Timing belt pulleys / profile selectable / with flanged pulley / clamping flange / aluminium

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Back to the Category Toothed Pulleys/Timing Pulleys/Idler Pulleys

Technical Drawing - Toothed Pulleys/Timing Pulleys/Idler Pulleys

Clamping High Torque Timing Pulleys/S3M/S5M/S8M:Related Image

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Available dimensions and tolerances can be found under the tab More Information.

Basic Properties (e.g., material, hardness, coating, tolerance) - Toothed Pulleys/Timing Pulleys/Idler Pulleys

■Recommended Shaft Tolerance h₇ (g₆)
Finish Surface Roughness: Ra = 3.2a or less.

Type	Material		Surface Treatment
	Pulley	Flange
HTCPA	EN AW-7075 Equiv.	Aluminum Alloy 5000 series	Clear Anodize

* Flange is installed.
* Hex socket head cap screws are included. (EN 1.7220 Equiv., Black Oxide)

Further specifications can be found under the tab More Information.

Composition of a Product Code - Toothed Pulleys/Timing Pulleys/Idler Pulleys

Part Number				-	Shaft Bore Dia. d

Type	Number of Teeth	-	Type, Nominal Width
HTCPA40		-	S3M060	-	10

General Information - Toothed Pulleys/Timing Pulleys/Idler Pulleys

Toothed pulley - synchronous pulley - belt pulley - product assortment

Selection details of toothed pulleys/timing pulleys/idler pulleys

- Material: aluminum, steel, stainless steel (stainless steel), plastic

- Coatings: uncoated, burnished, anodized, nickel-plated

- Profile form: 1.5GT, 2GT, 3GT, 5GT, P2M, P3M, P5M, P8M, S2M, S3M, S5M, S8M, S14M, T2.5, T5, T10, AT5, AT10, 5M, 8M, 14M, 8YU, H, L, MXL, XL, PowerGrip GT3: MR2, MR3, MR5

- ISO tolerances: H7

- Belt width (mm): 4, 4.8, 6, 6.4, 7, 7.9, 9, 9.5, 10, 12, 12.7, 15, 18, 19.1, 20, 25, 25.4, 26, 28, 30, 31, 38,1, 40, 50, 50.8, 53, 60, 74, 76.2, 100

- Belt width (inches): 0.19, 0.25, 0.31, 0.37, 0.5, 0.75, 1, 1.5, 2

- Number of teeth: 10 to 72

Description/Basics

The toothed pulley for mechanical engineering is intended for the transmission of force and torque. Timing pulleys enable a gear ratio of speeds through belt pulleys of different sizes. Timing pulleys are more efficient, durable and significantly more maintenance-friendly compared to chain transmissions.

How much torque and load a timing pulley can transmit depends on the width of the belt. The width of the belt must be calculated. It is recommended to ensure the belt is correctly tensioned. MISUMI already offers the suitable idler pulley and return rollers with integrated ball bearings. For design and design help follow this link.

Different profile shapes of the toothed belts and belt pulleys are responsible for the transmission of power. Depending on the positioning accuracy, the applied torque and the conveying weight, MISUMI offers the fitting pulley. Toothed belt drives are generally used in the industry in three areas:
Positioning: Timing pulleys is often used in 3D printers. A toothed pulley with a semi-circular profile (e.g., GT) is often used for the required position accuracy of a 3D printers. The round shape offers the benefit of little play when the direction changes.
Drive: toothed pulleys are also used for high torque. In most cases, a timing pulley with a rounded trapezoidal profile (e.g., S8M) is used. These are particularly well suited for the transmission of high forces, which occur in drives of various applications in order to drive mechanical components.
Conveying: toothed pulleys can also be used for transporting loads. A straight trapezoidal profile is often used for this purpose (e.g., AT). This toothed pulley shape offers a large surface for loading and transmitting of loads.

Which toothed pulley or timing pulley is the right one for your application depends on the respective task of the toothed belt drive. Different toothed disc profiles have proven themselves for each type of application.

Various bore hole shapes and fastening variants are available for shaft mounting. These allow fastening via set screws, keyways and by means of Mecha locks. Fastening via a clamping sleeve has the further advantage that it allows adjusting the alignment continuously. The MISUMI product assortment has these ready-to-install.

Application Examples - Toothed Pulleys/Timing Pulleys/Idler Pulleys

Application example: idler pulley - idler pully toothed with chain tensioner - toothed pulley with chain tensioner

Application example: idler pulley
(1) Idler pulleys, (2) chain tensioner

Application example: return roller - return roller with cantilever pin - synchronous pulley with on-board disc - toothed pulley with on-board disc

Application example: deflection roller
S (1) Toothed pulleys with crimp disc, (2) nut, (3) washer, (4) cantilever shaft, (5) retaining ring

Application example: synchronous pulleys - toothed pulleys with toothed belts - toothed pulley with screw-on clamp

Application example: timing pulleys
(1) Flat head screw, (2) Timing pulley, (3) Timing belt, (4) Screw-on terminal

Application example: toothed belt drives - toothed pulleys with crimp disc - idler pulley with crimp disc - tensioning of the toothed belt

Application example: of toothed belt drives
(1) Toothed belt, (2) driven toothed pulley with crimp disc, (3) idler pulley with crimp disc, (4) driving toothed pulley with crimp disc

Industrial Applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

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Part Number
HTCPA20-S8M150-[12,13,14]
HTCPA20-S8M250-[12,13,14]
HTCPA22-S8M150-[12,13,14,15,16]
HTCPA22-S8M250-[12,13,14,15,16]
HTCPA24-S8M150-[12,13,14,15,16,17,18,19]
HTCPA24-S8M250-[12,13,14,15,16,17,18,19]
HTCPA25-S8M150-[12,13,14,15,16,17,18,19]
HTCPA25-S8M250-[12,13,14,15,16,17,18,19]
HTCPA28-S8M150-[15,16,17,18,19,20,21,22,23,24,25]
HTCPA28-S8M250-[15,16,17,18,19,20,21,22,23,24,25]
HTCPA30-S8M150-[15,16,17,18,19,20,21,22,23,24,25]
HTCPA30-S8M250-[15,16,17,18,19,20,21,22,23,24,25]
HTCPA32-S8M150-[18,19,20,21,22,23,24,25]
HTCPA32-S8M250-[18,19,20,21,22,23,24,25]
HTCPA34-S8M150-[18,19,20,21,22,23,24,25]
HTCPA34-S8M250-[18,19,20,21,22,23,24,25]
HTCPA36-S8M150-[18,19,20,21,22,23,24,25]
HTCPA36-S8M250-[18,19,20,21,22,23,24,25]

Minimum order quantity	Standard Shipping Days ?	RoHS	Belt Type	Belt Width (mm)	[T] Number of Teeth	Shaft Bore Dia. [d] (mm)
1	10 Days	10	S8M	15	20	12 ～ 14
1	10 Days	10	S8M	25	20	12 ～ 14
1	10 Days	10	S8M	15	22	12 ～ 16
1	10 Days	10	S8M	25	22	12 ～ 16
1	10 Days	10	S8M	15	24	12 ～ 19
1	10 Days	10	S8M	25	24	12 ～ 19
1	10 Days	10	S8M	15	25	12 ～ 19
1	10 Days	10	S8M	25	25	12 ～ 19
1	14 Days	10	S8M	15	28	15 ～ 25
1	14 Days	10	S8M	25	28	15 ～ 25
1	14 Days	10	S8M	15	30	15 ～ 25
1	14 Days	10	S8M	25	30	15 ～ 25
1	14 Days	10	S8M	15	32	18 ～ 25
1	14 Days	10	S8M	25	32	18 ～ 25
1	14 Days	10	S8M	15	34	18 ～ 25
1	14 Days	10	S8M	25	34	18 ～ 25
1	14 Days	10	S8M	15	36	18 ～ 25
1	14 Days	10	S8M	25	36	18 ～ 25

Back to the Category Toothed Pulleys/Timing Pulleys/Idler Pulleys

Technical Drawing - Toothed Pulleys/Timing Pulleys/Idler Pulleys

Open the technical drawing in the new window

Specification Tables - Toothed Pulleys/Timing Pulleys/Idler Pulleys

■S3M
■For High Torque Timing Belts, see Here.

Part Number			d Selection								P.D.	O.D.	D	F	E	L	Clamp Screw		Unit Price
Type	Number of Teeth	Type, Nominal Width	d Selection								P.D.	O.D.	D	F	E	L	M	Tightening Torque (N • m)	S3M060	S3M100
HTCPA	24	S3M060 A:7 W:11 S3M100 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	29.80	20	35	25
	36		6	8							34.38	33.62	26	40	28	12.5	3	1.5
	40		8	10							38.20	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	10	11	12					45.84	45.07	33	50	38
	50		8	10	11	12	13	14			47.75	46.98	36	52	40
	60		8	10	11	12	13	14	15	16	57.30	56.53	41	61	46	15.5	5	6

■S5M
■For High Torque Timing Belts, see Here.

Part Number			d Selection										P.D.	O.D.	D	F	E	L	Clamp Screw		Unit Price
Type	Number of Teeth	Type, Nominal Width																	M	Tightening Torque (N • m)	S5M100		S5M150
Type	Number of Teeth	Type, Nominal Width																	M	Tightening Torque (N • m)	d≤19	20≤d	d≤19	20≤d
HTCPA	24	S5M100 A:11 W:16 S5M150 A:17 W:22	8	10									38.20	37.24	26	45	30	12.5	3	1.5		-		-
	25		8	10									39.79	38.83	26	45	30	12.5	3	1.5
	26		8	10									41.38	40.42	31	48	35	14	4	3.5
	28		8	10									44.56	43.60		48	35
	30		10										47.75	46.79		52	36
	32		10	11	12	13	14						50.93	49.97	36	55	40
	34		10	11	12	13	14	15	16				54.11	53.15	41	61	45	15.5	5	6
	36		10	11	12	13	14	15	16				57.30	56.34	41	61	45
	40		10	11	12	13	14	15	16	17	18	19	63.66	62.70	46	67	50
	44		12	13	14	15	16	17	18	19			70.03	69.07	46	74	58	15.5	5	6		-		-
	44		20	21	22	23	24						70.03	69.07	55	74	58	16.5	6	12	-		-
	48		12	13	14	15	16	17	18	19			76.39	75.43	46	83	63	15.5	5	6		-		-
	48		20	21	22	23	24	25					76.39	75.43	55	83	63	16.5	6	12	-		-
	50		12	13	14	15	16	17	18	19			79.58	78.62	46	87	67	15.5	5	6		-		-
	50		20	21	22	23	24	25					79.58	78.62	55	87	67	16.5	6	12	-		-
	60		12	13	14	15	16	17	18	19			95.49	94.53	46	99	80	15.5	5	6		-		-
	60		20	21	22	23	24	25					95.49	94.53	55	99	80	16.5	6	12	-		-

■S8M
■For High Torque Timing Belts, see Here.

Part Number			d Selection								P.D.	O.D.	D	F	E	L	Clamp Screw		Unit Price
Type	Number of Teeth	Type, Nominal Width	d Selection								P.D.	O.D.	D	F	E	L	M	Tightening Torque (N • m)	S8M150	S8M250
HTCPA	20	S8M150 A:17 W:22 S8M250 A:28 W:33	12	13	14						50.93	49.56	36	58	40	14	4	3.5
	22		12	13	14	15	16				56.02	54.65	41	61	45	16	5	6
	24		12	13	14	15	16	17	18	19	61.12	59.74	46	67	50
	25		12	13	14	15	16	17	18	19	63.66	62.29		70	56
	28		15	16	17	18	19				71.30	69.93		80	60
	28		20	21	22	23	24	25			71.30	69.93	55	80	60	17	6	12
	30		15	16	17	18	19				76.39	75.02	46	87	67	16	5	6
	30		20	21	22	23	24	25			76.39	75.02	55			17	6	12
	32		18	19							81.49	80.12	46			16	5	6
	32		20	21	22	23	24	25			81.49	80.12	55			17	6	12
	34		18	19							86.58	85.21	46	95	75	16	5	6
	34		20	21	22	23	24	25			86.58	85.21	55	95	75	17	6	12
	36		18	19							91.67	90.30	46	99	80	16	5	6
	36		20	21	22	23	24	25			91.67	90.30	55	99	80	17	6	12

■Allowable Torque (S3M)

Type	Number of Teeth	Shaft Dia.	Allowable Torque (N • m)
S3M	24 26 28	4	0.16
	30 32	6	0.95
	30 32	8	2.6
	36	6	0.95
	36	8	2.6
	40	8	2.6
	40	10	2.6
	44	8	2.6
	44	10	2.6
	48	8	2.6
		10
		11
		12
	50	8	2.6
		10
		11
		12
		13
		14	7.6
	60	8	2.6
		10
		11
		12
		13
		14	7.6
		15
		16

■Allowable Torque (S5M)

Type	Number of Teeth	Shaft Dia.	Allowable Torque (N • m)
S5M	24 25	8	2.6
	24 25	10	2.6
	26 28	8	2.6
	26 28	10	2.6
	30	10	2.6
	32	10
		11
		12
		13
		14	7.6
	34 36	10	2.6
		11
		12
		13
		14	7.6
		15
		16
	40	10	2.6
		11
		12
		13
		14	7.6
		15
		16
		17
		18
		19
	44 48 50 60	12	2.6
		13	2.6
		14	7.6
		15
		16
		17
		18
		19
		20	48
		21	48
		22	66
		23	66
		24	95
		25	95

■Allowable Torque (S8M)

Type	Number of Teeth	Shaft Dia.	Allowable Torque (N • m)
S8M	20	12	2.6
		13
		14	7.6
	22	12	2.6
		13
		14	7.6
		15
		16
	24 25	12	2.6
		13
		14	7.6
		15
		16
		17
		18
		19
	28 30	15	7.6
		16
		17
		18
		19
		20	48
		21
		22	66
		23
		24	95
		25
	32 34 36	18	7.6
		19
		20	48
		21
		22	66
		23
		24	95
		25

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Basic information

Type	Timing Pulleys	Material	Aluminum Alloy 7000 series	Surface Treatment	Clear Anodize
Timing Pulleys/Idlers	Pulleys

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Basic Attributes

Belt Width(mm)
6

10

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25
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[T] Number of Teeth
20

22

24

25

26

28

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32

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18

19

20

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23

24

25
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Frequently Asked Questions (FAQ)

Question:
Do you have any belt pulleys without a hole?: Answer:
The MISUMI toothed pulleys always have a pilot bore. It is expanded depending on your configuration. It provides the advantage that the belt pulleys are already provided with a suitable shaft bore ready for installation. Therefore, it does not require time-consuming post-processing.
Question:
Do you have timing pulleys made of aluminum?: Answer:
The MISUMI online shop also offers timing pulleys or toothed pulleys in aluminum. Furthermore, we are also offering belt pulleys in steel and stainless steel. The return rollers and idler pulleys for the timing belts are also available in plastic.
Question:
Is a transmission with toothed belt pulleys possible?: Answer:
With toothed pulleys, a gear ratio is possible in a drive. The gear ratio is established based on the number of teeth on the belt pulleys. It should be ensured that the minimum number of teeth of the timing pulley disc is not undercut.
Question:
Which type of the toothed belt pulley can be clamped during assembly?: Answer:
There are a number of ways to install timing pulleys on a shaft. For applications that are not exposed to high torque, such as conveyors, it can be sufficient to fasten a timing pulley using clamping threaded pins. For this purpose, the shaft should have a flat surface.
For higher loads, a toothed pulley with a keyway can also be used.
A further variant is the fastening of a timing pulley via a conical chip sleeve. Depending on the type of Mecha lock, the timing pulley requires lateral internal threads, which can be added through additional options in the MISUMI online shop.
A timing pulley with a bore hole can also be combined with a Mech lock. MISUMI is offering this combination as a set.
Question:
Where do you position the tension roller?: Answer:
If an idler pulley should be utilised, it should be positioned on the sag side. This means that the idler pulley is attached to the side not subjected to pull.
Ideally, a toothed idler pulley is mounted on the inside of the toothed belt. The tensioning roller should always be larger than the smallest toothed idler pulley of the belt drive system.
If an idler pulley must tension the toothed belt from the outside, then a non-toothed (flat) idler pulley should be used. Cantilever pins, which MISUMI offers in various geometric versions, are suitable for fastening.
Question:
Which parallel key can be used for the toothed pulleys?: Answer:
The parallel key size is based on the shaft diameter. In this case, it is recommended using the MISUMI parallel keys, as they fit better when MISUMI toothed pulleys are used. See Overview available as PDF for keyway tolerances.
Question:
Is a timing pulley with a round profile better?: Answer:
Timing pulleys and round-profile timing belts are not recommended for every application. For example, the round profile shape is well suited for applications that require high positioning accuracy. Therefore, they are often used in 3D printers and scanners. Compared to other profile shapes, the round profile shape has a higher wear resistance. Another advantage of the round profile shape is the minimized play in the return (reverse play).
Question:
Which belt pulley is suitable for Gates toothed belts?: Answer:
The GT and EV timing pulleys are suitable for Gates’ toothed belts. However, these require you put attention to the slope (distance of the teeth) of the toothed belt. It must be checked whether these correspond to the selected toothed pulley.
Question:
Are the curtain discs necessary for the toothed pulleys?: Answer:
It is recommended using the smaller belt pulleys particularly with curb disc. The curb disk ensures that the toothed belt does not migrate down from the toothed belt pulley. Even with the smallest misalignment of a pulley, there may be a risk that the toothed belt will move and jump during operation.
Question:
How is the gearing of the toothed pulleys manufactured?: Answer:
The gear teeth of the MISUMI toothed belt pulley are mainly pushed. This ensures high manufacturing accuracy. As a result, the teeth fit precisely into the toothed belt profile of the timing belts and ensure optimal power and torque transmission.