SKFNN3038KMC4817Double Row Cylindrical Roller Bearing — 190 mm ID, 290 mm OD, 75 mm Width, 1:12 Tapered Bore, Machined Brass Cage

Product Description

What this part is

SKF NN 3038 KM/C4817 is a double row cylindrical roller bearing in the NN 30 series with a 1:12 tapered bore and a machined brass cage. Three flanges on the inner ring and none on the outer ring let the shaft move axially in both directions. The outer ring is separable. It is used as the radial support in machine tool spindles.

Decoding the designation

NN — double row cylindrical roller bearing, flanges on the inner ring, plain outer ring.

30 — dimension series 30.

38 — bore code, 38 x 5 = 190 mm bore.

K — tapered bore, taper 1:12. Radial clearance or preload is set by drive-up on the tapered spindle seat.

M — machined brass cage.

What these specs mean in practice

Bore Diameter: 190 mm. Outside Diameter: 290 mm. Width: 75 mm. Bore Type: Tapered 1:12. Number Of Rows: 2. Rolling Elements: Cylindrical Roller. Cage Material: Machined brass. Closure Type: Open.

The double row of rollers gives very high radial capacity and rigidity. Axial location comes from a companion angular contact or thrust bearing.

Quantity and configuration

Unit Quantity: 1 Pc. Complete bearing: inner ring with both roller rows and cage, and outer ring.

Interchange guidance

Same envelope, double row, 1:12 tapered bore: FAG NN3038-AS-K-M-SP, NSK NN3038K, NTN NN3038K. MPN variants: NN 3038 KM/C4817, NN3038KMC4817, NN-3038-KMC/C4817, NN-3038-K-M-C4817, NN3038. Harmonization Code: 8482.50.00.