14 mm Pitch Sprockets | McMaster-Carr

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16 Products

Timing Belt Idler Pulleys

Add these free-spinning pulleys to your timing belt setup to minimize vibration and keep belts from wearing out. The needle bearing at the center of these pulleys is lined with small, cylindrical rollers that reduce friction as they rotate. This bearing allows both the pulley and the shaft it’s mounted on to spin independently. Made from iron or steel, these pulleys are strong and wear-resistant. The black oxide coating protects the pulleys from corrosion in dry environments.

Curved teeth have more surface contact with belts than traditional trapezoidal teeth, which allows you to apply more torque without damaging belts. These teeth fit together seamlessly to prevent backlash, or unwanted movement of the belt on the pulley, for a smooth, quiet cycle. They are also known as curvilinear belt pulleys.

For technical drawings and 3-D models, click on a part number.

Metric—Press-Fit Mount

With Two Flanges

With Two Flanges and a Hub

For GT2 Belt Trade Size
For Max. Belt Wd., mm	OD, mm	Number of Teeth	Teeth Shape	Pitch, mm	For Shaft Dia., mm	Dia., mm	Bore Type	Inside Wd., mm	Outside Wd., mm	Overall Wd., mm	Pitch Dia., mm	Number of Flanges	Fabrication	Material	Bearing Type	Hub Dia., mm		Each
37	146	30	Curved	14	40	130.89	Plain	37	52.32	58.67	133.68	2	Machined	Black-Oxide Iron	Needle Roller	111	0000000	0000000

High-Strength HTD Timing Belt Pulleys

These HTD (high torque drive) pulleys have a curved tooth shape that provides higher strength than trapezoidal teeth. Select a pulley with a maximum belt width that’s the same or larger than your timing belt width.

Bushing-mount pulleys grip the shaft more securely than pulleys that press fit. Quick-disconnect (QD) bushings and split-tapered bushings sold separately.

For technical drawings and 3-D models, click on a part number.

Bushing Mount

For 20 mm Max. Belt Wd.
For Belt Trade Size	OD, mm	Number of Teeth	Pitch, mm	ID	Bore Type	For Bushing Style	Inside Wd., mm	Outside Wd., mm	Overall Wd., mm	Pitch Dia., mm	Number of Flanges	Fabrication	Material		Each
R14M	141.23	28	14	2.732"	Finished	Quick Disconnect Style SK	23.07	30.99	30.23	124.765	2	Machined	Black-Oxide Steel	00000000	0000000
R14M	155.71	30	14	2.802"	Finished	Quick Disconnect Style SK	23.07	30.99	30.23	133.680	2	Machined	Black-Oxide Steel	00000000	000000
R14M	155.71	32	14	2.732"	Finished	Quick Disconnect Style SK	23.07	30.99	30.23	142.596	2	Machined	Black-Oxide Steel	00000000	000000

High-Strength GT Timing Belt Pulleys

For higher speed or higher torque applications, these GT series timing belt pulleys provide a more precise fit than HTD pulleys. Use them where accuracy is critical, such as in storage and retrieval systems or in robotics. Similar to HTD timing belt pulleys, their teeth are curved for high strength. The curved teeth create positive grip engagement with timing belts, so these pulleys do not require re-tensioning—unlike drives using V-belts or sheaves. And unlike chain drives, there’s no metal-on-metal contact, so these pulleys don’t require lubrication.

For technical drawings and 3-D models, click on a part number.

Bushing Mount

Without Hub—Two Flanges

For 40 mm Maximum Belt Width
Number of Teeth	Pitch, mm	ID	Bore Type	For Bushing Style	Inside Width, mm	Outside Width, mm	Overall Width, mm	Pitch Diameter, mm	Number of Flanges	Fabrication	Material		Each
28	14	2.75"	Plain	Taper-Lock Style 2012	46.23	54.1	54.1	124.765	2	Machined	Black-Oxide Iron	00000000	0000000
46	14	3.375"	Plain	Taper-Lock Style 2517	46.23	54.1	54.1	204.978	2	Machined	Black-Oxide Iron	00000000	000000
72	14	4.25"	Plain	Taper-Lock Style 3020	46.23	54.1	54.1	320.853	2	Cast, Machined	Black-Oxide Iron	00000000	000000

Ultra-High-Strength Poly Chain Timing Belt Pulleys

Curved teeth with a high pitch provide superior load distribution and reduce wear. They mount with a bushing for a more secure grip on the shaft than set screws. Bushing is not included. Select a pulley with a maximum belt width that’s the same or larger than your timing belt width.

For technical drawings and 3-D models, click on a part number.

Bushing Mount

For 20 mm Max. Belt Wd.
OD, mm	Number of Teeth	Pitch, mm	ID	Bore Type	For Bushing Style	Inside Wd., mm	Outside Wd., mm	Overall Wd., mm	Pitch Dia., mm	Number of Flanges	Fabrication	Material		Each
141.28	28	14	2.75"	Finished	Taper-Lock Style 2012	27.67	34.54	34.54	124.765	2	Cast	Black-Oxide Iron	00000000	0000000
190.96	40	14	3.375"	Finished	Taper-Lock Style 2517	27.67	34.54	44.45	178.26	2	Cast	Black-Oxide Iron	00000000	000000
281.1	60	14	5"	Finished	Taper- Lock Style 3525	27.67	34.54	63.5	267.39	2	Cast	Black-Oxide Iron	00000000	000000
For 37 mm Max. Belt Wd.
141.28	28	14	2.75"	Finished	Taper-Lock Style 2012	42.93	50.8	50.8	124.765	2	Cast	Black-Oxide Iron	00000000	000000
190.96	40	14	4.25"	Finished	Taper-Lock Style 3020	44.45	52.32	52.4	178.26	2	Cast	Black-Oxide Iron	00000000	000000
281.1	60	14	5"	Finished	Taper- Lock Style 3525	44.45	52.32	63.5	267.39	2	Cast	Black-Oxide Iron	00000000	000000
For 68 mm Max. Belt Wd.
141.28	29	14	3.375"	Finished	Taper-Lock Style 2517	76.45	84.58	84.58	129.235	2	Cast	Black-Oxide Iron	00000000	000000
190.96	40	14	4.25"	Finished	Taper-Lock Style 3020	76.45	84.58	84.58	178.26	2	Cast	Black-Oxide Iron	00000000	000000
281.1	60	14	5"	Finished	Taper- Lock Style 3525	76.45	84.58	84.58	267.39	2	Cast	Black-Oxide Iron	00000000	000000