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
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.
More often than not, with the purchase of a sports car comes the sacrifice of any sort of utility. In other words, you can forget about a large trunk, extra seats for the kids, and more importantly driving in snowy (or inclement) weather. But what if there was a vehicle that offered the best of both worlds; great handling and practicality?
Science fiction author Isaac Asimov may have the best rules for effective brainstorming and creativity. His never-before-published essay, "On Creativity," recently made it to the Web pages of MIT Technology Review.
Much has been made over the potentially dangerous flammability of lithium-ion batteries after major companies like Boeing, Sony, and Tesla have grappled with well-publicized battery fires. Researchers at Stanford University may have come up with a solution to this problem with a smart sensor for lithium-ion batteries that provides a warning if the battery is about to overheat or catch fire.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.