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@It is fundamentally designed for high speed running. Special and adequate heat-treatment imposed on components ascents to tougher hardness against friction and superior strength against fatigue in this chain. With coexisting capabilities of stretch resistance and low noise, this chain is also considerably recommended for engine timing application.
Model
NO.
Pitch
Roller Link Width
(Min)
Bushing Dia. (Max)
Pin Link Plate Thickness
Roller Link Plate Thickness
Link Plate Height
(Max)

Pin Dia.
(Max)

Minimum Tensile Strength
Average Tensile Strength
Fatigue resistance
P
W
D
T1
T2
H
d
/
/
max
mm
mm
mm
mm
mm
mm
mm
kgf
kgf
kgf
25H
6.35
3.10
3.30
1.0
1.0
6.0
2.31
490
620
100
25HT
6.35
3.10
3.30
1.0
1.0
6.0
2.31
490
620
100
25HA
6.35
3.10
3.30
1.0
1.0
6.0
2.31
490
550
/
25HG
6.35
3.10
3.30
1.0
1.0
6.0
2.31
490
650
/
25HD
6.35
3.18
3.30
1.0
1.0
6.0
2.31
550
630
100
25E
6.35
3.20
3.28
0.7
/
5.80
2.31
380
430
/
25SH
6.35
3.20
3.28
1.0
1.0
5.80
2.00
530
590
/
25FH
6.35
3.20
3.28
1.0
/
5.80
2.31
550
620
/
25HX
6.35
3.20
3.28
1.0
1.0
5.80
2.31
550
630
/
219HG
7.774
4.68
4.59
1.3
1.4
7.6
3.01
900
1050
/
219H
7.774
4.68
5
1.0
1.2
7.3
3.01
750
790
120
219SH
7.774
4.60
4.59
1.3
1.4
7.6
3.01
1000
1200
150
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