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SKF - Rolling Bearings

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5 Cylindrical roller bearings<br />

Designation system<br />

Group 1 Group 2 Group 3 /<br />

Prefixes<br />

E2. <strong>SKF</strong> Energy Efficient bearing<br />

L<br />

Separate inner or outer ring of a separable bearing<br />

R<br />

Inner or outer ring with roller and cage assembly of a separable bearing<br />

Basic designation<br />

Listed in diagram 2 († page 43)<br />

HJ<br />

Angle ring<br />

Suffixes<br />

Group 1: Internal design<br />

EC<br />

CV<br />

Optimized internal design incorporating more and/or larger rollers and with<br />

modified roller end / flange contact<br />

Modified internal design, full complement roller set<br />

Group 2: External design (seals, snap ring groove etc.)<br />

ADA Modified snap ring grooves in the outer ring; two-piece inner ring held together by a retaining ring<br />

(for bearings in the NNF 50 series)<br />

ADB ADA + modified internal design<br />

DA<br />

Modified snap ring grooves in the outer ring; two-piece inner ring held together by a retaining ring<br />

(for bearings in the 3194.. series)<br />

K Tapered bore, taper 1:12<br />

N<br />

Snap ring groove in the outer ring<br />

NR<br />

Snap ring groove in the outer ring, with appropriate snap ring<br />

N1<br />

One locating slot (notch) in one outer ring side face<br />

N2<br />

Two locating slots (notches) in one outer ring side face, 180° apart<br />

-2LS Contact seal, PUR, on both sides<br />

Group 3: Cage design<br />

J<br />

JA<br />

JB<br />

M<br />

MA<br />

MB<br />

MH<br />

ML<br />

MP<br />

MR<br />

P<br />

PA<br />

PH<br />

PHA<br />

V<br />

VH<br />

Stamped steel cage, roller centred<br />

Sheet steel cage, outer ring centred<br />

Sheet steel cage, inner ring centred<br />

Machined brass cage, riveted, roller centred<br />

Machined brass cage, riveted, outer ring centred<br />

Machined brass cage, riveted, inner ring centred<br />

Machined brass cage, window-type, inner ring centred<br />

Machined brass cage, window-type, inner or outer ring centred, depending on bearing design<br />

Machined brass cage, window-type, inner or outer ring centred, depending on bearing size<br />

Machined brass cage, window-type, roller centred<br />

Glass fibre reinforced PA66 cage, roller centred<br />

Glass fibre reinforced PA66 cage, outer ring centred<br />

Glass fibre reinforced PEEK cage, roller centred<br />

Glass fibre reinforced PEEK cage, outer ring centred<br />

Full complement of rollers (no cage)<br />

Full complement of rollers (no cage), self-retaining<br />

602

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