Inch Double Row Tapered Roller Bearings Strcture Features:
Inch double row tapered roller bearings can withstand heavy radial loads, axial loads in two directions and have a high degree of rigidity.
The outer ring (or inner ring) of the imperial double-row tapered roller bearing is a whole. The small end faces of the two inner rings (or outer rings) are similar, and there is a spacer in the middle. The clearance is adjusted by the thickness of the spacer. The thickness of the spacer can also be used to adjust the pre-interference.
They are mainly used in gearboxes, lifting equipment, rolling mills and mining machinery, such as tunnel boring machines
Imperial Taper Roller Bearings Size Chart:
| Model Number | Dimensions (mm) | Mass (kg) |
| NA484/472D | 70×120×65.09 | 2.76 |
| 598/592D | 92.075×152.4×82.55 | 5.74 |
| 687/672D | 101.6×168.275×92.075 | 8.18 |
| 861/854D | 101.6×190.5×127 | 15.59 |
| 896/892D | 136.525×228.6×123.825 | 20.6 |
| 896/892D | 136.525×228.6×123.825 | 19.9 |
| JRM3535/JRM3564XD | 35×64×18.5 | 0.511 |
| JRM3939/JRM3968XD | 39×68×18.5 | 0.541 |
| 8578/8520DC | 241.3×327.025×114.3 | 25 |
| 64450/64700D | 114.3×177.8×92.075 | 7.45 |
| NA46790-SW/46720CD | 165.1×225.425×95.25 | 10.51 |
| NA48685SW/48620D | 147.875×200.025×43.665 | 8.82 |
| 71437/71751D | 111.125×190.5×106.362 | 11.95 |
| 74550/74851ZDC | 139.7×215.9×106.362 | 9.94 |
| 82550/82932D | 139.702×236.538×131.763 | 23.4 |
| 82562/82932D | 142.875×236.538×131.763 | 23.3 |
| NA95500/95927CD | 127×234.95×142.875 | 25.4 |
| 99575/99102CD | 146.05×254×149.225 | 28 |
| EE114080/EE114161DC | 203.2×406.4×169.85 | 107 |
| EE126098/EE126161CD | 249.25×381×171.45 | 63.4 |
| HM126048/HM124618XD | 119.062×195×142.875 | – |
| HM129848/HM129814XD | 144.45×220.663×155.576 | 18.2 |
| L163149/L163110D | 355.6×444.5×136.525 | 44.6 |
| EE181453/EE19235LD | 368.249×523.857×203.2 | 184 |
| NA231400/231976CD | 355.6×501.65×146.05 | 88 |
| JH211749/JH211710/DB | 65×120×86 | 3.89 |
| KJH211749/KJH211710/DB | 65×120×86 | 3.89 |
| KHM237545/KHM237510D | 177.8×288.925×142.875 | 31.4 |
| HM237546DW/HM237510 | 177.8×288.295×123.825 | 31.5 |
| HM237545/HM237510DC | 177.8×288.925×142.875 | 30.8 |
| HM237545/237510CD | 177.8×288.925×142.875 | 33 |
| HM256849/HM256810D | 203.2×276.225×95.25 | 14.8 |
| LM239530T/LM239546TD-LM239549T | (d×D×B1/T)181.808×259.969×161.925 | 24.4 |
| EE243196/EE243251DC | (d×D×B1/T)498.475×634.873×177.8 | 127 |
| HH255149D/HH255110 | (d×D×B1/T)279.4×457.2×244.75 | 180.75 |
| HH258249TD/HH258210 | (d×D×B1/T)303.212×495.3×263.525 | 223.84 |
| HM256849/HM256810D | (d×D×B1/T)300.038×422.275×174.625 | 65.6 |
| HM256849/HM256810D | (d×D×B1/T)300.038×422.275×174.625 | 65.6 |
| HM262749TD/HM262710 | (d×D×B1/T)331.536×488.95×174.625 | 102 |
| HM269010R/HM261049D | (d×D×B1/T)333.375×469.9×342.9 | 194 |
| HM262749TD/HM262710 | (d×D×B1/T)346.175×488.95×174.625 | 103 |
| HM265049/HM265010D/P | (d×D×B1/T)368.249×523.875×214.312 | 143 |
| HM2650497DS/HM265010S | (d×D×B1/T)368.3×523.875×185.738 | 140 |
| HM266449DW/HM266410 | (d×D×B1/T)384.125×546.1×193.675 | 157.016 |
| LM272249DW/LM27221-LM272210D | (d×D×B1/T)482.6×615.95×33.02 | 252 |
| M238840/M238810D | (d×D×B1/T)177.8×269.875×119.062 | 22 |
| M238848/M238810DC | (d×D×B1/T)187.325×269.875×119.062 | 19.3 |
| M249732/M249710CD | (d×D×B1/T)228.6×358.775×152.4 | 56.7 |
| M252349D/M252310 | (d×D×B1/T)269.875×381×136.525 | 51.5 |
| M252349DW/252310 | (d×D×B1/T)269.875×381×282.575 | 101 |
| M255449TD/M255410 | (d×D×B1/T)288.925×406.4×144.463 | 58 |
| M255449TD/M255410 | (d×D×B1/T)288.93×406.4×77.788 | 30.5 |
| M268749DW/M268710 | (d×D×B1/T)415.93×590.55×209.55 | 179 |
| M270749ADW/M270710 | (d×D×B1/T)447.675×635×223.838 | 238.3 |
| M272749/M272710DC | (d×D×B1/T)479.425×679.45×276.225 | 322 |
| M278749D/M278710 | (d×D×B1/T)571.5×812.8×285.25 | 491 |
| M280049D/M280010 | (d×D×B1/T)595.312×844.55×296.862 | 523 |
| E323166D/323290 | (d×D×B1/T)419.227×736.448×406.4 | 799 |
| NA329120/329173D | (d×D×B1/T)304.8×438.048×161.925 | 65.4 |
| L357049NW/L357010D | (d×D×B1/T)304.8×393.7×50.8 | 14.6 |
Bearing Overheat Reasons and Soulutions:
(1) Reason: low bearing accuracy
Method: Use double-row tapered roller bearings with specified accuracy grades.
(2) Reason: The spindle is bent or the box hole is not concentric
Method: Repair the main shaft or box.
(3) Reason: The belt is too tight
Method: Adjust the belt to make it tight.
(4) Reason: poor lubrication
Method: Choose lubricating materials of specified grades and clean them appropriately.
(5) Reason: low assembly quality
Method: Improve assembly quality.
(6) Reason: The inner and outer shell of the bearing runs around
Method: Replace bearings and related wear parts.
(7) Too much axial force
Method: Clean and adjust the sealing ring gap between 0.2mm and 0.3mm, correct the diameter of the balance hole of the impeller and check the static balance value.
(8) Bearing damage
Method: Replace double-row tapered roller bearings.
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