64.7	Standard	1375K167	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.

Plain Bore—Do it your way—machine the bore to your exact shaft size or add a set screw or keyway.

	Bore Type	For Shaft Dia., mm	Pitch Dia., mm	No. of Flanges	Hub Type		Each
For MXL Trade Size







	Polycarbonate

	6	0.080"	100	Plain	8	64.7	1	Standard	7717N93	000000