There is an increasing significance of screw helical and worm gears that combine use of steel and plastics. This is shown by diverse and continuously rising use in the automotive and household appliance
industries. The increasing requirements for such gears can be
explained by the advantageous qualities of such a material combination in comparison with that of the traditional steel/bronze pairing.
Surface coatings or finishing processes are the future technologies
for improving the load carrying capacity of case hardened gears. With
the help of basic tests, the influence of different coatings and finishing
processes on efficiency and resistance to wear, scuffing, micropitting,
and macropitting is examined.
Companies around the world are learning to embrace the environment, and the gear industry is no exception. This special section takes a look at how some gear manufacturers are doing
their part to conserve resources, preserve and protect the environment, and give back to the land. What we’ve found is that adopting environmental
measures is far more than just good
corporate citizenship. For many gear industry companies, good environmental practices also turn out to be good for the bottom line.
For a high-speed gearbox, an important part of power losses is due to the mesh. A global estimation is not possible and an analytical approach is necessary with evaluations of three different origins of power losses: friction in mesh contact, gear windage and pumping effect between teeth.
Flexibility and productivity are the keywords in today’s grinding operations. Machines are becoming
more flexible as manufacturers look
for ways to produce more parts at a
lower cost. What used to take two
machines or more now takes just one.
The aim of our research is to clearly show the influence of defects on the bending fatigue strength of gear teeth. Carburized gears have many types of defects, such as non-martensitic layers, inclusions, tool marks, etc. It is well known that high strength gear teeth break from defects in their materials, so it’s important to know which defect limits the strength of a gear.
Recent breakthroughs in profile grinding software are helping Anderson Precision Gears and others meet wind power’s insatiable appetite for faster
production of large, high-quality gears.
“The gear marketplace is a global marketplace.” Bill Bradley says it easily, with no special emphasis. The vice president of AGMA’s technical division sees the statement as an obvious fact.
As the international business community grows closer together, the
need for understanding differences between national and international
gear rating standards becomes increasingly important for U.S. gear
manufacturers competing in the world market.