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March/April 2010
FEATURES
C O N T E N T S
31 Why Vacuum Carburizing?
Heat treat alternative is unconventionally
effective.
37
Hybrid Economy, NASCAR
Performance:
VMT’s positively engaged, infinitely
variable transmission provides gas
savings, speed to burn.
TECHNICAL ARTICLES
45
New Developments in Gear Hobbing
A look at upgrades in tool materials, process technology
and process integration.
54
The Road Leads Straight to Hypoflex
Dry cutting straight bevel gears goes mainstream.
59
High-Temperature Testing of Stanyl Plastic
Gears:A Comparison with Tensile Fatigue
Strength
Testing documents material’s performance in absence
of standards.
Vol. 27, No. 2 GEAR TECHNOLOGY, The Journal of Gear Manufacturing (ISSN 0743-6858) is published monthly, except in February, April, October and December by Randall Publications LLC,
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GEARTECHNOLOGY March/April 2010 www.geartechnology.com