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NTN NF228 cylindrical roller bearing with a 140 mm straight bore. NF configuration features a separable inner ring with one flange for axial location in one direction. Open enclosure with pressed steel cage. Constructed from hardened alloy steel for heavy-duty industrial applications such as gearboxes and mill drives.
MODEL NF228
$1,669.20 Each
Prices are subject to change
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Returnable:No
B (in)
1.6535
Bore Type
Round
Bore type
Round
Cage Material
Pressed Steel
Cage material
Pressed steel
Configuration
One
D (in)
9.8425
d (in)
5.5118
Da max
9.3307 in
da min
6.0236 in
Db max
9.3307 in
Db min
8.8583 in
db min
6.0236 in
Dynamic Load Rating
69500 lbf
Dynamic load rating
69500 lbf
Enclosure
Open
Ew
8.7008 in
I.D.
140 mm
J (in)
7.0669
Limiting Speed - Grease
2700 RPM
Limiting speed - grease
2700 RPM
Limiting Speed - Oil
3100 RPM
Limiting speed - oil
3100 RPM
Material
Hardened alloy steel
O.D.
250 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)
0.0984
r1as max
0.0984 in
Radial Internal Clearance
CN
Radial internal clearance
CN
Static Load Rating
90000 lbf
Static load rating
90000 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 | 3100 RPM |
Limiting Speed - Grease | 2700 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 | 90000 lbf400000 N400.00 kN |
Dynamic Load Rating | 69500 lbf310000 N310.00 kN |
Enclosure | Open |
Weight | 18.453 lb8.370 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 5.5118 in140.000 mm |
D | 9.8425 in250.000 mm |
B | 1.6535 in42.000 mm |
Ew | 8.7008 in221.000 mm |
J | 7.0669 in179.500 mm |
r | 0.0984 in2.500 mm |
da min | 6.0236 in153.000 mm |
db min | 6.0236 in153.000 mm |
Da max | 9.3307 in237.000 mm |
Db max | 9.3307 in237.000 mm |
Db min | 8.8583 in225.000 mm |
r1as max | 0.0984 in2.500 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.
