PTI Bearing Catalog - Norfolkbearings.com

Metric Sprockets
ISO 12B-2 and 12B-3 Hub Type B
bf 2
bf 3
d n d2
d1
d o
d k
d n d2
d1
d o
d k
L
L
Chain Size: 12B-2 (3/4” x 7/16”) Chain Size: 12B-3 (3/4” x 7/16”)
Spkt Width: 30.3mm (bf 2 )
Spkt Width: 49.8mm (bf 3 )
Part No.
Teeth
d o
mm
d k
mm
P.T. International Corp.
d n
mm
d 1
mm
d 2 *
mm
L
mm
Weight
kg
12B-2-8B 8 49.78 57.6 31 12 20 45 0.32
12B-2-9B 9 55.70 62.0 37 12 22 45 0.45
12B-2-10B 10 61.64 69.0 42 12 26 45 0.65
12B-2-11B 11 67.61 75.0 47 16 29 50 0.80
12B-2-12B 12 73.60 81.5 53 16 32 50 1.03
12B-2-13B 13 79.59 87.5 59 16 36 50 1.25
12B-2-14B 14 85.61 93.6 65 16 40 50 1.50
12B-2-15B 15 91.63 99.8 71 16 44 50 1.78
12B-2-16B 16 97.65 105.5 77 20 48 50 2.05
12B-2-17B 17 103.67 111.5 83 20 51 50 2.40
12B-2-18B 18 109.71 118.0 89 20 54 50 2.70
12B-2-19B 19 115.75 124.2 95 20 60 50 3.10
12B-2-20B 20 121.78 129.7 100 20 63 50 3.43
12B-2-21B 21 127.82 136.0 100 20 63 50 3.70
12B-2-22B 22 133.86 141.8 100 20 63 50 3.40
12B-2-23B 23 139.90 149.0 110 20 70 50 4.55
12B-2-24B 24 145.94 153.9 110 20 70 50 4.85
12B-2-25B 25 152.00 160.0 120 20 76 50 5.45
12B-2-26B 26 158.04 165.9 120 20 76 50 5.74
12B-2-27B 27 164.09 172.3 120 20 76 50 6.15
12B-2-28B 28 170.13 178.0 120 20 76 50 6.45
12B-2-29B 29 176.19 184.1 120 20 76 50 6.83
12B-2-30B 30 182.25 190.5 120 20 76 50 7.20
12B-2-31B 31 188.31 196.3 130 20 80 50 7.25
12B-2-32B 32 194.35 203.3 130 20 80 50 7.30
12B-2-33B 33 200.40 209.3 130 20 80 50 8.15
12B-2-34B 34 206.46 214.6 130 20 80 50 8.40
12B-2-35B 35 212.52 221.0 130 20 80 50 8.75
12B-2-36B 36 218.58 226.8 130 25 80 50 9.10
12B-2-37B 37 224.64 232.9 130 25 80 50 9.70
12B-2-38B 38 230.69 239.0 130 25 80 50 10.30
12B-2-39B 39 236.75 245.1 130 25 80 50 10.35
12B-2-40B 40 242.81 251.3 130 25 80 50 10.40
*Note: Approximate max bore, consult PTI for larger sizes.
354
Part No.
Teeth
d o
mm
d k
mm
d n
mm
d 1
mm
d 2 *
mm
L
mm
Weight
kg
12B-3-8B 8 49.78 57.6 31 16 20 65 0.50
12B-3-9B 9 55.70 62.0 37 16 22 65 0.50
12B-3-10B 10 61.64 69.0 42 16 26 65 0.90
12B-3-11B 11 67.61 75.0 47 20 29 70 1.10
12B-3-12B 12 73.60 81.5 53 20 32 70 1.37
12B-3-13B 13 79.59 87.5 59 20 36 70 1.75
12B-3-14B 14 85.61 93.6 65 20 40 70 2.11
12B-3-15B 15 91.63 99.8 71 20 44 70 2.47
12B-3-16B 16 97.65 105.5 77 20 48 70 2.90
12B-3-17B 17 103.67 111.5 83 20 51 70 3.26
12B-3-18B 18 109.71 118.0 89 20 54 70 3.81
12B-3-19B 19 115.75 124.2 95 20 60 70 4.35
12B-3-20B 20 121.78 129.7 100 20 63 70 4.85
12B-3-21B 21 127.82 136.0 100 20 63 70 5.25
12B-3-22B 22 133.86 141.8 100 20 63 70 5.88
12B-3-23B 23 139.90 149.0 110 20 70 70 6.50
12B-3-24B 24 145.94 153.9 110 20 70 70 6.93
12B-3-25B 25 152.00 160.0 120 20 76 70 7.65
12B-3-26B 26 158.04 165.9 120 20 76 70 8.20
12B-3-27B 27 164.09 172.3 120 20 76 70 8.85
12B-3-28B 28 170.13 178.0 120 20 76 70 9.30
12B-3-29B 29 176.19 184.1 120 20 76 70 9.95
12B-3-30B 30 182.25 190.5 120 20 76 70 10.60
12B-3-31B 31 188.31 196.3 130 25 80 70 11.40
12B-3-32B 32 194.35 203.3 130 25 80 70 15.40
12B-3-33B 33 200.40 209.3 130 25 80 70 12.50
12B-3-34B 34 206.46 214.6 130 25 80 70 13.50
12B-3-35B 35 212.52 221.0 130 25 80 70 14.50
12B-3-36B 36 218.58 226.8 130 25 80 70 15.00
12B-3-37B 37 224.64 232.9 130 25 80 70 15.50
12B-3-38B 38 230.69 239.0 130 25 80 70 16.15
12B-3-39B 39 236.75 245.1 130 25 80 70 17.20
12B-3-40B 40 242.81 251.3 130 25 80 70 18.20