The SHF-2A-GR high-accuracy harmonic-drive gear reducer features a large hollow shaft and can be incorporated into a custom housing to achieve an optimum package size. The design is both axially shorter and lower in weight, and uses the "S" tooth profile. Gear reduction ratios of 50:1 through 160:1 are available in a single stage. The large hollow shaft enables the user to pass shafting, wire bundles, or other components directly through the gearing's center.
HD Systems Inc., 89 Cabot Ct., Hauppauge, NY 11788, FAX (516) 231-6803.
Although plastics make up only about 11% of all US municipal solid waste, many are actually more energy-dense than coal. Converting these non-recycled plastics into energy with existing technologies could reduce US coal consumption, as well as boost domestic energy reserves, says a new study.
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