AT Series Timing Belt Pulleys

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Belt Trade Size

AT5

AT10

System of Measurement

Metric

For Maximum Belt Width

Number of Teeth

Shaft Diameter

Pitch

Inside Width

Material

Hub Diameter

Width

Tooth Profile

Bore Type

Overall Width

Outside Width

Hub Type

Number of Flanges

Pulley Type

Outer Circle

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

Yes

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

125 Products

Timing Belt Pulleys


Plain 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.

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

	For Max. Belt Wd., mm	Pitch, mm	No. of Teeth	Bore Type	For Shaft Dia., mm	Pitch Dia., mm	No. of Flanges	Hub Type		Each
For AT5 Trade Size







				Corrosion-Resistant Aluminum

				10	5	12	Plain	—	19.3	2	Standard	3709N11	000000


				10	5	15	Plain	—	24.1	2	Standard	3709N13	00000
				10	5	20	Plain	—	32	2	Standard	3709N17	00000
				10	5	22	Plain	—	35.3	2	Standard	3709N18	00000
				10	5	24	Plain	—	38.4	2	Standard	3709N19	00000
				10	5	27	Plain	—	43.2	2	Standard	3709N23	00000
				10	5	30	Plain	8	48	2	Standard	3709N25	00000
				10	5	42	Plain	8	67	2	Standard	3709N29	00000
				10	5	60	Plain	8	95.7	—	Standard	3709N33	00000
				16	5	12	Plain	—	19.3	2	Standard	3709N34	00000
				16	5	18	Plain	—	28.8	2	Standard	3709N38	00000


				16	5	20	Plain	—	32	2	Standard	3709N41	00000
				16	5	22	Plain	—	35.3	2	Standard	3709N42	00000
				16	5	24	Plain	—	38.4	2	Standard	3709N43	00000
				16	5	25	Plain	—	40	2	Standard	3709N44	00000
				16	5	26	Plain	—	41.6	2	Standard	3709N45	00000
				16	5	27	Plain	8	43.2	2	Standard	3709N46	00000
				16	5	28	Plain	8	44.8	2	Standard	3709N47	00000
				16	5	30	Plain	8	48	2	Standard	3709N48	00000
				16	5	32	Plain	8	51.1	2	Standard	3709N49	00000
				16	5	36	Plain	8	57.5	2	Standard	3709N51	00000


				16	5	40	Plain	8	63.9	2	Standard	3709N52	00000
				16	5	42	Plain	8	67	2	Standard	3709N53	00000
				16	5	44	Plain	8	70.2	—	Standard	3709N54	00000
				16	5	60	Plain	8	95.7	—	Standard	3709N56	000000
				25	5	16	Plain	—	25.6	2	Standard	3709N61	00000
				25	5	20	Plain	—	32	2	Standard	3709N64	00000
				25	5	22	Plain	—	35.3	2	Standard	3709N65	00000
				25	5	24	Plain	—	38.4	2	Standard	3709N66	00000
				25	5	25	Plain	—	40	2	Standard	3709N67	00000
				25	5	26	Plain	—	41.6	2	Standard	3709N68	00000


				25	5	27	Plain	8	43.2	2	Standard	3709N69	00000
				25	5	30	Plain	8	48	2	Standard	3709N72	00000
				25	5	32	Plain	8	51.1	2	Standard	3709N73	00000
				25	5	40	Plain	8	63.9	2	Standard	3709N75	00000
				25	5	48	Plain	8	76.6	—	Standard	3709N78	000000


				For AT10 Trade Size







								Corrosion-Resistant Aluminum

16	10							18	Plain	10	57.3	2	Standard	3709N801	00000


16	10							20	Plain	12	63.7	2	Standard	3709N802	00000
16	10	22						Plain	12	70	2	Standard	3709N803	00000
16	10	24	Plain					12	76.4	2	Standard	3709N804	00000
16	10	25	Plain					12	79.6	2	Standard	3709N805	00000
16	10	27	Plain					12	86	2	Standard	3709N806	00000
16	10	30	Plain					12	95.5	2	Standard	3709N807	00000
16	10	32	Plain					12	101.9	2	Standard	3709N808	00000
16	10	36	Plain					16	114.6	2	Standard	3709N809	00000
16	10	40	Plain					16	127.3	2	Standard	3709N811	000000
16	10	44	Plain					16	140.1	2	Standard	3709N812	000000


16	10	48	Plain					16	152.8	—	Standard	3709N813	000000
16	10	60	Plain					16	191	—	Standard	3709N814	000000
25	10	18	Plain					10	57.3	2	Standard	1326N51	00000
25	10	20	Plain					12	63.7	2	Standard	1326N52	00000
25	10	22	Plain					12	70	2	Standard	1326N53	00000
25	10	24	Plain					12	76.4	2	Standard	1326N54	00000
25	10	25	Plain					12	79.6	2	Standard	1326N55	00000
25	10	27	Plain					12	86	2	Standard	1326N56	00000
25	10	30	Plain					12	95.5	2	Standard	1326N57	00000
25	10	32	Plain					12	101.9	2	Standard	1326N58	00000


25	10	36	Plain					16	114.6	2	Standard	1326N59	000000
25	10	40	Plain					16	127.3	2	Standard	1326N61	000000
25	10	44	Plain					16	140.1	2	Standard	1326N62	000000
25	10	48	Plain					16	152.8	—	Standard	1326N63	000000
25	10	60	Plain					16	191	—	Standard	1326N64	000000
50	10	18	Plain					10	57.3	2	Standard	3709N815	00000
50	10	20	Plain					12	63.7	2	Standard	3709N816	00000
50	10	22	Plain					12	70	2	Standard	3709N817	00000
50	10	24	Plain					12	76.4	2	Standard	3709N818	000000
50	10	25	Plain					12	79.6	2	Standard	3709N819	000000


50	10	27	Plain					12	86	2	Standard	3709N821	000000
50	10	30	Plain					12	95.5	2	Standard	3709N822	000000
50	10	32	Plain					12	101.9	2	Standard	3709N823	000000
50	10	36	Plain					16	114.6	2	Standard	3709N824	000000
50	10	40	Plain					16	127.3	2	Standard	3709N825	000000
50	10	44	Plain					16	140.1	2	Standard	3709N826	000000
50	10	48	Plain					16	152.8	—	Standard	3709N827	000000
50	10	60	Plain					16	191	—	Standard	3709N828	000000

Timing Belts

Keep your drive system in sync. Trapezoidal teeth mesh with matching pulleys to transmit power without slipping. With the original tooth profile, these timing belts handle enough torque and synchronization for most applications. If you need high torque or precise starts and stops, consider curved tooth profiles, such as GT and HTD belts.

Abrasion-Resistant Urethane Rubber—Won’t break down or create dust while they run. Plus, they last longer than neoprene belts. Aramid or steel reinforcements provide very high strength and low stretch.

	Wd., mm	Outer Circle, mm	No. of Teeth	Pitch, mm	Reinforcement Material	Temp. Range, ° F	Belt Trade No.		Each
Abrasion-Resistant Urethane Rubber







				AT5 Trade Size

				10	300	60	5	Steel	-20 to 175	10-AT5-300	5863N11	000000


				10	340	68	5	Steel	-20 to 175	10-AT5-340	5863N12	00000
				10	375	75	5	Steel	-20 to 175	10-AT5-375	5863N13	00000
				10	390	78	5	Steel	-20 to 175	10-AT5-390	5863N14	00000
				10	420	84	5	Steel	-20 to 175	10-AT5-420	5863N15	00000
				10	450	90	5	Steel	-20 to 175	10-AT5-450	5863N16	00000
				10	455	91	5	Steel	-20 to 175	10-AT5-455	5863N17	00000
				10	480	96	5	Steel	-20 to 175	10-AT5-480	5863N18	00000
				10	500	100	5	Steel	-20 to 175	10-AT5-500	5863N19	00000
				10	525	105	5	Steel	-20 to 175	10-AT5-525	5863N21	00000
				10	545	109	5	Steel	-20 to 175	10-AT5-545	5863N22	00000


				10	600	120	5	Steel	-20 to 175	10-AT5-600	5863N23	00000
				16	300	60	5	Steel	-20 to 175	16-AT5-300	5863N24	00000
				16	375	75	5	Steel	-20 to 175	16-AT5-375	5863N25	00000
				16	390	78	5	Steel	-20 to 175	16-AT5-390	5863N26	00000
				16	420	84	5	Steel	-20 to 175	16-AT5-420	5863N27	00000
				16	450	90	5	Steel	-20 to 175	16-AT5-450	5863N28	00000
				16	455	91	5	Steel	-20 to 175	16-AT5-455	5863N29	00000
				16	480	96	5	Steel	-20 to 175	16-AT5-480	5863N31	00000
				16	525	105	5	Steel	-20 to 175	16-AT5-525	5863N32	00000
				16	545	109	5	Steel	-20 to 175	16-AT5-545	5863N33	00000


				16	600	120	5	Steel	-20 to 175	16-AT5-600	5863N34	00000
				25	300	60	5	Steel	-20 to 175	25-AT5-300	5863N35	00000
				25	375	75	5	Steel	-20 to 175	25-AT5-375	5863N36	00000
				25	390	78	5	Steel	-20 to 175	25-AT5-390	5863N37	00000
				25	420	84	5	Steel	-20 to 175	25-AT5-420	5863N38	00000
				25	450	90	5	Steel	-20 to 175	25-AT5-450	5863N39	00000
				25	455	91	5	Steel	-20 to 175	25-AT5-455	5863N41	00000
				25	480	96	5	Steel	-20 to 175	25-AT5-480	5863N42	00000
				25	525	105	5	Steel	-20 to 175	25-AT5-525	5863N43	00000
				25	545	109	5	Steel	-20 to 175	25-AT5-545	5863N44	00000


				25	600	120	5	Steel	-20 to 175	25-AT5-600	5863N45	00000




						AT10 Trade Size

						16	500	50	10	Steel	-20 to 175	16-AT10-500	5863N46	00000


						16	560	56	10	Steel	-20 to 175	16-AT10-560	5863N47	00000
						16	660	66	10	Steel	-20 to 175	16-AT10-660	5863N48	00000
						16	700	70	10	Steel	-20 to 175	16-AT10-700	5863N49	00000
						16	780	78	10	Steel	-20 to 175	16-AT10-780	5863N51	00000
						16	800	80	10	Steel	-20 to 175	16-AT10-800	5863N52	00000
						16	840	84	10	Steel	-20 to 175	16-AT10-840	5863N53	00000
16						890	89	10	Steel	-20 to 175	16-AT10-890	5863N54	00000
25	500					50	10	Steel	-20 to 175	25-AT10-500	5863N55	00000
25	560					56	10	Steel	-20 to 175	25-AT10-560	5863N56	00000
25	660					66	10	Steel	-20 to 175	25-AT10-660	5863N57	00000


25	700	70	10			Steel	-20 to 175	25-AT10-700	5863N58	00000
25	780	78	10			Steel	-20 to 175	25-AT10-780	5863N59	00000
25	800	80	10			Steel	-20 to 175	25-AT10-800	5863N61	00000
25	840	84	10			Steel	-20 to 175	25-AT10-840	5863N62	00000
25	890	89	10			Steel	-20 to 175	25-AT10-890	5863N63	00000

Cut-to-Length Timing Belts

Use these timing belts for linear applications or join the ends to create a custom belt. Their trapezoidal teeth mesh with matching pulleys to transmit power without slipping. With the original tooth profile, these timing belts handle enough torque and synchronization for most applications. If you need high torque or precise starts and stops, consider a GT tooth profile.

End Plates—Interlock with belt teeth to clamp them tightly in place without slippage.

	Timing Belts							End Plates
	Wd., mm	Pitch, mm	Reinforcement Material	Temp. Range, ° F	Max. Continuous Lg., ft.		Per Ft.		Each
Abrasion-Resistant Urethane Rubber







				AT10 Trade Size

				25	10	Steel	32 to 176	82	2553K4	000000	2553K82	000000