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NTN 22780/22720 is a single row tapered roller bearing with a 400 mm straight bore. This open bearing features a case carburized steel construction for enhanced durability under heavy radial and axial loads. Designed for industrial applications such as gearboxes and rolling mills.
MODEL 22780/22720
$61.64 Each
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a (Effective Load Center)
-0.2500 in
B (in)
1.6875
Bore Type
Round
Bore type
Round
Cone Number
22780
Configuration
One
Cup Number
22720
D (in)
3.2500
Dynamic Load Rating
17000 lbf
Dynamic load rating
17000 lbf
e (Axial Load Factor)
0.40
Enclosure
Open
I.D.
1.6875 in
Lubrication
w/o Oil Hole
Material
Case carburized steel
O.D.
3.25 in
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision Rating
Class 4
Precision rating
Class 4
R (in)
0.14
r (in)
0.1300
Static Load Rating
21800 lbf
Static load rating
21800 lbf
Style
Cone & cup
Type
Tapered Roller Bearing
U
2.20 in
V
1.97 in
W
1.0313 in
Wi
1.0625 in
Wo
0.8125 in
X
3.03 in
Y2 (Axial Load Factor)
1.49
Z
2.80 in
Technical Specifications
Type | Tapered Roller Bearing |
Bore Type | Round |
Material | Case Carburized Steel |
Style | Cone & Cup |
Precision Rating | Class 4 |
Cone Number | 22780 |
Cup Number | 22720 |
Configuration | One |
Lubrication | w/o Oil Hole |
e (Axial Load Factor) | 0.40 |
Y2 (Axial Load Factor) | 1.49 |
Static Load Rating | 21800 lbf97000 N97.00 kN |
Dynamic Load Rating | 17000 lbf75500 N75.50 kN |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
B | 1.6875 in42.862 mm |
D | 3.2500 in82.550 mm |
Wo | 0.8125 in20.638 mm |
Wi | 1.0625 in26.988 mm |
W | 1.0313 in26.195 mm |
r | 0.1300 in3.300 mm |
R | 0.14 in3.5 mm |
a (Effective Load Center) | -0.2500 in-6.400 mm |
U | 2.20 in56.0 mm |
V | 1.97 in50.0 mm |
X | 3.03 in77.0 mm |
Z | 2.80 in71.0 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.
