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A four-piece trailer wheel bearing kit built around the 44643/44610 tapered roller bearing size: two sealed bearings and two non-sealed ones. The 1-inch bore and 1.98-inch outer diameter fit common small trailer hubs, and the tapered design carries radial and axial loads together. The split cone-and-cup construction lets you mount the inner assembly separately from the outer ring, which simplifies repacking and seating. It suits trailer owners doing a full axle rebuild who want one box with both sealed and open bearings.
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Lowest price we've seen: $19.00 on Nov 13 at Bolton Engineering. Tracked across 1 store since Nov 13.
It includes two sealed bearings (44643L/44610) and two non-sealed bearings (44643/44610).
Tapered roller bearings have tapered inner and outer ring raceways and tapered rollers. The raceway projection lines meet at a common point on the bearing axis, which gives true rolling and low friction. The design handles combined loads, meaning radial and axial loads acting at the same time.
Axial load capacity increases with the contact angle. A larger calculation factor e means a larger contact angle. Single row tapered roller bearings are separable, so the inner ring with roller and cage assembly (cone) can be mounted separately from the outer ring (cup). A single row bearing is typically adjusted against a second tapered roller bearing.
