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In this issue of the Mechanical Monthly Newsletter there are
articles on springs that preload double-nuts, new metal-polymer plain
bearings, and springs for drivelines.
The highlighted products are flanged linear ball bushings,
quick-turnaround ball screws, and feed and idler rollers.
Be sure to check out the industry update to find out how motion cables
extend the reach of hand tools.
Thanks for reading and have a wonderful day!
-- Julie Kalista
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Spring preloads double-nut
The Series 1510 miniature precision ball screw from (Steinmeyer Inc.,
Burlington, Mass., comes with a double nut preloaded by a spring between
the two nuts. This compensates for torque variations due to inaccurately
ground threads. It also compensates for wear over time, so the ball
screw continuously delivers smooth motion with near-constant idling
torque. The standard nut has a cylindrical body with an attaching
thread.
Full Article
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Plain bearings shake a leg
New metal-polymer plain bearings helped solve a wear problem in
precision joints that let patients relearn how to walk. The joints are
part of a framework called an orthosis. Computer-controlled motors in
the orthosis move the patient's hip and knee joints through walking
motions on a treadmill. Engineers who developed the orthosis at Hocoma
AG in Switzerland noted that bearings in the hip and knee joints were
wearing out quickly. The original metal-polymer bearings were designed
to run dry. But the lubricating polymer layer was wearing away,
introducing too much play into the joints which are perpendicular to
their rotation axis.
Full Article
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Components for Drivelines: Springs
Most mechanical-drive systems use springs and parts such as
retaining clips and spring washers. Although relatively small and
inexpensive, these components are often critical to the reliable
performance of a drive system.
Full Article
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Flanged linear ball bushings
Flanged linear ball bushings now come in a
self-lubricating version said to reduce the need for maintenance and
extend life. Flanges may be round, square, or compact with predrilled
mounting holes. Users can choose from 52100 bearing steel, with or
without nickel plating, and 440C stainless steel. Other options include
low-dust versions for clean-room applications and sealless versions.
Operating temperatures from −4 to 248°F are tolerated
depending on material of construction.
More Information:
Misumi USA Inc.
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Quick-turnaround ball screws
Compact FA ball screws are now manufactured in the
U.S. for delivery in one to two weeks. Sizes include 25-mm shaft
diameters and smaller, and they can be ordered with an optional
maintenancefree K1TM lubrication unit. A new Compact FA catalog outlines
available sizes and part numbers.
More Information:
NSK Precision America
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UPCOMING IN-PERSON EVENTS
Design-2-Part Shows are America's longest running and most trusted
events for sourcing custom parts and services.
Ten shows covering the country offer OEMs, engineers and purchasing
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Linear Analysis Training Class
February 11-15, 2008
Students will be shown demonstrations of how to set up, analyze, and
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UPCOMING WEBCASTS
Power Transmission Technologies:
The Advantages and Applications of Belt Drive Solutions
Sponsored by Gates Corporation
DATE: February 19th, 2008
TIME: 2:00pm ET
Today's designers choose from a variety of technologies for
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Customization for the Competitive
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DATE: March 5th, 2008
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DATE: April 2nd, 2008
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ARCHIVED WEBCASTS AVAILABLE FOR FREE VIEWING
Click Here for a list of archived Machine Design
webcasts.
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Hand tools get an extended reach thanks to
motion cables
High-power density nut runners can now be 200 ft away from their
controls without losing a signal, thanks to custom-made motion cables.
Designers at Ingersoll-Rand were redesigning their QE Series of tools
when they found that no standard cabling could support 200-ft runs
without losing power or digital signals data. So IR eventually turned to
cable maker Leoni Elocab Ltd. in Ontario to custom build cables for its
tools. Leoni Elocab prototyped and te ste d a 12.9-mm cable for power
and data.
Full Article
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9 Plastic Gear MAQs Booklet from UFE
UFE's FREE Parts SmartsTM booklet "The
9 Plastic Gear Must Ask Questions" addresses fundamental questions to
consider when designing plastic gears.
Download your copy today!
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Contact Information
Editorial questions: Julie Kalista
216-931-9458
Advertising/sponsorship opportunities: Virginia Goulding
216-931-9893
Machine Design
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