January 19, 1998 Design News
Useful technology for your idea
A patented seal, well accepted in the racing industry,
protects the spherical bearing of rod ends from contamination.
The design features a neoprene-rubber seal that is chemically
bonded to an aircraft quality washer at 320F and 8,000
psig. The seal encapsulates the bearing and flexes accordingly
with any change in angularity.
Designed to keep grease in, and dirt and water out,
other applications include dirt cars, industrial machinery,
or lawn and garden equipment. The seal is impervious
to gasoline, oils, and most other common fluids, and
plating on the steel washer protects it from corrosion.
Skip Matczak, Seals-it, 364 Tolland St.,
East Hartford, CT 06108; FAX: (860) 528-6552.
Although the turnbuckle has been used for centuries,
its evolution still continues. This short, in-line device
uses coaxial male and female eyebolt fittings to reduce
length and weight.
Providing adjustable latitude for applications with
limited space, the device also has a locking system.
After adjustment, two screws tighten the frame around
the eyebolt shafts to inhibit rotation.
Gim Shek Ng, NASA Langley Research Center,
MS 431, 1 North Dryden St., Hampton, VA 23681-0001;
Power-off motor brake
What happens when you run a load up the "Z"
axis, and cut power? Without a stepper/servo with a
brake, the load crashes. Designed to mount on the front
end of a stepper or servo motor, this power-off brake
uses permanent magnets to hold the load in the absence
of power or voltage.
Compact and powerful, this stepper/servo brake (SSB)
employs dual, pre-loaded, sealed bearings on the output
flange to sustain large overhung loads. SSB offers fast
response times with zero backlash, and uses an O-ring
on the input flange to meet IP65 splashproof and dustproof
SSB takes only minutes to install, and comes in NEMA
23, 34, and 42 sizes. Available in 24 and 90V dc, the
SSB has a black anodized aluminum housing.
Feather Foster, Electroid Co., 45 Fadem
Rd., Springfield, NJ 07081; (973) 467-8100.