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Keyless High Torque Timing Pulleys - S8M (Part Numbers)

[Material]
· Pulley: Extra super duralumin aluminum alloy, S45C equivalent
· Flange: Aluminum alloy, SPCC
· Bushing: S45C equivalent
[Surface treatment]
· Clear anodize, hard clear anodize (firm hardness 300HV~), electroless nickel plating, black oxide

(i)Caution

Regarding RoHS compliance: The products are RoHS non-compliant only when alteration BMC is selected. The products are RoHS-compliant when BMC is not selected. As some parts used in the alteration are RoHS non-compliant, the RoHS notation on this page has been changed to non-compliant. "Non-compliant" is also indicated in the certificate due to information on the left.
Please note that the swaged flange options, NFC, RFC, and LFC, are not reflected in the CAD data.

Part Number

Configured Part Number is shown.

■S8M

● Pulley Shape

Shape E

Shape F

Standard Tooth Profile

Tooth groove dimensions slightly vary according to the number of teeth. (Pitch: 8.0mm)

[ ! ] Surface treatment may not be applied to the shaft bores.
[!] Two types of bushings are available: standard type (ST bushings) and short type (SH bushings).
[ ! ] Machined flange for 72 toothed pulleys.
[ ! ] Unless otherwise specified except for teeth and F dimensions, the dimension tolerance conforms to JIS B 0405 Class m.

Table 1: Select Shaft Bore Dia.

d_H7	Max. allowable 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

[ ! ] Electroless nickel plated bushing (alterations BMC, BMR) decreases maximum allowable torque and allowable thrust load by 20 to 30%.

■Belt Nominal Width / Dimensions

mm	Nominal
mm	S8M150	S8M250	S8M300	S8M400
A	17	28	33	44
W	22	33	38	49

Type	Part number				[M]Material^*1			[S] Surface Treatment
	Belt width: 15 mm	Belt width: 25 mm	Belt width: 30 mm	Belt width: 40 mm	Pulley	Flange	Bushing	Pulley	Flange	Bushing
	S8M150	S8M250	S8M300	S8M400
HTLA	●	●	●	●	Extra Super Duralumin Aluminum alloy	Aluminum alloy	S45C Equivalent	Clear Anodize		—
HTLK	●	●	●	●				Hard Clear Anodized ^*2		—
HTPL	●	●	●	●	S45C equivalent	SPCC	S45C Equivalent	Black Oxide Coating
HTLG	●	●	●	●				Electroless nickel plating

*1The above materials and accessories might be changed to the ones equivalent to the originals. *2 Hard clear anodize: film hardness 300 HV or more

Specification Table

Part number	—	Pulley Shape	—	Shaft Bore Dia.
HTPL 60S8M300	—	E	—	40

Part number			Pulley Shape	d_H7 range 1 mm increments								P.D	O.D	F	E
				Shape E				Shape F
Type	Number of Teeth	Type Nominal Width		S8M150	S8M250	S8M300	S8M400	S8M150	S8M250	S8M300	S8M400
				ST Bushing	ST Bushing	ST Bushing	ST Bushing	SH Bushing	ST Bushing: 12-30 SH Bushing: 32,35	ST Bushing: 15-32 SH Bushing: 35	ST Bushing
HTLA HTLK HTPL HTLG	18	S8M150 S8M250 S8M300 S8M400	E F	12	12	—	—	—	12	—	—	45.84	44.46	52	36
	19			12,14,15	12,14,15	15	—	12	12,14,15	15	—	48.38	47.01	55	40
	20			12,14-17	12,14-17	15-17	—	12	12,14,15	15	—	50.93	49.56	58	49
	21			12,14-17	12,14-17	15-17	16,17	12	12,14-17	15-17	16,17	53.48	52.10	61	45
	22											56.02	54.65
	23											58.57	57.20	67	50
	24											61.12	59.74
	25			12,14-20,22,24,25		15-20,22,24,25	16-20,22,24,25	12	12,14-20,22,24,25	15-20,22,24,25	16-20,22,24,25	63.66	62.29	70	56
	26			14-20,22,24,25	14-20,22,24,25	15-20,22,24,25	16-20,22,24,25	—	14-20,22,24,25	15-20,22,24,25	16-20,22,24,25	66.21	64.84	74	58
	27											68.75	67.38	80	60
	28											71.30	69.93
	29											73.85	72.48
	30			14-20,22,24,25,28,30,32	14-20,22,24,25,28,30,32	15-20,22,24,25,28,30,32	16-20,22,24,25,28,30,32	—	14-20,22,24,25,28,30,32	15-20,22,24,25,28,30,32	16-20,22,24,25,28,30,32	76.39	75.02	87	67
	31											78.94	77.57
	32											81.49	80.12
	33											84.03	82.66
	34			16-20,22,24,25,28,30,32,35				—	16-20,22,24,25,28,30,32,35	16-20,22,24,25,28,30,32,35	16-20,22,24,25,28,30,32,35	86.58	85.21	95	75
	35											89.13	87.75
	36			16-20,22,24,25,28,30,32,35,38				—			16-20,22,24,25,28,30,32,35,38	91.67	90.30	99	80
	37											94.22	92.85
	38			16-20,22,24,25,28,30,32,35,38,40,42				—			16-20,22,24,25,28,30,32,35,38,40,42	96.77	95.39	104	84
	39											99.31	97.94	111	90
	40			20,22,24,25,28,30,32,35,38,40,42				—	20,22,24,25,28,30,32,35	20,22,24,25,28,30,32,35	20,22,24,25,28,30,32,35,38,40,42	101.86	100.49
	41											104.41	103.03
	42											106.95	105.58
	43											109.50	108.13	119	100
	44											112.05	110.67
	45											114.59	113.22	123	102
	46											117.14	115.77
	47											119.68	118.31	127	105
	48											122.23	120.86
	49											124.78	123.41	135	115
	50			20,22,24,25,28,30,32,35,38,40,42,45,48,50				—	20,22,24,25,28,30,32,35	20,22,24,25,28,30,32,35	20,22,24,25,28,30,32,35,38,40,42	127.32	125.95
	51											129.87	128.50
	52											132.42	131.04	140	120
	53											134.96	133.59
	54											137.51	136.14	144	125
	55											140.06	138.68
	56											142.60	141.23	152	130
	57											145.15	143.78
	58											147.70	146.32	160	140
	59											150.24	148.87
	60											152.79	151.42
	72			20,22,24,25,28,30,32,35,38,40,42,45,48,50				—	20,22,24,25,28,30,32,35		20,22,24,25,28,30,32,35,38,40,42,45,48,50	183.35	181.97	190	170

Alterations

Part number	—	Pulley Shape	—	Shaft Bore Dia.	—	(BMC, etc.)
HTLA25S8M250	—	F	—	25	—	FC65

Alterations	Surface Treatment	Flange Cut	No Flange	Single Flange
Code	BMC·BMR	FC	NFC	LFC·RFC
Spec.	Applies electroless nickel plating on a bushing. (Antirusting treatment is applied to screws.) [ ! ] Electroless nickel plating decreases bushing's allowable torque by 20 to 30%. BMC: Not RoHS Compliant (Screw: SCM435 Dacrotized Treatment) BMR: RoHS Compliant (Screw: SCM435 GeoMet Coating)

Part Number

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Part Number
HTPL60S8M250-F-[20,22,24,25,28,30,32,35]
HTPL60S8M300-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
HTPL60S8M300-F-[20,22,24,25,28,30,32,35]
HTPL60S8M400-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
HTPL60S8M400-F-[20,22,24,25,28,30,32,35,38,40,42]
HTPL72S8M150-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
HTPL72S8M250-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
HTPL72S8M250-F-[20,22,24,25,28,30,32,35]
HTPL72S8M300-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
HTPL72S8M300-F-[20,22,24,25,28,30,32,35]
HTPL72S8M400-E-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]
HTPL72S8M400-F-[20,22,24,25,28,30,32,35,38,40,42,45,48,50]

Standard Unit Price	Minimum order quantity	Days to Ship	RoHS	Belt Width Used (mm)	No. of Teeth (T)	Pulley Shape	Material	Surface Treatment	Shaft Bore Dia. [d] (mm)
-	1 Piece(s)	7 Day(s) or more	10	25	60	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 35
-	1 Piece(s)	7 Day(s) or more	10	30	60	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 50
-	1 Piece(s)	7 Day(s) or more	10	30	60	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 35
-	1 Piece(s)	7 Day(s) or more	10	40	60	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 50
-	1 Piece(s)	7 Day(s) or more	10	40	60	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 42
-	1 Piece(s)	8 Day(s) or more	10	15	72	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 50
-	1 Piece(s)	8 Day(s) or more	10	25	72	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 50
-	1 Piece(s)	8 Day(s) or more	10	25	72	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 35
-	1 Piece(s)	8 Day(s) or more	10	30	72	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 50
-	1 Piece(s)	8 Day(s) or more	10	30	72	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 35
-	1 Piece(s)	8 Day(s) or more	10	40	72	Shape E	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 50
-	1 Piece(s)	8 Day(s) or more	10	40	72	Shape F	[Steel] S45C Equivalent	Black Oxide Coating	20 ～ 50

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Product TOP

Basic Information

Type	Keyless Bushings	Belt Type	S8M	Timing Pulley / Idler	Pulleys

Configure

552 Part Numbers

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Configure Remaining Specifications

Completed

Specification/Dimensions

Belt Width Used(mm)
15

25

30

40
Clear
No. of Teeth(T)
18

19

20

21

22

24

25

26

28

30

32

34

36

38

40

44

48

50

60

72
Clear
Pulley Shape
- Shape E
- Shape F
Clear
Material
- Steel
  - S45C Equivalent
- Aluminum
  - Extra Super Duralumin Series Aluminum Alloy
Clear
Surface Treatment
- Black Oxide Coating
- Clear Anodize
- Hard Clear Anodize
- Electroless Nickel Plating
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
- HTLA□□S8M
- HTLG□□S8M
- HTLK□□S8M
- HTPL□□S8M
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

7 Day(s) or Less

8 Day(s) or Less
Clear

Specify Alterations

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

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Keyless High Torque Timing Pulleys - S8M (Part Numbers)

(i)Caution

Specification Table

Alterations

Part Number

Basic Information

Configure

Specification/Dimensions

Belt Width Used(mm)

No. of Teeth(T)

Pulley Shape

Material

Surface Treatment

Shaft Bore Dia. [d](mm)

type

CAD

Days to Ship

Specify Alterations

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