H3M Timing Belts | McMaster-Carr

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30 Products

High-Torque HTD Timing Belts

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

Neoprene—Durable and weather resistant, but lose elasticity if exposed to oil and fuel. These belts are reinforced, so they're strong enough to transmit power without stretching. Plus, nylon-coated teeth minimize friction and protect the surface from wear.

	Pitch, mm	Reinforcement Material	Tooth Finish	Temp. Range, ° F		Each
Neoprene







	H3M Trade Size

	6	111	37	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K511	000000


	6	129	43	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K514	00000
	6	159	53	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K517	00000
	6	183	61	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K521	00000
	6	276	92	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K524	00000
	9	111	37	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K512	00000
	9	129	43	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K515	00000
	9	159	53	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K518	00000
	9	183	61	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K522	00000
	9	276	92	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K525	00000
	15	111	37	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K513	00000


	15	159	53	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K519	00000
	15	183	61	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K523	00000
	15	276	92	3	Fiberglass, Aramid	Nylon Coated	-20 to 212	7939K526	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	6497K251	000000


	6	3	18	Finished	1/4"	17.2	2	Standard	6497K252	00000
	6	3	20	Finished	1/4"	19.1	2	Standard	6497K253	00000
	6	3	24	Finished	1/4"	22.9	2	Standard	6497K254	00000
	6	3	28	Finished	1/4"	26.8	2	Standard	6497K255	00000
	6	3	32	Finished	1/4"	30.6	2	Standard	6497K256	00000
	6	3	36	Finished	1/4"	34.4	2	Standard	6497K257	00000
	6	3	40	Finished	1/4"	38.2	2	Standard	6497K258	00000
	9	3	16	Finished	3/16"	15.3	2	Standard	6497K259	00000
	9	3	18	Finished	1/4"	17.2	2	Standard	6497K261	00000
	9	3	20	Finished	1/4"	19.1	2	Standard	6497K262	00000


	9	3	24	Finished	1/4"	22.9	2	Standard	6497K263	00000
	9	3	28	Finished	1/4"	26.8	2	Standard	6497K264	00000
	9	3	32	Finished	1/4"	30.6	2	Standard	6497K265	00000
	9	3	36	Finished	1/4"	34.4	2	Standard	6497K266	00000
	9	3	40	Finished	1/4"	38.2	2	Standard	6497K267	00000