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Part Number Complete

E-HTPL40S8M250-F-[20,22,24,25,28,30,32,35]

Belt Width Used Pulley Shape Material Surface Treatment Number of Teeth Shaft Bore Dia. [d] type CAD Days to Ship

Specification/Dimensions

Belt Width Used(mm)
15

25

30

40
Clear
Pulley Shape
- Shape E
- Shape F
Clear
Material
- Steel
  - S45C Equivalent
- Aluminum
  - Aluminum Alloy
Clear
Surface Treatment
- Black Oxide Coating
- Clear Anodize
- Electroless Nickel Plating
Clear
Number of Teeth
18

19

20

21

22

24

25

26

28

30

32

34

36

38

40

44

48

50

60
Clear
Shaft Bore Dia. [d](mm)
12

14

15

16

17

18

19

20

22

24

25

28

30

32

35

38

40

42

45

48

50
Clear
type
- E-HTLA□□S8M
- E-HTLG□□S8M
- E-HTPL□□S8M
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

9 Day(s) or Less
Clear

Specify Alterations

Timing Pulleys Keyless/High Torque/S8M (Part Number)

Name: Timing Pulleys Keyless/High Torque/S8M
Brand: MISUMI
Availability: PreOrder

Brand :

MISUMI

MiSUMi Economy

MISUMI

Part Number :

E-HTPL40S8M250-F-[20,22,24,25,28,30,32,35]

E-HTPL40S8M300-E-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL40S8M300-F-[20,22,24,25,28,30,32,35]

E-HTPL40S8M400-E-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL40S8M400-F-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL44S8M150-E-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL44S8M250-E-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL44S8M250-F-[20,22,24,25,28,30,32,35]

E-HTPL44S8M300-E-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL44S8M300-F-[20,22,24,25,28,30,32,35]

E-HTPL44S8M400-E-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL44S8M400-F-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL48S8M150-E-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL48S8M250-E-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL48S8M250-F-[20,22,24,25,28,30,32,35]

E-HTPL48S8M300-E-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL48S8M300-F-[20,22,24,25,28,30,32,35]

E-HTPL48S8M400-E-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL48S8M400-F-[20,22,24,25,28,30,32,35,38,40,42]

E-HTPL50S8M150-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]

E-HTPL40S8M250-F-[20,22,24,25,28,30,32,35]

Order Qty :
Price :

---
Total Price :

---
Days to ship :

---

Select part number to Order Now/ Add to Cart

CAD Download

Product Overview

Usually, timing pulleys and timing belts are widely used to design mechanisms for transmitting rotational power generated by motors.
Driving and transmission are realized through the engagement between the teeth of timing pulleys and timing belts.

Dimensional Drawing

MISUMI Keyless Timing Pulley S8M Specifications Drawing

The shaft bore may not have surface treatment.

Bushings are available in Standard Type (ST Bushing) and Short Type (SH Bushing). Refer to Detailed Specifications of Bushings

Specifications Overview

Part Number				Material			Surface Treatment
Belt Width 15mm	Belt Width 25mm	Belt Width 30mm	Belt Width 40mm	Pulley	Flange	Bushing	Pulley	Flange	Bushing
A: 17 W: 22	A: 28 W: 33	A: 33 W: 38	A: 44 W: 49
E-HTLA□□S8M150	E-HTLA□□S8M250	E-HTLA□□S8M300	E-HTLA□□S8M400	Aluminum Alloy 7A09	Aluminum Alloy	Equivalent to S45C	Clear Anodized		-
E-HTPL□□S8M150	E-HTPL□□S8M250	E-HTPL□□S8M300	E-HTPL□□S8M400	Equivalent to S45C	SPCC	Equivalent to S45C	Ferroferric Oxide Protective Film
E-HTLG□□S8M150	E-HTLG□□S8M250	E-HTLG□□S8M300	E-HTLG□□S8M400				Electroless Nickel Plating

Film hardness of hard clear anodize is 300HV~.

If there are requirements for rust prevention, give priority to products with surface treatment of electroless nickel plating on other pages.

Specification Table

Part Number			Pulley Shape	d_H7 range (select Shaft Bore Dia. according to Table 1)								P.D.	O.D.	F	E
Part Number				S8M150		S8M250		S8M300		S8M400
Type	Number of Teeth	Type & Nominal Width		Shape E (ST Bushing)	Shape F (SH Bushing)	Shape E (ST Bushing)	Shape F (ST Bushing) (SH Bushing)	Shape E (ST Bushing)	Shape F (ST Bushing) (SH Bushing)	Shape E (ST Bushing)	Shape F (ST Bushing)
E-HTLA E-HTPL E-HTLG	18	S8M150 ＊A：17 ＊W：22 S8M250 ＊A：28 ＊W：33 S8M300 ＊A：33 ＊W：38 S8M400 ＊A：44 ＊W：49	E F	12	-	12	12	-	-	-	-	45.84	44.46	52	36
	19			12・14・15	12	12・14・15	12・14・15	15	15	-	-	48.38	47.01	55	40
	20			12~17	12	12~17	12・14・15	15・16・17	15	-	-	50.93	49.56	58	40
	21			12~17	12	12~17	12~17	15・16・17	15・16・17	16・17	16・17	53.48	52.1	61	45
	22			12~17	12	12~17	12~17	15・16・17	15・16・17	16・17	16・17	56.02	54.65	61	45
	24			12~17	12	12~17	12~17	15・16・17	15・16・17	16・17	16・17	61.12	59.74	67	50
	25			12~25	12	12~25	12~25	15~25	15~25	16~25	16~25	63.66	62.29	70	56
	26			14~25	-	14~25	14~25	15~25	15~25	16~25	16~25	66.21	64.84	74	58
	28			14~25		14~25	14~25	15~25	15~25	16~25	16~25	71.3	69.93	80	60
	30			14~32		14~32	14~32	15~32	15~32	16~32	16~32	76.39	75.02	87	67
	32			14~32		14~32	14~32	15~32	15~32	16~32	16~32	81.49	80.12	87	67
	34			16~35		16~35	16~35	16~35	16~35	16~35	16~35	86.58	85.21	95	75
	36			16~38		16~38	16~35	16~38	16~35	16~38	16~38	91.67	90.3	99	80
	38			16~42		16~42	16~35	16~42	16~35	16~42	16~42	96.77	95.39	104	84
	40			20~42		20~42	20~35	20~42	20~35	20~42	20~42	101.86	100.49	111	90
	44			20~42		20~42	20~35	20~42	20~35	20~42	20~42	112.05	110.67	119	100
	48			20~42		20~42	20~35	20~42	20~35	20~42	20~42	122.23	120.86	127	105
	50			20~50	-	20~50	20~35	20~50	20~35	20~50	20~42	127.32	125.95	135	115
	60			20~50	-	20~50	20~35	20~50	20~35	20~50	20~42	152.79	151.42	160	140

Select Shaft Bore Dia. according to Table 1

■Table 1: Shaft Bore Dia. Selection

d_H7	Allowable max. torque N・m		D		(L)
d_H7	ST Bushing	SH Bushing	ST Bushing	SH Bushing	(L)
12	48	23	32	31	10.5
14	73	-	35	-	12
15	78		36		12
16	83		37		13
17	88		38		13
18	154		43		14
19	163		45
20	171		46
22	186		48
24	206		50
25	216		52
28	353		54		15.5
30	382		57		15.5
32	412	163	59	58	16.5
35	451	173	63	61	16.5
38	686	-	70	-	19
40	725		71		19
42	757		74		20
45	1490		84		24.5
48	1600		87
50	1660		89

Using a bushing with electroless nickel plated surface reduces maximum allowable torque and axial load by 20%-30%.

Product Features

Features of MISUMI Keyless Timing Pulleys
Feature 1: Keyless timing pulleys require no keyway machining, and round shaft and round hole can be used directly.
Urgent design changes can be made due to the reduction of cutting and machining time.

MISUMI keyless timing pulleys can accommodate urgent design changes

Feature 2: Keyless timing pulleys are connected with bolts only, allowing for easy installation and removal.
Equipment maintenance can be easily carried out without using a special tool. Parts are reusable, effectively reducing the cost.
MISUMI keyless timing pulleys are easy to install and remove

MISUMI keyless timing pulleys are easy to install and remove

Feature 3: Keyless timing pulleys enable free alignment at any position during assembly.
Alignment control is possible during assembly, thus eliminating the need to align the key and tooth in the design phase.
Keyless timing pulleys, free alignment

Feature 4: Keyless timing pulleys have no loosening. When a key is used, the keyway becomes loose, but there is no gap in the keyless bushing. It is therefore suitable for places where there are repeated forward and reverse rotations.
Long-term high coaxiality connection can be achieved. Suitable for servo motors and other places where there are repeated forward and reverse rotations.
Keyless timing pulleys, no loosening

Usage Method

■Mounting method for keyless timing pulleys
①Wipe off the stains on the shaft surface and apply a layer of lubricant or grease. (Do not use any lubricant or grease that contains molybdenum abrasion inhibiting agent.)
②Also wipe the contact surface between the timing pulley and the bushing, and apply lubricant or grease. In addition, the fastening bolt thread surface and bearing surface must be applied lubricant or grease.
③Insert the timing pulley and bushing into the shaft after temporary assembly. (Do not tighten the bushing directly with the bolt without putting it through the shaft.)
④After positioning is completed, tighten the bolts gently (about 1/4 of the specified tightening torque) and diagonally in sequence with a torque wrench.
⑤Tighten with increased tightening torque (about 1/2 of the specified tightening torque).
⑥Tighten again to the specified tightening torque.
⑦Tighten the fastening bolt circumferentially in sequence.

■Disassembly method for keyless timing pulleys
①Work with the unit at a complete stop.
②Loose the fastening bolt circumferentially in sequence
③Insert the bolt into the threaded hole for disassembly and evenly screw it in.
④When reinstalling, repeat the steps in “Installation”.

Precautions

① If there are requirements for rust prevention, give priority to products with surface treatment of electroless nickel plating on other pages.
Please refer to

surface treatment and rust prevention methods
② When installing a keyless bushing, be sure to apply lubricant or grease to the shaft surface, the contact surface between the pulley and the bushing, and the fastening bolt.
Otherwise it will not be securely tightened and may cause the shaft to idle.
③ Tighten the bolt after inserting the bushing into the shaft. (If the bolts is tightened before inserting the bushing, it will cause deformation of the bushing.)
④ Use a torque spanner to tighten the bolts.
⑤ Do not use bolts other than those supplied.

Example of Use

■Mechanism name
Dustproof Lifting Machine

■Mechanism function
Lifting machine for heavy workpieces
Use in dusty places

■Function of Keyless Timing Pulleys
Rotates ball screws by means of a keyless toothed timing belt, lifting and lowering the positioning stage

For details, please click Dustproof Lifting Machine

Application Industries

Smart Phones	Medical	Electronic & Electrical

Automotive	Robotics	Lithium battery

Part Number

Incomplete part number.
Please use left hand selections to complete a part number.

: 30; 60; 90

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Part Number
E-HTPL40S8M250-F-[20,22,24,25,28,30,32,35]
E-HTPL40S8M300-E-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL40S8M300-F-[20,22,24,25,28,30,32,35]
E-HTPL40S8M400-E-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL40S8M400-F-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL44S8M150-E-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL44S8M250-E-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL44S8M250-F-[20,22,24,25,28,30,32,35]
E-HTPL44S8M300-E-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL44S8M300-F-[20,22,24,25,28,30,32,35]
E-HTPL44S8M400-E-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL44S8M400-F-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL48S8M150-E-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL48S8M250-E-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL48S8M250-F-[20,22,24,25,28,30,32,35]
E-HTPL48S8M300-E-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL48S8M300-F-[20,22,24,25,28,30,32,35]
E-HTPL48S8M400-E-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL48S8M400-F-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL50S8M150-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
E-HTPL50S8M250-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
E-HTPL50S8M250-F-[20,22,24,25,28,30,32,35]
E-HTPL50S8M300-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
E-HTPL50S8M300-F-[20,22,24,25,28,30,32,35]
E-HTPL50S8M400-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
E-HTPL50S8M400-F-[20,22,24,25,28,30,32,35,38,40,42]
E-HTPL60S8M150-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
E-HTPL60S8M250-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
E-HTPL60S8M250-F-[20,22,24,25,28,30,32,35]
E-HTPL60S8M300-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
E-HTPL60S8M300-F-[20,22,24,25,28,30,32,35]
E-HTPL60S8M400-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
E-HTPL60S8M400-F-[20,22,24,25,28,30,32,35,38,40,42]

Price	Minimum Order Qty.	Days to Ship	RoHS	Belt Width Used (mm)	Pulley Shape	Material	Surface Treatment	Number of Teeth	Shaft Bore Dia. [d] (mm)
-	1 Piece(s)	9 Day(s)	10	25	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	40	20 ～ 35
-	1 Piece(s)	9 Day(s)	10	30	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	40	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	30	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	40	20 ～ 35
-	1 Piece(s)	9 Day(s)	10	40	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	40	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	40	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	40	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	15	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	44	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	25	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	44	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	25	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	44	20 ～ 35
-	1 Piece(s)	9 Day(s)	10	30	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	44	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	30	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	44	20 ～ 35
-	1 Piece(s)	9 Day(s)	10	40	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	44	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	40	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	44	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	15	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	48	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	25	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	48	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	25	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	48	20 ～ 35
-	1 Piece(s)	9 Day(s)	10	30	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	48	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	30	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	48	20 ～ 35
-	1 Piece(s)	9 Day(s)	10	40	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	48	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	40	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	48	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	15	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	50	20 ～ 50
-	1 Piece(s)	9 Day(s)	10	25	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	50	20 ～ 50
-	1 Piece(s)	9 Day(s)	10	25	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	50	20 ～ 35
-	1 Piece(s)	9 Day(s)	10	30	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	50	20 ～ 50
-	1 Piece(s)	9 Day(s)	10	30	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	50	20 ～ 35
-	1 Piece(s)	9 Day(s)	10	40	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	50	20 ～ 50
-	1 Piece(s)	9 Day(s)	10	40	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	50	20 ～ 42
-	1 Piece(s)	9 Day(s)	10	15	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	60	20 ～ 50
-	1 Piece(s)	9 Day(s)	10	25	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	60	20 ～ 50
-	1 Piece(s)	9 Day(s)	10	25	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	60	20 ～ 35
-	1 Piece(s)	9 Day(s)	10	30	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	60	20 ～ 50
-	1 Piece(s)	9 Day(s)	10	30	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	60	20 ～ 35
-	1 Piece(s)	9 Day(s)	10	40	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	60	20 ～ 50
-	1 Piece(s)	9 Day(s)	10	40	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	60	20 ～ 42

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Basic Information

Type	Keyless Bushings	Belt Type	S8M

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Flat-belt idlers, Width (T), 6 to 32 mm	Flat Belts For General Use	High Torque Timing Pulleys S2M Type

Representative model: HBG15-6	Representative model: HBLT350-4.23	Representative model: HTPA48S2M040-B-N10
Advantages: short delivery time, multiple types	Advantage: custom size	Advantages: short delivery time, multiple types

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