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The single-row type consists of the cone assembly and the cup. It is usually fitted as one of an opposing pair. During equipment assembly, single-row bearings can be set to the required clearance (endplay) or preload condition to optimize performance.

Single-row tapered roller bearings have positive roller alignment that ensures true rolling motion and generates a “seating force” that pushes the roller against the cone large rib. This seating force prevents the rollers from skewing off apex, thereby keeping them positively aligned and located against the cone large rib. 


Single Row Taper Roller Bearings
Designations old spec. boundary dimensions Weight
mm kg
d D T B C Reference
30240 7240E 200 360 64 58 48 24.7
32944 2007944E 220 300 51 51 39 10
32044 2007144E 220 340 76 76 57 24
32244 7544E 220 400 114 108 90 59.2
30244 7244E 220 400 72 65 54 35.4
30344 7344E 220 460 97 88 73 71.8
32948 2007948E 240 320 51 51 39 10.7
32048 2007148E 240 360 76 76 57 25.9
　 2007148 240 360 76 72 62 25.1
32248 7548E 240 440 127 120 100 80.2
32952 2007952E 260 360 63.5 64 48 18.6
32052 2007152E 260 400 87 87 65 37.9
　 7552 260 480 137 130 106 102
32252 7552E 260 480 137 130 105 102
　 7352 260 540 114 102 85 108
32056 2007156E 280 420 87 87 65 40.3
32960 2007960E 300 420 76 76 57 31.5
32060 2007160E 300 460 100 100 74 57.8
　 2007160 300 460 100 95 77 55.2
　 2007964 320 440 76 72 65 32
32064 2007164E 320 480 100 100 74 60.7
32968 2007968E 340 460 76 76 57 34.8
　 2007972 360 480 76 72 62 32.2
31080X2 7180 400 600 95 90 67 83.8
　 71/630 630 920 135 128 94 257

Designations Boundary Dimensions Weight
mm kg
d D T B C
580/572 82.55 139.992 36.512 36.098 28.575 2.13
749A/742 82.55 150.089 44.45 46.672 36.512 3.37
749/742 85.026 150.089 44.45 46.672 36.512 3.23
665A/653 85.725 146.05 41.275 41.725 31.75 2.65
HM518445/HM518410 88.9 152.4 39.688 39.688 30.162 2.81
HM218248/HM218210 89.974 146.975 40 40 32.5 2.5
JW9549/JW9510 95 180 49 45 33 5.08
594A/592A 95.25 152.4 39.688 36.322 30.162 2.5
HM220149/HM220110 100 157 42 42 34 2.93
780/772 101.6 180.975 47.625 48.006 38.1 5.06
941/932 101.6 212.725 66.675 66.675 53.975 11.2
782/772 104.775 180.975 47.625 48.006 38.1 4.86
938/932 114.3 212.725 66.675 66.675 53.975 10.1
898/892 139.7 228.6 57.15 57.15 44.45 8.77
JM738249/JM738210 190 260 46 44 36.5 6.61
LL758744/LL758715 323.85 381 28.575 28.575 20.638 5.7
EE333137/333197 349.25 501.65 90.488 84.138 69.85 52.1
EE33140/333197 355.6 501.65 90.488 84.138 69.85 49.8