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Rollway NU 308 EM 40 mm Bore Size, 90 mm Outside Diameter, Radial Cylindrical Roller Bearing, Caged Roller, Straight Bore, Unsealed, High Chromium Bearing Steel, C0 Radial Clearance 40 mm Bore Size, 90 mm Outside Diameter, Radial Cylindrical Roller Bearing, Caged Roller, Straight Bore, Unsealed, High Chromium Bearing Steel, C0 Radial Clearance
MODEL NU 308 EM
Contact supplier for technical support on: 800-626-2120
$334.40 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable:No
Bore Size (mm)
40
Bore Type
Straight
Cage Material
Brass
Duplexing
No
Dynamic Load Rating (kN)
79.899
Dynamic Load Rating (lb)
17962
Flanges
(2) Flanges on Outer Ring
Full Complement/Caged
Caged
Height
3.54
Inner Race Configuration
Separable Both Directions
Length
3.54
Material
High Chromium Bearing Steel
Misalignment
No
Number of Rows
1
O.D. (mm)
90
Outer Race Configuration
Non-Separable
Overall Width (mm)
23
Platform
Cylindrical Radial
Profile
Complete with Outer and Inner Race
Radial Clearance
C0
Retainer
Yes
Rolling Element
Cylindrical Roller
Seal Type
Unsealed
Sealed
None
Snap Ring
No
Speed [Max] Grease (RPM)
7000
Speed [Max] Oil (RPM)
8500
Static Load Rating (kN)
77.5
Static Load Rating (lb)
17423
Version
EM: Extra capacity design; Machined brass retainer
Width
0.91
| Rows of rollers | Single row |
|---|---|
| Retainer | Machined Brass |
| Inner Race Configuration | Separable Both Directions |
| Outer Race Configuration | Non-Separable |
| Version | EM: Extra capacity design; Machined brass retainer |
| Additional Information | Suitable for radial loads only |
| Sale Qty Multiple: | 1 |
|---|---|
| Packaged Length: | 4.06 |
| Packaged Width: | 4.06 |
| Packaged Height: | 1.14 |
| No. Links/Ft. : | 0 |
| Rows of rollers: | Single row |
| Retainer: | Machined Brass |
| Inner Race Configuration: | Separable Both Directions |
| Outer Race Configuration: | Non-Separable |
| Version: | EM: Extra capacity design; Machined brass retainer |
| Additional Information: | Suitable for radial loads only |
Dimensions
| Part No | NU 308 EM |
|---|---|
| Description | NU 308 EM |
| d | 40mm (1.5748 inch) |
| D | 90mm (3.5433 inch) |
| B | 23mm (0.9055 inch) |
| Basic Dynamic Rating Cr | 79.9kN (17, 962 pounds) |
| Basic Static Rating Cor | 77.5kN (17, 423 pounds) |
| Limiting Speed Grease (RPM) | 7, 000 |
| Limiting Speed Oil (RPM) | 8, 500 |
| F | 52mm (2.0472 inch) |
| rs min | 1.5mm (0.0591 inch) |
| r1s min | 1.5mm (0.0591 inch) |
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.
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