R+W America's new
torque limiter, the SL Series, utilizes a proven spring-loaded ball detent
system, along with a previously patented preload for zero-backlash operation.
To achieve its target of 50-percent weight reduction, R+W embarked on a two-year
collaborative effort with local universities, designing the product from the
ground up rather than simply redesigning or optimizing existing products. The
result is a torque limiter constructed from state-of-the-art materials with
unique surface treatments and innovative assembly technology - surpassing
weight reduction targets and simultaneously reducing its footprint.
In addition to custom material specifications, specially designed spring
systems, and some improvements to the ball detent configuration, resulting in a
40 percent increase in torque capacity for a given size, the weight reduction
was also achieved through the compression of individual components.
The four sizes (Series 30 / 60 / 150 / 300) cover disengagement torque
values from 5 to 700Nm, and involve various mounting options, including both direct
and indirect drive versions. Models SLN (clamping) and SLP (keyway) attach by
flange to sprockets, sheaves, pulleys and gears, and include an integral dual-bearing
system to support belt and chain tension when properly located over the shaft. Models
SL2 (bellows coupling) and SLE (servo insert coupling) mount inline between two
independently supported shafts, such as motor to ball screw connections, and
compensate for the small but inevitable misalignment which exists in this type
of machine layout. All four types are field adjustable, and come with both
English and metric bores according to customer specifications.
What makes this movie stand out from the typical high school sports story is that the teenagers are undocumented immigrants, and the big game is a NASA-sponsored marine robotics competition. Like many other Hollywood movies, however, Spare Parts only tells part of the story. What the film shows -- and doesn’t show -- raises important issues affecting STEM education in the US.
Instead of sifting through huge amounts of technical data looking for answers to assembly problems, engineers can now benefit from 3M's new initiative -- 3M Assembly Solutions. The company has organized its wealth of adhesive and tape solutions into six typical application areas, making it easier to find the best products to solve their real-world assembly and bonding problems.
Load dump occurs when a discharged battery is disconnected while the alternator is generating current and other loads remain on the alternator circuit. If left alone, the electrical spikes and transients will be transmitted along the power line, leading to malfunctions in individual electronics/sensors or permanent damage to the vehicle’s electronic system. Bottom line: An uncontrolled load dump threatens the overall safety and reliability of the vehicle.
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.