SKFNN3018KTN9/SPW33Double Row Cylindrical Roller Bearing – 90 mm ID, 140 mm OD, 37 mm Width, Cylindrical Bore, W33 Lubrication Groove

Product Description

What this part is

Consolidated NN3018 P51 NA W33 is a double row cylindrical roller bearing of the NN 30 series with a cylindrical bore. Bore Diameter: 90 mm. Outside Diameter: 140 mm. Overall Width: 37 mm. Bore Type: Straight. Rolling Elements: Cylindrical Roller. Number Of Rows: 2. Closure Type: Open. Seal type: Open. Lubricant: grease or oil. Series: NN 30. Harmonization Code: 8482.50.00.

Decoding the designation

NN — double row cylindrical roller bearing with two integral ribs on the inner ring and a rib-less, separable outer ring.

3018 — dimension series 30, bore code 18, 90 x 140 x 37 mm.

W33 — annular groove and three radial lubrication holes in the outer ring.

What these specs mean in practice

Two rows of cylindrical rollers give high radial load capacity and high radial stiffness in a narrow section. The ribbed inner ring locates the rollers; the plain outer ring allows axial float of the shaft relative to the housing. The W33 groove and holes feed grease or oil directly between the roller rows.

Interchange guidance

Same-envelope 90 x 140 x 37 mm cylindrical-bore double row cylindrical roller bearings with lubrication groove: SKF NN 3018 TN9/SPW33, FAG NN3018-AS-M-SP. Precision class and clearance follow each maker’s own suffixes.