Rex Linkbelt Roller Chain Catalog - Norfolkbearings.com

SprocketsC 2120H sprockets • 3.000" pitchSprockets are usually furnished withtwice the required number of teeth,virtually doubling sprocket life. Sprocketswith only the required number of teeth,can also be furnished.TTLENGTHTHRUBORETCHAINPITCHSCHAINPITCHROOT DIAMETERPIITCH DIAMETEROUTSIDE DIAMETERMAXIMUMHUBDIAMETERCHAINPITCHFig. 6446MAXIMUMBOREFig. 6450Type AType BType CFig. 8382EMaximumNumber Outside Maximum bore with Number Outsideof Pitch Root diameter, hub standard S of Pitch Root diameter,effective diameter, diameter, inches diameter, keyseat, max., effective diameter, diameter, inchesteeth inches inches ∆ inches inches inches teeth inches inches ∆h s h6 6.000 5.125 6.498 3.66 2.438 1.531 22 21.080 20.205 21.8726 1 / 26.456 5.581 6.954 4.19 2.875 1.781 22 1 / 221.557 20.682 22.3697 6.915 6.040 7.473 4.69 3.188 1.969 23 22.032 21.157 22.8297 1 / 27.376 6.501 7.934 5.20 3.750 2.344 23 1 / 222.508 21.633 23.30588 7.839 6.964 8.440 5.70 4.188 2.594 24 22.985 22.110 23.7878 1 / 28.304 7.429 8.905 6.20 4.563 2.781 24 1 / 223.460 22.585 24.2629 8.772 7.897 9.407 6.70 4.938 3.031 25 23.937 23.062 24.7439 1 / 29.240 8.365 9.875 7.20 5.375 3.313 25 1 / 224.413 23.538 25.21910 9.708 8.833 10.370 7.70 5.750 3.563 26 24.890 24.015 25.70010 1 / 210.178 9.303 10.840 8.19 6.125 3.813 26 1 / 225.365 24.490 26.17511 10.649 9.774 11.333 8.69 6.438 3.969 27 25.842 24.967 26.65411 1 / 211.120 10.245 11.804 9.17 6.625 4.125 27 1 / 226.318 25.443 27.13012 11.591 10.716 12.293 9.66 6.875 4.188 28 26.795 25.920 27.61112 1 / 212.063 11.188 12.765 10.14 7.125 4.313 28 1 / 227.270 26.395 28.08613 12.536 11.661 13.254 10.64 7.500 4.563 29 27.747 26.872 28.56513 1 / 213.008 12.133 13.726 11.13 7.875 4.813 29 1 / 228.224 27.349 29.04214 13.482 12.607 14.213 11.61 8.250 4.906 30 28.701 27.826 29.52314 1 / 213.956 13.081 14.687 12.09 8.625 5.125 30 1 / 229.177 28.302 29.99915 14.430 13.555 15.172 12.58 9.125 5.438 31 29.654 28.779 30.47815 1 / 214.904 14.029 15.646 13.06 9.625 5.688 31 1 / 230.131 29.256 30.95516 15.378 14.503 16.130 13.58 9.938 5.938 32 30.608 29.733 31.43516 1 / 215.852 14.977 16.604 14.03 32 1 / 231.085 30.210 31.91217 16.328 15.453 17.089 14.52 33 31.560 30.685 32.38917 1 / 216.802 15.927 17.563 15.00 34 32.514 31.639 33.34518 17.277 16.402 18.046 15.48 35 33.468 32.593 34.30018 1 / 217.751 16.876 18.520 15.95 36 34.421 33.546 35.26019 18.227 17.352 19.003 16.44 37 35.375 34.500 36.21019 1 / 218.701 17.826 19.477 16.92 38 36.329 35.454 37.17020 19.178 18.303 19.958 17.41 39 37.283 36.408 38.12020 1 / 219.653 18.778 20.434 17.89 40 38.237 37.362 39.08021 20.129 19.254 20.916 18.3621 1 / 220.604 19.729 21.391 Consult Rexnord.Hub length thru boreSprockettypeNumber of Hub length Sprocket Number of Hub lengtheffective thru bore, type effective thru boreteeth inches teeth inches6 2.00 7 to 18 3.506 1 / 2to 8 2.25 18 1 / 2to 23 3.75B 81/2 to 17 2.50 C 231/2 to 30 4.00171/2 to 26 2.75 301/2 to 36 4.25261/2 to 36 3.00 37 to 40 4.5037 to 40 3.25Tooth dimensionsT = .924" + .000", –.016" for machined sprockets.T = .924" + .000", –.057" for hot rolled platesprockets or unfinished forgings.Standard bore tolerances, keyseat dimensions, eccentricity tolerances, and similar data, page G-2.h “Effective” describes the number of teeth that engage the chain rollers during each revolution of the sprocket. See Fig. 8382 above. The effective number isused to calculate chain speed. Sprockets are normally furnished with twice the effective number listed. When the actual number of teeth is 24 or more,sprockets for No. 120 roller chain may be used. See page C-25 for sprocket data.∆ Non-functional dimension that may vary with the type of cutter used.s Based on maximum hub diameter.E-20