Materials for plastic gears

There are a number of advantages of plastic gears over metal ones. They weigh less, have lower inertia, are quieter, better resist many corrosive environments, often do not require lubrication and can be compounded with internal lubricants. They also cost less than metal ones and can incorporate ass...

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Bibliographic Details
Published in:Machine design 1995-01, Vol.67 (2), p.50-50
Main Author: Chalsma, Jennifer K
Format: Magazinearticle
Language:English
Subjects:
Advantages
Aluminum
Applications
Carbon
Component parts
Design engineering
Evaluation
Friction
Gear cutting machines
Gearing, Plastic
Lubricants & lubrication
Mechanical properties
Plastic gears
Plastics
Resins
Silicones
Temperature
Thermoplastic composites
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Summary:There are a number of advantages of plastic gears over metal ones. They weigh less, have lower inertia, are quieter, better resist many corrosive environments, often do not require lubrication and can be compounded with internal lubricants. They also cost less than metal ones and can incorporate assembly features into one design. The use of thermoplastics, however, is hampered by a lack of established load-carrying and wear data, when compared with metals, because of their relatively recent arrivals as a gear material. One value used to screen potential gear materials is the wear factor, which is calculated from a variety of tests. Unfilled nylon 6/6's wear factor of 200 is the benchmark for determining whether a composite has an acceptable wear rate. Wear factors over 200 indicate a material that has an unacceptably high wear rate and is unsuitable for gearing applications.
ISSN:0024-9114
1944-9577