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NTN 66584/66520 inch series tapered roller bearing set comprising cone 66584 and cup 66520. Straight bore, open design, case carburized steel construction. Single row configuration handles combined radial and axial loads in industrial gearboxes, conveyors, and axle applications.
MODEL 66584/66520
$130.14 Each
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a (Effective Load Center)
0.0800 in
B (in)
2.1250
Bore type
Round
Bore Type
Round
Cone Number
66584
Configuration
One
Cup Number
66520
D (in)
4.8125
Dynamic load rating
32500 lbf
Dynamic Load Rating
32500 lbf
e (Axial Load Factor)
0.67
Enclosure
Open
I.D.
2.125 in
Lubrication
w/o Oil Hole
Material
Case Carburized Steel
O.D.
4.8125 in
Operating temperature range
-40 to 250 ºF
Operating Temperature Range
-40 to 250 °F
Precision rating
Class 4
Precision Rating
Class 4
R (in)
0.14
r (in)
0.1300
Static load rating
40500 lbf
Static Load Rating
40500 lbf
Style
Cone & Cup
Type
Tapered Roller Bearing
U
2.95 in
V
2.68 in
W
1.3125 in
Wi
1.2500 in
Wo
0.9375 in
X
4.57 in
Y2 (Axial Load Factor)
0.9
Z
4.13 in
Technical Specifications
Type | Tapered Roller Bearing |
Bore Type | Round |
Material | Case Carburized Steel |
Style | Cone & Cup |
Precision Rating | Class 4 |
Cone Number | 66584 |
Cup Number | 66520 |
Configuration | One |
Lubrication | w/o Oil Hole |
e (Axial Load Factor) | 0.67 |
Y2 (Axial Load Factor) | 0.9 |
Static Load Rating | 40500 lbf181000 N181.00 kN |
Dynamic Load Rating | 32500 lbf144000 N144.00 kN |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
B | 2.1250 in53.975 mm |
D | 4.8125 in122.238 mm |
Wo | 0.9375 in23.813 mm |
Wi | 1.2500 in31.750 mm |
W | 1.3125 in33.338 mm |
r | 0.1300 in3.300 mm |
R | 0.14 in3.5 mm |
a (Effective Load Center) | 0.0800 in2.000 mm |
U | 2.95 in75.0 mm |
V | 2.68 in68.0 mm |
X | 4.57 in116.0 mm |
Z | 4.13 in105.0 mm |
How do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
| Brand | IKO Bearing |
| Model | IRT2010-1 |