Thorium: The key to cheap, clean nuclear
Thorium-based liquid reactors could be more efficient and create
less waste than today’s uranium-based generating plants. Liquid fuel
has significant theoretical advantages in operation, control, and
processing over solid fuel, but a basic question had to be answered:
“Will it work?”
Ringfeder Power Transmission’s Gerwah
TRANSMISSION's full line of Gerwah RING-flex® couplings are
available in single or double and close-coupled flexing designs for
torques up to 500,000 lb-ft and shafts up to 11” in diameter.
Completely maintenance free and no lubrication required, these
long-lasting, torsionally rigid disc couplings operate without wear in
high temperature environments. RING-flex® couplings are available in
four, six, and eight-bolt designs to accommodate a wide variety of
connections in pumps, conveyors, printing presses, fans and generators,
or anywhere else a backlash-free connection is required. Unique designs
are available including: flange-mounted, close-coupled, high-speed, and
Please contact us for information on RING-flex® couplings and other
Tips for choosing the best mechanical
Mechanical couplings connect and transfer rotary motion and torque
between rotating shafts. Although the concept is elementary, selecting
the right coupling may not be. Here are some common mistakes and how to
LEE SPRING 2010 CATALOG INTRODUCES
UNIQUE PRODUCTS; EXPANDS OFFERING
2010 Stock and Custom Catalog offers two innovative product lines
featuring technically advanced corrosion-resistant materials and unique
designs: LeeP™ Plastic Composite Springs and Bantam™ Mini
Compression Springs. Lee has also added smaller diameter REDUX™
Wave Springs and Compression Instrument Springs and an expanded
selection of Lee’s Standard Stock Compression Springs. Lee’s Catalog
is available both online and in print featuring over 17,000 distinct
designs. Custom products are available, supported by Lee’s experienced
A simple way to measure shaft rpms
Engineers often want to monitor a shaft’s rotational speed but get
bogged down trying to get sensors, signal conditioners, cabling, and
bulky housings to work together. A new shaft tachometer solves these
Linear actuator for lighter loads
The HepcoMotion PSD80 Profile screw-driven linear actuator features
high-efficiency Herculane wheels, which mount to an adjustable carriage.
The unit can have single or multiple carriages and handle loads to 500
N. Actuation is provided by a stainless-steel leadscrew with pitch
ranges of 4, 15, 25, and 70 mm. The 25-mm lead is useful in Z-axis
applications, while the 70-mm screw pitch handles higher speed
pick-and-place requirements and allows speeds to 1 m/sec and thrust
loads to 300 N. Available in left and right-hand threads, the leadscrew
offers smooth, strong, and precise actuation. For greater positioning
accuracy, a ball screw is available.
The PSD80 comes as a closed or open format, depending on application
requirements. The closed unit is rugged, tolerant of debris, and has
many mounting options while the open version is compact, light, and has
Safety couplings provide overload
Mechanically operated Torq Tender overload safety couplings
disengage loads when torque exceeds preset ratings. The couplings
protect motor and drive systems from jam ups and excessive loading.
Models are available for torques from 2 to 3,000 lb-in. A 12-page
catalog covers selection and ordering information.
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Editorial questions: Stephen Mraz
Advertising/sponsorship opportunities: Virginia Goulding
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