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iHF Clamp-Type High-Torque Timing Pulleys S3M/HTD3M/S5M/HTD5M/S8M/HTD8M

iHF clamp-type timing pulleys deliver rapid installation, high repeat positioning accuracy, and compact structure – engineered for packaging machinery transmission systems requiring stringent space and precision specifications.

Product features:

High Torque Capacity – Even force distribution across shaft and hub delivers superior torque transmission for high-load, high-speed use.

Backlash-Free Connection – Clamp-type design ensures a rigid, precise fit, preventing misalignment and improving motion control.

Easy Installation – No keyways or set screws required; quick mounting and removal reduce downtime.

Shaft Protection – Frictional clamping avoids surface damage, extending shaft service life.

High Precision – Optimized tooth geometry and tight tolerances guarantee accurate timing and synchronization.

Wide Application Range – Available in multiple profiles, suitable for automation, conveyors, packaging, CNC, textile, and printing industries.

In modern power transmission systems, iHF Clamp-Type High-Torque Timing Pulleys have emerged as a trusted solution for industries that require precision, durability, and high efficiency. Unlike traditional keyed pulleys, clamp-type pulleys use an advanced frictional clamping connection that ensures reliable torque transfer without keyways or set screws. This innovative design not only improves performance but also extends the lifespan of the entire drive system.

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Clamp-Type High-Torque Timing Pulleys S3M

Type			Type D	P.D.	O.D.	D	F	E	L	Tightening Bolt
Category	Number of Teeth	Classification(Nominal Width)	Type D	P.D.	O.D.	D	F	E	L	M	Tightening Torque（(Nm)）
S3M AW	24	S3MC060 ※A:7 ※W:11 S3MC100 ※A:11 *W:15	4	22.92	22.16	13	25	16	9	2	0.4
	26		4	24.83	24.07		28	18
	28		4	26.74	25.98		30	20
	30		6~8	28.65	27.89	20	32	23
	32		6~8	30.56	29.8	20	35	25
	36		6~8	34.38	33.62	26	40	28	12.5	3	1.5
	40		8~10	38.2	37.44	26	44	32	12.5	3	1.5
	44		8~10	42.02	41.25	31	48	36	14	4	3.5
	48		8~12	45.84	45.07	33	50	38
	50		8~14	47.75	46.98	36	52	40
	60		8~16	57.3	56.53	41	61	46	15.5	5	6

Clamp-Type High-Torque Timing Pulleys HTD3M

Type			Type D	P.D.	O.D.	D	F	E	L	Tightening Bolt
Category	Number of Teeth	Classification(Nominal Width)	Type D	P.D.	O.D.	D	F	E	L	M	Tightening Torque（(Nm)）
HTD3M AW	24	3MC060 ※A:7 ※W:11 3MC100 ※A:11 *W:15	4	22.92	22.16	13	25	16	9	2	0.4
	26		4	24.83	24.07		28	18
	28		4	26.74	25.98		30	20
	30		6~8	28.65	27.89	20	32	23
	32		6~8	30.56	29.8	20	35	25
	36		6~8	34.38	33.62	26	40	28	12.5	3	1.5
	40		8~10	38.2	37.44	26	44	32	12.5	3	1.5
	44		8~10	42.02	41.25	31	48	36	14	4	3.5
	48		8~12	45.84	45.07	33	50	38
	50		8~14	47.75	46.98	36	52	40
	60		8~16	57.3	56.53	41	61	46	15.5	5	6

Clamp-Type High-Torque Timing Pulleys S5M

Type			Type D	P.D.	O.D.	D	F	E	L	Tightening Bolt
Category	Number of Teeth	Classification(Nominal Width)								M	Tightening Torque（(Nm)）
S5M AW	24	S5MC100 ※A:11 ※W:16 S5MC150 ※A:17 ※W:22	8~10	38.2	37.24	26	45	30	12.5	3	1.5
	25		8~10	39.79	38.83
	26		8~10	41.38	40.42	31	48	35	14	4	3.5
	28		8~10	44.56	43.6
	30		10	47.75	46.79	31	52	36
	32		10~14	50.93	49.97	36	55	40
	34		10~16	54.11	53.15	41	61	45	15.5	5	6
	36		10~16	57.3	56.34
	40		10~19	63.66	62.7	46	67	50
	44		12~19	70.03	69.07	46	74	58	15.5	5	6
			20~24			55			16.5	6	12
	48		12~19	76.39	75.43	46	83	63	15.5	5	6
			20~25			55			16.5	6	12
	50		12~19	79.58	78.62	46	87	67	15.5	5	6
			20~25			55			16.5	6	12
	60		12~19	95.49	94.53	46	99	80	15.5	5	6
			20~25			55			16.5	6	12

Clamp-Type High-Torque Timing Pulleys HTD5M

Type			Type D	P.D.	O.D.	D	F	E	L	Tightening Bolt
Category	Number of Teeth	Classification(Nominal Width)								M	Tightening Torque（(Nm)）
HTD5M AW	24	5MC100 ※A:11 ※W:16 5MC150 ※A:17 ※W:22	8~10	38.2	37.24	26	45	30	12.5	3	1.5
	25		8~10	39.79	38.83
	26		8~10	41.38	40.42	31	48	35	14	4	3.5
	28		8~10	44.56	43.6
	30		10	47.75	46.79	31	52	36
	32		10~14	50.93	49.97	36	55	40
	34		10~16	54.11	53.15	41	61	45	15.5	5	6
	36		10~16	57.3	56.34
	40		10~19	63.66	62.7	46	67	50
	44		12~19	70.03	69.07	46	74	58	15.5	5	6
			20~24			55			16.5	6	12
	48		12~19	76.39	75.43	46	83	63	15.5	5	6
			20~25			55			16.5	6	12
	50		12~19	79.58	78.62	46	87	67	15.5	5	6
			20~25			55			16.5	6	12
	60		12~19	95.49	94.53	46	99	80	15.5	5	6
			20~25			55			16.5	6	12

Clamp-Type High-Torque Timing Pulleys S8M

Type			Type D	P.D.	O.D.	D	F	E	L	Tightening Bolt
Category	Number of Teeth	Classification(Nominal Width)								M	Tightening Torque（(Nm)）
S8M AW	20	S8MC150 ※A:17 ※W:22 S8MC250 ※A:28 ※W:33	10~14	50.93	49.56	36	58	40	14	4	3.5
	22		10~16	56.02	54.65	41	61	45	16	5	6
	24		12~19	61.12	59.74	46	67	50
	25		12~19	63.66	62.29		70	56
	28		15~19	71.3	69.93	46	80	60	16	5	6
			20~25			55			17	6	12
	30		15~19	76.39	75.02	46	87	67	16	5	6
			20~25			55			17	6	12
	32		18~19	81.49	80.12	46	87	67	16	5	6
			20~25			55			17	6	12
	34		18~19	86.58	85.21	46	95	75	16	5	6
			20~25			55			17	6	12
	36		18~19	91.67	90.3	46	99	80	16	5	6
			20~25			55			17	6	12

Clamp-Type High-Torque Timing Pulleys HTD8M

Type			Type D	P.D.	O.D.	D	F	E	L	Tightening Bolt
Category	Number of Teeth	Classification(Nominal Width)								M	Tightening Torque（(Nm)）
HTD8M AW	20	8MC150 ※A:17 ※W:22 8MC250 ※A:28 ※W:33	10~14	50.93	49.56	36	58	40	14	4	3.5
	22		10~16	56.02	54.65	41	61	45	16	5	6
	24		12~19	61.12	59.74	46	67	50
	25		12~19	63.66	62.29		70	56
	28		15~19	71.3	69.93	46	80	60	16	5	6
			20~25			55			17	6	12
	30		15~19	76.39	75.02	46	87	67	16	5	6
			20~25			55			17	6	12
	32		18~19	81.49	80.12	46	87	67	16	5	6
			20~25			55			17	6	12
	34		18~19	86.58	85.21	46	95	75	16	5	6
			20~25			55			17	6	12
	36		18~19	91.67	90.3	46	99	80	16	5	6
			20~25			55			17	6	12