3 mm Pitch Sprockets | McMaster-Carr

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EAR99

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42 Products

Tooth Profile

Curved (HTD)

Transmit about twice as much torque as trapezoidal teeth

16 products

Modified Curved (GT)

Transmit about three times the torque of trapezoidal teeth with more precision

26 products

Performance

Precision

Minimal play (backlash) for when accurate timing is crucial

26 products

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	No. of Flanges	Hub Type		Each
For 3MGT Trade Size







	Corrosion-Resistant Aluminum

	9	3	16	Finished	3/16"	15.3	1	Standard	00000000	000000


	9	3	16	Finished	1/4"	15.3	1	Standard	00000000	00000
	9	3	17	Finished	1/4"	16.2	1	Standard	00000000	00000
	9	3	18	Finished	1/4"	17.2	2	Standard	00000000	00000
	9	3	20	Finished	1/4"	19.1	2	Standard	00000000	00000
	9	3	22	Finished	1/4"	21	2	Standard	00000000	00000
	9	3	24	Finished	1/4"	22.9	2	Standard	0000000	00000
	9	3	25	Finished	1/4"	23.9	2	Standard	00000000	00000
	9	3	26	Finished	1/4"	24.8	2	Standard	00000000	00000
	9	3	28	Finished	1/4"	26.7	2	Standard	00000000	00000
	9	3	30	Finished	1/4"	28.7	2	Standard	00000000	00000


	9	3	32	Finished	1/4"	30.6	2	Standard	00000000	00000
	9	3	34	Finished	1/4"	32.5	2	Standard	00000000	00000
	9	3	36	Finished	1/4"	34.4	2	Standard	00000000	00000
	9	3	40	Finished	1/4"	38.2	2	Standard	00000000	00000
	9	3	44	Finished	1/4"	42	2	Standard	0000000	00000
	9	3	45	Finished	1/4"	43	2	Standard	00000000	00000
	9	3	48	Finished	5/16"	45.8	—	Standard	00000000	00000
	9	3	50	Finished	5/16"	47.8	—	Standard	00000000	00000
	9	3	56	Finished	5/16"	53.5	—	Standard	00000000	00000
	9	3	60	Finished	5/16"	57.3	—	Standard	00000000	00000


	9	3	72	Finished	5/16"	68.8	—	Standard	00000000	00000
	9	3	80	Finished	5/16"	76.4	—	Standard	00000000	00000
	9	3	90	Finished	5/16"	86	—	Standard	00000000	00000
	9	3	100	Finished	5/16"	95.5	—	Standard	0000000	00000
	9	3	120	Finished	5/16"	114.6	—	Standard	00000000	00000

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	No. of Flanges	Hub Type		Each
For H3M Trade Size







	Corrosion-Resistant Aluminum

	6	3	16	Finished	3/16"	15.3	2	Standard	00000000	000000


	6	3	18	Finished	1/4"	17.2	2	Standard	00000000	00000
	6	3	20	Finished	1/4"	19.1	2	Standard	00000000	00000
	6	3	24	Finished	1/4"	22.9	2	Standard	00000000	00000
	6	3	28	Finished	1/4"	26.8	2	Standard	00000000	00000
	6	3	32	Finished	1/4"	30.6	2	Standard	00000000	00000
	6	3	36	Finished	1/4"	34.4	2	Standard	00000000	00000
	6	3	40	Finished	1/4"	38.2	2	Standard	00000000	00000
	9	3	16	Finished	3/16"	15.3	2	Standard	00000000	00000
	9	3	18	Finished	1/4"	17.2	2	Standard	00000000	00000
	9	3	20	Finished	1/4"	19.1	2	Standard	00000000	00000


	9	3	24	Finished	1/4"	22.9	2	Standard	00000000	00000
	9	3	28	Finished	1/4"	26.8	2	Standard	00000000	00000
	9	3	32	Finished	1/4"	30.6	2	Standard	00000000	00000
	9	3	36	Finished	1/4"	34.4	2	Standard	00000000	00000
	9	3	40	Finished	1/4"	38.2	2	Standard	00000000	00000