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NTN NU224 is a single-row cylindrical roller bearing with a 120 mm straight bore. The NU design features no flanges on the outer ring, making it separable and capable of accommodating axial expansion. This bearing is suitable for applications requiring free axial movement of the shaft relative to the housing, such as gearboxes, electric motors, and pumps.
MODEL NU224
$763.75 Each
Prices are subject to change
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Returnable:No
B (in)
1.5748
Bore Type
Round
Bore type
Round
Cage Material
Pressed Steel
Cage material
Pressed steel
Configuration
One
d (in)
4.7244
D (in)
8.4646
Da max
8.0315 in
da min
5.1575 in
Db max
8.0315 in
db min
5.1575 in
Dynamic Load Rating
58500 lbf
Dynamic load rating
58500 lbf
Enclosure
Open
Fw
5.6496 in
I.D.
120 mm
Limiting Speed - Grease
3200 RPM
Limiting speed - grease
3200 RPM
Limiting Speed - Oil
3700 RPM
Limiting speed - oil
3700 RPM
Material
Hardened alloy steel
O.D.
215 mm
Oil Hole
w/o Oil Hole
Oil hole
w/o Oil Hole
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
r (in)
0.0787
r1as max
0.0787 in
Radial Internal Clearance
CN
Radial internal clearance
CN
Static Load Rating
72000 lbf
Static load rating
72000 lbf
Tolerance
ISO class 0 (RBEC 1)
Type
Cylindrical Roller Bearing
Technical Specifications
Type | Cylindrical Roller Bearing |
Bore Type | Round |
Material | Hardened Alloy Steel |
Cage Material | Pressed Steel |
Limiting Speed - Oil | 3700 RPM |
Limiting Speed - Grease | 3200 RPM |
Precision | ISO Class 0 |
Configuration | One |
Tolerance | ISO Class 0 (RBEC 1) |
Oil Hole | w/o Oil Hole |
Radial Internal Clearance | CN |
Static Load Rating | 72000 lbf320000 N320.00 kN |
Dynamic Load Rating | 58500 lbf260000 N260.00 kN |
Enclosure | Open |
Weight | 12.610 lb5.720 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 4.7244 in120.000 mm |
D | 8.4646 in215.000 mm |
B | 1.5748 in40.000 mm |
Fw | 5.6496 in143.500 mm |
r | 0.0787 in2.000 mm |
da min | 5.1575 in131.000 mm |
db min | 5.1575 in131.000 mm |
Da max | 8.0315 in204.000 mm |
Db max | 8.0315 in204.000 mm |
r1as max | 0.0787 in2.000 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.