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World's first mechanical digital
watch
De Grisogono announces the creation of the world's first entirely
mechanical digital watch. Made from at least 651 individual components,
only 354 watches will be produced, half in titanium and half in
gold.
Full article
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Hydrodynamic pressure bearings
The S99HDPM Series of hydrodynamic pressure bearings consist of
seven bearings with IDs ranging from 1 to 6 mm and speeds of 6,000 to
20,000 rpm.
The bearings are formed by stacking "petal-shaped" laminated
aluminum-silicon alloy plates. Housed in a stainless-steel case with a
polyurea-thickened grease containing antioxidant and anticorrosion
additives, the inner faces of the plates act as the bore of the
assembled bearing. As the shaft rotates, fluid between the shaft guide
and the shaft generates pressure as a result of this "squeeze effect"
— a phenomenon of generating pressure to a lubricating membrane in
a fluid lubrication when wall faces are close to each other.
More Information:
Stock Drive Products
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Mini polymer bearings
Two new mini polymer bearings have been added to the igubal
spherical-bearing family. The mini plain bearing requires minimal
installation space. The self-aligning bearing is light and compact,
requires no lubrication, is simple to install, and adapts to angular
misalignments.
The bearings are housed in igumide G - a reinforced polymer. The
internal spherical ball is constructed of iglide L280 polymer for
minimum friction with the shaft.
The rotational, swiveling, and oscillating movements of the
self-supporting shaft take place within the spherical cap, which has a
dampening effect.
More Information:
igus Inc.
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Parallel-shaft/helical-bevel
gearboxes
The HDP parallel shaft and HDO right-angle heavy-duty gearboxes
handle applications with torque ratings to 640,000 lb-in.
Designed using finite-element analysis and multibody simulations, the
gearboxes feature structural rigidity and gear geometry for optimized
load capacity and gear/bearing life. Structural simulations based on
boundary-element-method analysis helped minimize noise and vibration
levels.
More Information:
Bonfiglioli
USA
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Smart gearbox
The integration of torque and force sensors directly into servogear
reducer housings lets users monitor mechanical loads, including torque,
shear force, speed thermal load, wear, and backlash. This method, called
the alphaIQ solution, allows for accurate measurement of torque, axial
loading, and radial loading. All variables are displayed on a PC with
included software. The technology can be added to any current
motion-control system and can also be used to close the torque loop of a
control system at the output. Machine life can be accurately measured
by determining the loads and forces present at the drive mechanism.
More Information:
alpha gear drives, US
Wittenstein Group
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UPCOMING IN-PERSON EVENTS
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2008 Online Manufacturing WebExpo & Conference
Presented by New Equipment Digest and Machine Design
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TIME: 9:00 am - 5:00 pm ET
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ARCHIVED WEBCASTS AVAILABLE FOR FREE VIEWING
Click Here for a list of archived Machine Design
webcasts.
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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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