Tribology

INDUSTRY NEWS | 2022-04-15

Oelheld Offers Grinding Oil Performance Benefits

Many see the fluids as an unnecessary evil to the grinding process, failing to realize that selecting the right grinding fluid can lead to significant improvements in cycle time, surface quality, finishes, secondary operations, such as tool coatings. Oelheld has put together a short article on grinding oil considerations.

INDUSTRY NEWS | 2020-08-10

Michigan Metrology Offers Online Courses in Surface Roughness, Texture and Tribology

Michigan Metrology, experts in solving problems related to surface texture, wear, finish and friction, are now offering courses in surfac...

GEAR TALK WITH CHUCK | 2019-05-09

My Story – Bob Handschuh

Most of us only think of NASA with regard to the “S” [Space] in its acronym. The first “A” [Aerospace] is just as important to its mission of s...

INDUSTRY NEWS | 2018-09-05

Hainbuch Taps Hänel for Mandrel Prototype Test

Hard work and first-class teamwork between the gear factory Hänel and Hainbuch has paid off. The new mandrel Mando G211 for gear manufacturers, sui...

GEAR TALK WITH CHUCK | 2018-08-30

Gearbox Design: Checks and Double Checks

We have been devoting this year’s blogs to fundamentals. I frequently remind my clients that the gear geometry is the easy part of gearbox design. ...

INDUSTRY NEWS | 2017-08-08

WZL Gear Conference Highlights Latest Technology

Liebherr Gear Technology Inc. recently hosted the 7^th WZL Gear Conference in the USA 2017 in Ann Arbor, Michigan. This two-day program o...

INDUSTRY NEWS | 2013-09-09

Oerlikon Shares Knowledge at World Tribology Congress

High-performance transmission specialist Oerlikon Graziano shares its extensive knowledge and innovative research techniques at the World...

FEATURE ARTICLES | 2009-01-01

Big Gears - High Standards, High Profits

Natural resources—minerals, coal, oil, agricultural products, etc.—are the blessings that Mother Earth confers upon the nations of the world. But it takes unnaturally large gears to extract them.

INDUSTRY NEWS | 2007-02-08

Two Publications from Society of Lubrication and Tribology Available

The completely revised and updated Handbook of Lubrication and Tribology, Volume I: Application and Maintenance, Second Edition, is now a...

FEATURE ARTICLES | 1997-09-01

Who's Who and What's What At Gear Expo '97

Below are listed the Gear Technology advertisers exhibiting at Gear Expo 97.

TECHNICAL ARTICLES | 1996-09-01

Gear Wear Caused By Contaminated Oils

The diagnosis and prevention of gear tooth and bearing wear requires the discovery and understanding of the particular mechanism of wear, which in turn indicates the best method of prevention. Because a gearbox is a tribologically dependent mechanism, some understanding of gear and bearing tribology is essential for this process. Tribology is the general term for the study and practice of lubrication, friction and wear. If tribology is neglected or considered insignificant, poor reliability and short life will result.

TECHNICAL ARTICLES | 1991-07-01

The Lubrication of Gears - Part III

This is the final part of a three-part series on the basics of gear lubrication. It covers selection of lubricant types and viscosities, the application of lubricants, and a case history

TECHNICAL ARTICLES | 1991-05-01

The Lubrication of Gears - Part II

What follows is Part 2 of a three-part article covering the principles of gear lubrication. Part 2 gives an equation for calculating the lubricant film thickness, which determines whether the gears operate in the boundary, elastohydrodynamic, or full-film lubrication regime. An equation for Blok's flash temperature, which is used for predicting the risk of scuffing, is also given.

TECHNICAL ARTICLES | 1991-03-01

The Lubrication of Gears - Part 1

This is a three-part article explaining the principles of gear lubrication. It reviews current knowledge of the field of gear tribology and is intended for both gear designers and gear operators. Part 1 classifies gear tooth failures into five modes and explains the factors that a gear designer and operator must consider to avoid gear failures. It defines the nomenclature and gives a list of references for those interested in further research. It also contains an in-depth discussion of the gear tooth failure modes that are influenced by lubrication and gives methods for preventing gear tooth failures.

TECHNICAL ARTICLES | 1985-01-01

The Effect of Lubricant Traction On Wormgear Efficiency

The effect of various lubricant factors on wormgear efficiency has been evaluated using a variety of gear types and conditions. In particular, the significant efficiency improvements afforded by certain types of synthetic lubricants have been investigated to determine the cause of these improvements. This paper describes broad wormgear testing, both in the laboratory and in service, and describes the extent to which efficiency can be affected by changes in the lubricant; the effects of viscosity, viscosity index improvers and, finally, synthetic lubricants are discussed. The work concludes that lubricant tractional properties can play a significant role in determining gear efficiency characteristics.