Hartford
Technologies' line of Drawn Cup Needle Bearings consist of a stamped outer shell, cage and needle rollers. Drawn Cup Needle
Bearings are similar to standard roller bearings, except for a smaller
diameter-to-length ratio, which allows them to fit tight envelopes. By
controlling the clearance between the rollers, rollers are kept parallel to the
axis of the shaft. The major advantage that
needle bearings offer is that they operate with rolling motion, rather than sliding
motion. As a result, friction is less, the torque required to rotate the
shaft is lowered, less heat is generated and lubrication is simplified. The bearing wear is substantially
reduced.
Hartford Drawn Cup Needle Bearings have a low cross section
design and are manufactured in chrome steel
and low carbon steel in sizes as small as 3 mm I.D by 6.5mm O.D. The
bearings are typically open at both ends and Sealed Drawn Cup Needle Bearings
are sealed at one end and are often used for shaft end mounting. The seal keeps
the lubricant or non-pressurized oil from migrating, and prevents contamination
of the raceway areas. Material options for Hartford bearings include chrome steel and low carbon steel; bearings
can be supplied in lots as small as 500 pieces.
Applications are diverse and range from
2-stroke engines to towel dispensers. Other applications include automotive steering
columns, outboard motors, power tools, appliances, office equipment and air compressors.
