Tuesday, March 13, 2001
At the National Design Engineering show in Chicago, numerous
companies introduced new hydraulic and pneumatic products to attendees. Among
the companies introducing products were Bimba, EnerPac, and Parker Hannifin.
Bimba Mfg. Co.'s giant magneto-resistance (GMR) sensing technology
is said to be more sensitive to magnetic fields than Hall-Effect sensors in
automotive, computer, and other applications. The GMR's repeatability is 0.002
inch. Repeatability of Hall-effect sensors is 0.015. The GMR technology is based
on a discovery that the direction of electron spin in certain metals can be
shifted when in the presence of a magnetic field. A GMR sensor is made from
multiple layers of a Nickel/Iron compound. Each layer is magnetically opposed to
the adjacent layer. The switch is resistant to over-voltage, reverse-polarity,
and electrical transients.
Enerpac's new modular electric pump, the Hushh 2000, is
configurable to work with electronic system controls. "The new pump has a
modular design built for demanding workholding applications," says Enerpac's
Thomas Eggert. "It also has a variety of accessories," he explains. Options and
accessories include multiple voltage options, manifolds, return-line filters,
heat exchangers, oil level/temperature switches, and pressure switches. Oil
level/temperature switches shut down the pump when the oil has reached an unsafe
operating temperature, protecting the pump and components from overheating.
Enerpac's electric pump is used in conjunction with swing cylinders, work
supports, directional valves, and sequence valves. It also has a standard
oversized filtered breather, allowing for easy reservoir fills without the need
for special tools.
New ColorGard hose from Parker-Hannifin's Parflex Div. uses a
multi-layered eleastomeric or polymeric material in contrasting colors. The
colors usually include a black outer cover with red inner layer, but other
contrasting colors can be used if desired. As the black layer wears away over
time and the hose approaches an unsafe operating condition, the red inner layer
is revealed, giving the hose inspector an early warning that it is time to
inspect the hose and consider pulling it from service. The hose's applications
include those where hoses are typically dragged across concrete and other
abrasive surfaces, such as construction and mobile equipment. ColorGard hose is
also suitable for hydraulic rescue equipment (e.g., Jaws of Life) where
inadvertent hose failures are unacceptable. In indoor industrial applications,
the hose helps end-users avoid catastrophes, injuries, clean-up expenses and
For more information, visit www.bimba.com; www.enerpac.com; and www.parker.com.