PTI Bearing Catalog - Norfolkbearings.com

Metric Sprockets
ISO 20B Hub Type B
DIN 8187/ISO R 606
Chain Size: 20B-1 (1-1/4” x 3/4”)
Pitch: 31.75 mm
Roller Width: 19.56 mm
Roller Dia.: 19.05 mm
Spkt. Width: 18.5 mm (bf 1 )
Material: Steel C45
Part No.
Teeth
d o
mm
d k
mm
d n
mm
d 1
mm
d 2
mm
L
mm
Wt.
kg
20B-8B 8 82.96 98.1 53 20 25 40 0.95
20B-9B 9 92.84 108.0 63 20 35 40 1.20
20B-10B 10 102.7 118 70 20 40 40 1.60
20B-11B 11 112.6 127.8 77 20 47 45 2.15
20B-12B 12 122.7 138 88 20 54 45 2.73
20B-13B 13 132.7 148 98 20 61 45 3.30
20B-14B 14 142.7 158 108 20 68 45 3.90
20B-15B 15 152.7 168 118 20 75 45 4.65
20B-16B 16 162.7 178 120 25 75 50 5.40
20B-17B 17 172.8 188 120 25 75 50 5.80
20B-18B 18 182.8 198 120 25 75 50 6.20
20B-19B 19 192.9 208 120 25 75 50 6.60
20B-20B 20 202.9 218 120 25 75 50 7.05
20B-21B 21 213.0 228 140 25 90 55 9.10
20B-22B 22 223.1 238 140 25 90 55 9.40
20B-23B 23 233.2 248 140 25 90 55 10.0
bf 1
20B-24B 24 243.2 258 140 25 90 55 10.1
20B-25B 25 253.3 268 140 25 90 55 10.2
20B-26B 26 263.4 279 150* 25 100 55 10.3
20B-27B 27 273.5 289 150* 25 100 55 10.4
20B-28B 28 283.6 299 150* 25 100 55 10.5
20B-29B 29 293.7 309 150* 25 100 55 11.0
d n d 2
d 1
d o
d k
20B-30B 30 303.8 319 150* 25 100 55 12.0
20B-31B 31 313.9 329 150* 25 100 55 13.5
20B-32B 32 323.9 339 150* 25 100 55 14.0
20B-33B 33 334.0 349 150* 25 100 55 15.5
20B-34B 34 344.1 359 150* 25 100 55 16.8
20B-35B 35 354.2 369 150* 25 100 55 16.9
20B-36B 36 364.3 379 150* 25 100 55 17.0
L
20B-37B 37 374.4 389 150* 25 100 55 18.5
20B-38B 38 384.5 400 150* 25 100 55 19.3
20B-39B 39 394.6 410 150* 25 100 55 20.0
20B-40B 40 404.7 420 150* 25 100 55 20.2
Note: * Fabricated with welded hub.
361 P.T. International Corp.