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NKN Standard Sprockets

NKN Standard Sprockets (Japanese Standard)

NKN 35B
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Chain Type No.35 , 35SS
Pitch (P) 9.525 mm (3/8inch)
Internal Width (W) 4.78 mm
Roller Dia. (Dr) 5.08 mm
Teeth width (T) 4.3 mm
 

Sprockets No. Outside Dia.
Do
Pitch Dia.
Dp
Bore Hub Weight
(kg)
Type Teeth No. Stock min. max. BD BL
NKN 35B 13 44 39.80 9 10 14 32 20 0.02
14 47 42.81 9 10 15 30 20 0.02
15 50 45.81 9 10 17 35 20 0.02
16 53 48.82 9 10 19 37 20 0.03
17 56 51.84 11 12 22 41 20 0.03
18 59 54.85 11 12 22 44 20 0.04
20 65 60.89 11 12 27 50 20 0.05
22 71 66.93 11 12 28 53 20 0.06
24 78 72.97 11 12 28 53 22 0.06
 

 

NKN 40B
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Chain Type No.40 , 40SS
Pitch (P) 12.7 mm (1/2 inch)
Internal width (W) 7.95 mm
Roller Dia. (Dr) 7.95 mm
Teeth width (T) 7.2 mm
 

Sprockets No. Outside Dia.
Do
Pitch Dia.
Dp
Bore Hub Weight
(kg)
Type Teeth No. Stock min. max. BD BL
NKN 40B 13 59 53.07 13 14 18 37 22 0.02
14 63 57.07 13 14 22 42 22 0.02
15 67 61.08 13 14 25 46 22 0.02
16 71 65.10 13 14 27 50 22 0.03
17 75 69.12 13 14 28 54 22 0.03
18 79 73.14 13 14 30 57 22 0.04
20 87 81.18 14 15 35 67 25 0.05
22 95 89.24 14 15 42 75 25 0.06
24 103 97.30 14 15 32 63 25 0.06
 

 

NKN 50B
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Chain Type No.50 , 50SS
Pitch (P) 15.875 mm (5/8 inch)
Internal width (W) 9.53 mm
Roller Dia. (Dr) 10.16 mm
Teeth width (T) 8.7 mm
 

Sprockets No. Outside Dia.
Do
Pitch Dia.
Dp
Bore Hub Weight
(kg)
Type Teeth No. Stock min. max. BD BL
NKN 50B 13 73 66.34 13 14 25 51 25 0.07
14 79 71.34 13 14 28 52 25 0.08
15 84 76.35 13 14 30 57 25 0.09
16 89 81.37 13 14 32 62 25 0.11
17 94 86.39 13 14 35 67 25 0.12
18 99 91.42 13 14 40 72 28 0.15
20 109 101.48 14 15 40 73 28 0.18
22 119 111.55 16 17 40 73 28 0.20
24 129 121.62 16 17 40 73 28 0.21
25 134 126.66 16 17 40 73 28 0.22
 

 

NKN 60B
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Chain Type No.60 , 60SS
Pitch (P) 19.05 mm (3/4 inch)
Internal width (W) 12.70 mm
Roller Dia. (Dr) 11.91 mm
Teeth width (T) 11.7 mm
 

Sprockets No. Outside Dia.
Do
Pitch Dia.
Dp
Bore Hub Weight
(kg)
Type Teeth No. Stock min. max. BD BL
NKN 60B 13 88 79.60 14 15 30 57 32 0.12
14 94 85.61 16 17 32 62 32 0.14
15 101 91.62 16 17 35 68 32 0.16
16 107 97.65 16 17 42 73 32 0.20
17 113 103.67 16 17 42 73 32 0.30
18 119 109.71 16 17 50 83 40 0.35
20 131 121.78 16 17 50 83 40 0.38

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