Keyless High Torque Timing Pulleys - S8M

Brand :

MISUMI

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.

Product Description

[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

■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