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Features

Supplier Relationships Speed Gearbox Delivery

At Stober Drives, customer orders are filled in the fast lane. The company turns around more than 93 percent of requests for its MGS™...

Measuring Excellence in Polymer Gearing

At Kleiss we refer to polymer gear making as a “subtle science and exacting art,” and 20 years of experience has shown that a...

Reducing Gear Whine in Planetary Gear Transmissions

Gear whine is an annoyance for automotive consumers. For all practical purposes it cannot be eliminated, but only minimized. Gear whine stems from transmission...

Selecting the Right PFPE Lubricant

If a mechanical or electromechanical component has to function for extended periods in an extreme environment, a perfluoropolyether (PFPE) lubricant just may be the...

The Rules for Successful Rotary Broaching

The process of rotary broaching has been around for a long time, but there are still many machinists in the field who have never...

Microgeometry and Bias in Helical Gear Noise Excitations

The prediction of gear noise may normally be treated as a classical source/path/receiver problem. Usually the excitation occurs in the gear mesh and the...

Case Study: Allison Transmission Test Drives Gleason Genesis

Somewhere in Europe a driver is enjoying his new Renault refrigerated truck, and the particularly quiet, smooth–shifting automatic transmission running beneath him. Little does...

Low-Cycle Bending Fatigue of AISI 9310 Steel Spur Gears

An investigation of the low-cycle bending fatigue of spur gears made from AISI 9310 gear steel was completed. Tests were conducted using the single-tooth...

Natural Frequencies & Modal Properties of Compound Planetary Gears

This paper presents the structured vibration mode and natural frequency properties of compound planetary gears of general description, including those with equally-spaced planets and...

A Revelation in Advanced Software Technology

Bryant Grinder has always been at the forefront of grinding machine technology. Founded in Springfield, Vermont, in 1909, the company has the distinction of...

Direct Design for High-Performance Gear Transmissions

This paper presents a unique methodology for designing gears to enhance strength and life while allowing size and wear reduction. This new approach, trade...

Straight Bevel Gears on Phoenix Machines Using Coniflex Tools

Manufacturing of straight bevel gears was in the past only possible on specially dedicated mechanical machines. Such machines are by nature difficult to set...

The Team Approach to Precision Plastic Gearing

Since antiquity, gears and gear systems have constantly been developed and improved. This continuing process includes the evolution of plastic gears, which started out...

Heat Treating Heavy-Duty Gears

Whether required to pace the movement of a precision watch or a giant wind turbine, gears play an essential role in the performance of...

Synthetic Lubricants for Real Results

For centuries lubricants have been utilized as a way to reduce friction and wear on moving parts. In 2005, approximately 40 million tons of...

Estimating Gear Fatigue Life

Fatigue failure of gears can lead to the catastrophic failure of equipment, taking into account that gears are important elements in the power transmission...

A Solid State of Affairs

Testing for the Evaluation of the Oils Lubricants are essential in maintaining the condition of fixed or mobile assets. Any degradation in the lubricant’s properties...

Surface Hardening: Hard Turning or Grinding?

Hard turning and grinding are competing finishing processes for the manufacture of precision mechanical components such as bearings, gears, cams, etc. Surface hardening at...

Planetary Gear Parametric Instability

Parametric instability is investigated for planetary gears where the fluctuating stiffness results from the changing contact conditions at the multiple tooth meshes. The time-varying...

Face-off: Face Hobbing vs. Face Milling

Less than 10 years ago the selection of machinery was a system decision; presently continuous indexing (face hobbing) and single indexing (face milling) are...