November/December 2019

Archive > 2019 > November/December 2019

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Feature Articles

The Skiving Evolution
Machine Tool Providers Discuss the Latest Benefits, Technologies and Considerations

2019 Buyers Guide
Our annual directory of products and services for the gear industry.

Technical Articles

Reverse Cutter Hand for Face Milling and Face Hobbing
Is a left-hand cutter required for a left-hand face mill part?

A Comparative Study of Polymer Gears Made of Five Materials
The wear behavior of polymer gears made of five different materials has been investigated using an existing polymer gear test rig. Step loading tests at a constant speed of 1,000 rpm were performed. Significant differences in failure modes and performance have been observed for the five polymer gear materials for gear engagements of gears, with the same material as each other.

The Application of Geometrical Product Specification (GPS) - Compatible Strategies for Measurement of Involute Gears
During the revision of ISO 1328-1:2013 Cylindrical gears — ISO system of flank tolerance classification, ISO Technical Committee TC 60 WG2 delegates discussed proposals that the standard should be modified to ensure that it is compatible with the ISO Geometrical Product Specification (GPS) series of standards (Refs. 1-3). This seems sensible because the gears are geometrical components, but after reviewing the implications, it was rejected because ISO TC 60 WG2 did not think the gear manufacturing industry was ready for such a radical change in measurement strategy. The feasibility of the implementation of gears into the GPS matrix of standards has been carried out and the results conclude that this is practical, provided some key issues related to measurement uncertainty and establishing appropriate KPIs are addressed.

Departments

Gear Technology - To Be Continued (Publishers Page)
When I started Gear Technology more than 35 years ago, my intention was to create something of lasting value for the gear industry. It was a way of giving back to the industry that had been so good to me and my family.

Product News (Product News)
The complete Product News section from the November/December 2019 issue of Gear Technology.

Calendar (Events)
The complete Technical Calendar from the November/December 2019 issue of Gear Technology.

Industry News (Industry News)
The complete Industry News section from the November/December 2019 issue of Gear Technology.

A Look at Mechanical Principles (Addendum)
Photographer/filmmaker Ralph Steiner made poetry out of a simple short film on machine components in the 1930s