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Inch Double Row Tapered Roller Bearings

inch double row tapered roller bearings

 

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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