SKFNU-314-ECPCylindrical Roller Bearing – 70 mm Bore, 150 mm OD, 35 mm Width, NU Design, Polyamide Cage, Separable Rings

Product Description

What this part is

SKF NU 314 ECP is a single-row cylindrical roller bearing in the NU design, with a glass-fibre reinforced polyamide cage. Bore Diameter: 70 mm. Outside Diameter: 150 mm. Overall Width: 35 mm. Rolling Elements: Cylindrical Roller. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Cage Material: Polyamide. Cage Type: One-piece window cage, roller guided. Bearing Material: Chrome steel. Lubricant: Grease or oil. Series: NU 3. Base Number: NU 314. Unit Quantity: 1 Pc.

Decoding the designation

NU — two integral ribs on the outer ring and a ribless inner ring, so the roller set runs free along the inner ring raceway and the bearing floats axially in both directions.

3 — ISO dimension series 3, the heavy section. At a 70 mm bore that gives a 150 mm outside diameter in a 35 mm width.

14 — bore code 14, giving 70 mm.

E — the reinforced execution, with a larger roller complement and a higher load rating than the base design.

C — the current SKF internal design for the E-series cylindrical roller range.

P — one-piece window cage in glass-fibre reinforced polyamide.

What these specs mean in practice

Dynamic Load Rating: 236,000 N. Static Load Rating: 228,000 N. Line contact between a cylindrical roller and a flat raceway spreads the load over a length rather than a point, which is where a 236,000 N dynamic rating in a 150 mm outside diameter comes from, and it is roughly three times what a deep groove ball bearing of the same envelope carries. The NU design leaves the inner ring ribless, so the shaft can grow thermally and the roller set slides along the raceway: this is the free end of a two-bearing shaft, working alongside a located bearing at the other end. The rings separate, so the inner ring can be heated and fitted to the shaft on its own and the outer ring assembly pressed into the housing independently. The polyamide window cage is light and runs quietly, and its low mass is what keeps the speed capability up.

Mounting data

Bore Diameter: 70 mm. Outside Diameter: 150 mm. Overall Width: 35 mm. The inner ring, and the outer ring with its roller and cage assembly, mount separately.

Quantity and configuration

Unit Quantity: 1 Pc. One complete bearing: inner ring plus outer ring with roller and cage assembly.

Interchange guidance

The same bearing is written NU 314 ECP, NU-314-ECP, NU314ECP and NU314.

Cross-Reference 1: SKF NU 314 ECP. Cross-Reference 2: FAG NU314-E-XL-TVP2. Cross-Reference 3: NSK NU314ET. Cross-Reference 4: NTN NU314ET2X. Cross-Reference 5: Koyo NU314R. Cross-Reference 6: Timken NU314EMA. Cross-Reference 7: Nachi NU314EG. Cross-Reference 8: NTN-SNR NU314EG15. Cross-Reference 9: NU314E, the generic ISO form of the reinforced execution.

Every number above shares the 70 x 150 x 35 mm envelope and the NU rib arrangement. The NJ 314 ECP carries one rib on the inner ring and locates the shaft in one direction, and the NUP 314 ECP adds a loose rib ring and locates it in both; both fit the same shaft and housing and change the axial location, so they are related sizes.