Double row cylindrical roller bearing built for machine tool spindle duty, tapered bore, 110 mm bore, 170 mm outside diameter, 45 mm width.
Decoding the designation
NN3022 — SKF double row cylindrical roller bearing in the NN30 spindle series, ISO envelope 110 x 170 x 45 mm.
K — 1:12 tapered bore, mounted directly on a matching tapered spindle journal with no adapter sleeve.
M — machined brass cage.
C4 — C4 internal clearance, greater than normal.
What these specs mean in practice
Bore Diameter: 110 mm. Outside Diameter: 170 mm. Overall Width: 45 mm. Number Of Rows: 2. Rolling Elements: Cylindrical Roller. Bore Type: Tapered. Cage Material: Machined brass. Internal Clearance: C4. Closure Type: Open. Bearing Material: Bearing Steel. Two rows of cylindrical rollers on a tapered bore that mounts directly on the spindle taper carry radial load with high stiffness and running accuracy suited to machine tool spindles.
Interchange guidance
FAG NN3022-AS-K-M-SP, NSK NN3022MBKRCC1P4 and NTN NN3022K share the 110 x 170 x 45 mm envelope and tapered-bore double-row cylindrical design.
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