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Keyless High Torque Timing Pulleys - S8M - MechaLock Standard Type Incorporated (with Centering Function) (Part Numbers)

Keyless High Torque Timing Pulleys - S8M - MechaLock Standard Type Incorporated (with Centering Function)
  • Volume Discount

[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.
■S8M
● Pulley Shape
Shape E
Shape F
Standard Tooth Profile
Tooth groove dimensions slightly vary according to the number of teeth. (Pitch: 8.0mm)

■Dimensional Tolerances Without Command
Dimension RangeTolerance
(mm)
Overor Less
0.53±0.1
36±0.1
630±0.2
30120±0.3
120400±0.5
[ ! ]Compliant with JIS B 0405 Class m (intermediate).
*3 For the combination of nominal width and MechaLock inner diameter shown in Table 2, the MechaLock mounting holes are not stepped holes, but are through holes of the MechaLock outer diameter. ([ ! ] Shape E only)
[ ! ] Surface treatment may not be applied to the shaft bores.
[ ! ] Machined flange for 72 toothed pulleys.
[ ! ] Flange is installed. 
[ ! ] For orders with no flange, please specify the alteration NFC.
[ ! ] Compatible with S8M type from Mitsuboshi Belting Ltd. as well as Bando Chemical Industries Ltd.
[ ! ] 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.

dH7Max. allowable torque (N⋅m)D1(L)
HHTA·HHTK
HHTN・HHTT
HHTM
HHTPHHTAS
1244.136.224.528.56.5
1463.750.928.430.5
1580.454.830.431.5
1683.358.833.0
1792.276.433.5
1895.180.334.5
1998.185.235.5
20216.0183.012242.08
22255.0201.044.0
24363.0252.046.0
25392.0264.015347.0
28441.0295.050.08.5
30500.0396.023052.0
32530.0423.054.0
35883.0548.062.010
401079.0779.067.0
451285.0882.072.0
501706.01362.077.010.5
 

■List of MechaLocks by part number

HHTAHHTKHHTNHHTASHHTTHHTMHHTP
MLMMLHSMLMMLMBMLMP

Table 2: pulley through hole combination

Nominal WidthMechaLock inner dia. dH7
S8M15020·22
 

■Belt Nominal Width / Dimensions

mmNominal
S8M150S8M250S8M300S8M400
A17283344
W22333849
Y22(up to d22)
24(d24 to 30)
24.5(d32 or more)
24(up to d22)
25(d24 to 32)
28(d35 or more)
30(up to d22)
31(d24 to 32)
34(d35 or more)

■Mechalock bolt tightening torque
  (N⋅m)

typeMLMMLMBMLMPMLHS
d
63.93.23.92.7
8
10
12
14
15
16
17
18
19
208.87.58.85.6
22
24
25
28
30
32
3515.712.715.79.6
38
40
42
45
48
50
TypePart number[M]Material*1[S] Surface Treatment
Belt width: 15 mmBelt width: 25 mmBelt width: 30 mmBelt width: 40 mmPulleyFlangeMechaLockPulleyFlangeMechaLock
S8M150S8M250S8M300S8M400
HHTAExtra Super Duralumin
Aluminum alloy
Aluminum alloyS45C EquivalentClear Anodize
HHTKHard Clear Anodized *2
HHTNElectroless nickel plating
HHTASSUS304 EquivalentClear Anodize
HHTTS45C
equivalent
SPCCS45C Equivalent
HHTMBlack Oxide Coating
HHTPElectroless 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 numberPulley ShapeShaft Bore Dia.
HHTA 60S8M300F40
Part number
Pulley
Shape
dH7 range 1 mm increments
P.D
O.D
F
E
Type
Number of Teeth
Type
Nominal Width
HHTA,HHTK,HHTN・HHTT,HHTM,HHTP
HHTAS
Shape E
Shape F
Shape EShape F
S8M150S8M250,S8M300,S8M400S8M250S8M300S8M400S8M150S8M250,S8M300,
S8M400
S8M250,S8M300,
S8M400
HHTA

HHTK

HHTN

HHTAS

HHTT

HHTM

HHTP
19
S8M150

S8M250

S8M300

S8M400
E

F
12,1412,1412,1448.3847.015540
20
50.9349.565849
21
12,14-1612,14-1612,14,1553.4852.106145
22
56.0254.65
23
58.5757.206750
24
12,14-1912,14-1961.1259.74
25
12,14-2012,14-2012,14,15,2063.6662.297056
26
14-20,2214-20,2266.2164.847458
27
68.7567.388060
28
71.3069.93
29
73.8572.48
30
14-20,2214-20,22,24,25,2814-20,22,24,25,2814,15,2014,15,20,2576.3975.028767
31
78.9477.57
32
81.4980.12
33
84.0382.66
34
16-20,2216-20,22,24,25,28,30,3216-20,22,24,25,28,30,322020,25,3086.5885.219575
35
89.1387.75
36
91.6790.309980
37
94.2292.85
38
96.7795.3910484
39
99.3197.9411190
40
20,2220,22,24,25,28,30,32,3520,22,24,25,28,30,3220,22,24,25,28,30,32,35101.86100.49
41
104.41103.03
42
106.95105.58
43
109.50108.13119100
44
112.05110.67
45
114.59113.22123102
46
117.14115.77
47
119.68118.31127105
48
20,2220,22,24,25,28,30,32,35,40,4520,22,24,25,28,30,3220,22,24,25,28,30,32,35,40,45122.23120.86
49
124.78123.41135115
50
20,2220,22,24,25,28,30,32,35,40,45,5020,22,24,25,28,30,
32
20,22,24,25,28,30,32,35,40,
45
20,22,24,25,28,30,32,35,40,45,50127.32125.95
51
129.87128.50
52
132.42131.04140120
53
134.96133.59
54
137.51136.14144125
55
140.06138.68
56
142.60141.23152130
57
145.15143.78
58
147.70146.32160140
59
150.24148.87
60
152.79151.42
72
183.35181.97190170

Alterations

Part numberPulley ShapeShaft Bore Dia.(BMC, etc.)
HHTA 60S8M300E40BMC
AlterationsSurface TreatmentFlange CutNo FlangeSingle Flange
CodeBMC·BMRFCNFCLFC·RFC
Spec.Applies electroless nickel plating on a MechaLock.
(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)
Lowers the flange by cutting.
FC: 0.5 mm Increments
[ ! ] No surface treatment is applied on flange circumference.
The product is shipped without swaging the flange.

(Flange Included)
 
The product is shipped by swaging the flanges either on the bushing side (LFC) or the opposite side (RFC).
(Flange 1 pc. Included)
[ ! ]FC ≥ (O. D.) +1
[ ! ]FC ≤ F-2
Ordering Code FC35

Part Number 

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Part Number
HHTM36S8M250-F-18
HHTM36S8M250-F-19
HHTM36S8M250-F-20
HHTM36S8M250-F-22
HHTM36S8M250-F-24
HHTM36S8M250-F-25
HHTM36S8M250-F-28
HHTM36S8M250-F-30
HHTM36S8M250-F-32
HHTM36S8M300-E-16
HHTM36S8M300-E-17
HHTM36S8M300-E-18
HHTM36S8M300-E-19
HHTM36S8M300-E-20
HHTM36S8M300-E-22
HHTM36S8M300-E-24
HHTM36S8M300-E-25
HHTM36S8M300-E-28
HHTM36S8M300-E-30
HHTM36S8M300-E-32
HHTM36S8M300-F-16
HHTM36S8M300-F-17
HHTM36S8M300-F-18
HHTM36S8M300-F-19
HHTM36S8M300-F-20
HHTM36S8M300-F-22
HHTM36S8M300-F-24
HHTM36S8M300-F-25
HHTM36S8M300-F-28
HHTM36S8M300-F-30
HHTM36S8M300-F-32
HHTM36S8M400-E-16
HHTM36S8M400-E-17
HHTM36S8M400-E-18
HHTM36S8M400-E-19
HHTM36S8M400-E-20
HHTM36S8M400-E-22
HHTM36S8M400-E-24
HHTM36S8M400-E-25
HHTM36S8M400-E-28
HHTM36S8M400-E-30
HHTM36S8M400-E-32
HHTM36S8M400-F-16
HHTM36S8M400-F-17
HHTM36S8M400-F-18
HHTM36S8M400-F-19
HHTM36S8M400-F-20
HHTM36S8M400-F-22
HHTM36S8M400-F-24
HHTM36S8M400-F-25
HHTM36S8M400-F-28
HHTM36S8M400-F-30
HHTM36S8M400-F-32
HHTM38S8M150-E-16
HHTM38S8M150-E-17
HHTM38S8M150-E-18
HHTM38S8M150-E-19
HHTM38S8M150-E-20
HHTM38S8M150-E-22
HHTM38S8M250-E-16
HHTM38S8M250-E-17
HHTM38S8M250-E-18
HHTM38S8M250-E-19
HHTM38S8M250-E-20
HHTM38S8M250-E-22
HHTM38S8M250-E-24
HHTM38S8M250-E-25
HHTM38S8M250-E-28
HHTM38S8M250-E-30
HHTM38S8M250-E-32
HHTM38S8M250-F-16
HHTM38S8M250-F-17
HHTM38S8M250-F-18
HHTM38S8M250-F-19
HHTM38S8M250-F-20
HHTM38S8M250-F-22
HHTM38S8M250-F-24
HHTM38S8M250-F-25
HHTM38S8M250-F-28
HHTM38S8M250-F-30
HHTM38S8M250-F-32
HHTM38S8M300-E-16
HHTM38S8M300-E-17
HHTM38S8M300-E-18
HHTM38S8M300-E-19
HHTM38S8M300-E-20
HHTM38S8M300-E-22
HHTM38S8M300-E-24
HHTM38S8M300-E-25
HHTM38S8M300-E-28
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSBelt Width Used
(mm)
No. of Teeth
(T)
Pulley Shape Material Surface Treatment Shaft Bore Dia. d
(mm)

MYR 561.30

1 Piece(s) 7 Day(s) 102536Shape F[Steel] S45C EquivalentBlack Oxide Coating18

MYR 561.30

1 Piece(s) 7 Day(s) 102536Shape F[Steel] S45C EquivalentBlack Oxide Coating19

MYR 569.79

1 Piece(s) 7 Day(s) 102536Shape F[Steel] S45C EquivalentBlack Oxide Coating20

MYR 574.64

1 Piece(s) 7 Day(s) 102536Shape F[Steel] S45C EquivalentBlack Oxide Coating22

MYR 578.27

1 Piece(s) 7 Day(s) 102536Shape F[Steel] S45C EquivalentBlack Oxide Coating24

MYR 586.76

1 Piece(s) 7 Day(s) 102536Shape F[Steel] S45C EquivalentBlack Oxide Coating25

MYR 595.25

1 Piece(s) 7 Day(s) 102536Shape F[Steel] S45C EquivalentBlack Oxide Coating28

MYR 624.34

1 Piece(s) 7 Day(s) 102536Shape F[Steel] S45C EquivalentBlack Oxide Coating30

MYR 609.79

1 Piece(s) 7 Day(s) 102536Shape F[Steel] S45C EquivalentBlack Oxide Coating32

MYR 589.18

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating16

MYR 589.18

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating17

MYR 556.30

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating18

MYR 595.25

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating19

MYR 603.73

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating20

MYR 608.58

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating22

MYR 612.22

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating24

MYR 620.70

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating25

MYR 629.19

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating28

MYR 658.28

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating30

MYR 643.74

1 Piece(s) 7 Day(s) 103036Shape E[Steel] S45C EquivalentBlack Oxide Coating32

MYR 589.18

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating16

MYR 589.18

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating17

MYR 595.25

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating18

MYR 595.25

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating19

MYR 603.73

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating20

MYR 608.58

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating22

MYR 612.22

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating24

MYR 620.70

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating25

MYR 629.19

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating28

MYR 658.28

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating30

MYR 643.74

1 Piece(s) 7 Day(s) 103036Shape F[Steel] S45C EquivalentBlack Oxide Coating32

MYR 614.64

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating16

MYR 614.64

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating17

MYR 620.70

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating18

MYR 620.70

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating19

MYR 629.19

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating20

MYR 635.25

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating22

MYR 637.67

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating24

MYR 646.16

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating25

MYR 655.86

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating28

MYR 684.96

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating30

MYR 670.41

1 Piece(s) 7 Day(s) 104036Shape E[Steel] S45C EquivalentBlack Oxide Coating32

MYR 614.64

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating16

MYR 614.64

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating17

MYR 620.70

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating18

MYR 620.70

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating19

MYR 629.19

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating20

MYR 635.25

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating22

MYR 637.67

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating24

MYR 603.89

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating25

MYR 655.86

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating28

MYR 684.96

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating30

MYR 670.41

1 Piece(s) 7 Day(s) 104036Shape F[Steel] S45C EquivalentBlack Oxide Coating32

MYR 551.61

1 Piece(s) 7 Day(s) 101538Shape E[Steel] S45C EquivalentBlack Oxide Coating16

MYR 551.61

1 Piece(s) 7 Day(s) 101538Shape E[Steel] S45C EquivalentBlack Oxide Coating17

MYR 557.66

1 Piece(s) 7 Day(s) 101538Shape E[Steel] S45C EquivalentBlack Oxide Coating18

MYR 557.66

1 Piece(s) 7 Day(s) 101538Shape E[Steel] S45C EquivalentBlack Oxide Coating19

MYR 566.15

1 Piece(s) 7 Day(s) 101538Shape E[Steel] S45C EquivalentBlack Oxide Coating20

MYR 571.00

1 Piece(s) 7 Day(s) 101538Shape E[Steel] S45C EquivalentBlack Oxide Coating22

MYR 595.25

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating16

MYR 595.25

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating17

MYR 601.30

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating18

MYR 601.30

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating19

MYR 609.79

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating20

MYR 615.86

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating22

MYR 618.28

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating24

MYR 627.98

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating25

MYR 636.47

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating28

MYR 665.56

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating30

MYR 651.01

1 Piece(s) 7 Day(s) 102538Shape E[Steel] S45C EquivalentBlack Oxide Coating32

MYR 595.25

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating16

MYR 595.25

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating17

MYR 601.30

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating18

MYR 601.30

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating19

MYR 609.79

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating20

MYR 615.86

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating22

MYR 618.28

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating24

MYR 627.98

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating25

MYR 636.47

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating28

MYR 665.56

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating30

MYR 651.01

1 Piece(s) 7 Day(s) 102538Shape F[Steel] S45C EquivalentBlack Oxide Coating32

MYR 634.04

1 Piece(s) 7 Day(s) 103038Shape E[Steel] S45C EquivalentBlack Oxide Coating16

MYR 634.04

1 Piece(s) 7 Day(s) 103038Shape E[Steel] S45C EquivalentBlack Oxide Coating17

MYR 640.10

1 Piece(s) 7 Day(s) 103038Shape E[Steel] S45C EquivalentBlack Oxide Coating18

MYR 640.10

1 Piece(s) 7 Day(s) 103038Shape E[Steel] S45C EquivalentBlack Oxide Coating19

MYR 648.59

1 Piece(s) 7 Day(s) 103038Shape E[Steel] S45C EquivalentBlack Oxide Coating20

MYR 653.43

1 Piece(s) 7 Day(s) 103038Shape E[Steel] S45C EquivalentBlack Oxide Coating22

MYR 657.07

1 Piece(s) 7 Day(s) 103038Shape E[Steel] S45C EquivalentBlack Oxide Coating24

MYR 665.56

1 Piece(s) 7 Day(s) 103038Shape E[Steel] S45C EquivalentBlack Oxide Coating25

MYR 675.26

1 Piece(s) 7 Day(s) 103038Shape E[Steel] S45C EquivalentBlack Oxide Coating28

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Basic Information

Type Keyless Bushings Belt Type S8M Timing Pulley / Idler Pulleys

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