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Green ball bearing part number system

How to read GREEN ball bearing numbers:
EXAMPLE: 77038X1

77038X1 77 - 2 shields
038 - Basic bearing number
X - Standard end play or internal fit-up
1 - ABEC-1 tolerance

Part number system

PrefixSuffixDefinition
.1ABEC-1 TOLERANCES.
.3ABEC-3 TOLERANCES.
.5ABEC-5 TOLERANCES.
.7ABEC-7 TOLERANCES.
.DBPAIR OF BEARINGS GROUND FOR DUPLEX MOUNTING BACK-TO-BACK.
.DFPAIR OF BEARINGS GROUND FOR DUPLEX MOUNTING FACE-TO-FACE.
.DTPAIR OF BEARINGS GROUND FOR DUPLEX MOUNTING IN TANDEM.
.LLIGHT PRELOAD, ANGULAR CONTACT TYPE BALL BEARING.
.LLOOSE END PLAY, RADIAL TYPE BALL BEARING.
.L2EXTRA LOOSE FIT-UP, SINGLE-ROW, RADIAL.
.LILOOSE FIT-UP, SINGLE-ROW, RADIAL.
.LRLOOSE RADIAL PLAY, ANNULAR BALL BEARING.
.MRMEDIUM RADIAL PLAY, ANNULAR BALL BEARING.
.NEXTRA LOOSE END PLAY, RADIAL TYPE ANNULAR BALL BEARING.
.RRETAINING RING FOR REAR WHEEL BEARING.
.SSPECIAL END PLAY, RADIAL TYPE ANNULAR BALL BEARING.
.THEAVY PRELOAD, ANGULAR CONTACT TYPE ANNULAR BALL BEARING.
.TTIGHT END PLAY, RADIAL TYPE ANNULAR BALL BEARING.
.TLTIGHT FIT-UP, SINGLE-ROW, RADIAL.
.XMEDIUM PRELOAD, ANGULAR CONTACT TYPE ANNULAR BALL BEARING.
.XSTANDARD END PLAY, RADIAL TYPE ANNULAR BALL BEARING.
.XRSTANDARD RADIAL PLAY, ANNULAR BALL BEARING.
4.SNAP RING.
7.1 SHIELD.
77.2 SHIELDS.
8.ONE SEAL .
88.TWO SEALS.
9.ONE SYNTHETIC CONTACT SEAL .
9090.FRONT WHEEL BEARING, COMPLETE.
9095.INNER RING ., (CONE) ONLY, FRONT WHEEL BEARING.
9096.OUTER RING (CUP) ONLY, FRONT WHEEL BEARING.
9097.RETAINER AND BALL ASSEMBLY ONLY, FRONT WHEEL BEARING.
99.TWO SYNTHETIC CONTACT SEALS.
CB.CLUTCH BEARING.
CBCCLUTCH BEARING AND CARRIER ASSEMBLY.
G.SPECIAL BEARING (E.G. G-5111) .
PB.DIRECT MOUNTED BALL BEARING PILLOW BLOCK.
RW.REAR WHEEL BEARING.
SA.SELF ALIGNING PILLOW BLOCK.
TR.PRECISION TROLLEY WHEEL (E.G. TR-7) .
WC.WIDE CUP TYPE SEALED ANNULAR BALL BEARING.

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