Couplings

GEAR TALK WITH CHUCK | 2018-10-16

Is it Worth Upgrading?

GEAR TALK WITH CHUCK | 2018-09-27

Acceptable Fixes

You do not always have to say “no” when confronted with non-conforming parts. Here are a few “fixes” I have been comfortable authorizing:

GEAR TALK WITH CHUCK | 2018-07-19

Gear Design: Defining the Goal

A critical ste...

GEAR TALK WITH CHUCK | 2018-06-05

Hardenability 101

Material Grade in Gears

The reason not all gears can be made from the same material grade has to do with hardenability. We have long unde...

GEAR TALK WITH CHUCK | 2015-10-06

One World Now

My Saturday morning routine now includes watching a bit of “futball” from the English Premier League. The next day an American football game was br...

GEAR TALK WITH CHUCK | 2015-07-28

Brainstorming to Better Products

Many gear companies are not in a position to develop new products but most of them could make their current products better. Business schools may p...

GEAR TALK WITH CHUCK | 2014-06-03

Failures Need Not Be Permanent

[starbox] The mailman delivered some used books to my house this week, so I expect to be blogging a bit about their content in the coming weeks....

VOICES | 2013-09-01

Letters to the Editor

Readers respond to our "Job Shop Lean" column and the "My Gear is Bigger than Your Gear" article.

VOICES | 2011-05-01

Developing Flexible Couplings Standards

AGMA Flexible Couplings committee chairman Glenn C. Pokrandt gives an update about standards and other documents under development.

TECHNICAL ARTICLES | 2010-06-01

Variation Analysis of Tooth Engagement and Load Sharing in Involute Splines

Involute spline couplings are used to transmit torque from a shaft to a gear hub or other rotating component. External gear teeth on the shaft engage an equal number of internal teeth in the hub. Because multiple teeth engage simultaneously, they can transmit much larger torques than a simple key and keyway assembly. However, manufacturing variations affect the clearance between each pair of mating teeth, resulting in only partial engagement.

INDUSTRY NEWS | 2007-05-24

Renold Introduces Interchangeable Range of Gearboxes and Couplings

Renold will exhibit its SMXtra interchangeable range of gearboxes and fluid couplings, for quarrying applications, at the Hillhead Exhibi...

PRODUCT NEWS | 2002-03-01

Product News

Complete Product News for March/April 2002.

TECHNICAL ARTICLES | 2000-05-01

A Modular Approach to Computing Spiral Bevel Gears and Curvic Couplings

In general, bevel gears and curvic couplings are completely different elements. Bevel gears rotate on nonintersecting axis with a ratio based on the number of teeth. Curvic couplings work like a clutch (Fig. 1).

PUBLISHER'S PAGE | 1999-03-01

Navigating Uncharted Waters in Cyberspace

I'd like to share with you a vision of the future. It takes place in cyberspace, and it's coming soon to a computer near you. Whether you like it or not, and whether you're ready or not, the Internet is changing the way business is conducted.

TECHNICAL ARTICLES | 1998-09-01

Comparing Standards

One of the best ways to learn the ISO 6336 gear rating system is to recalculate the capacity of a few existing designs and to compare the ISO 6336 calculated capacity to your experience with those designs and to other rating methods. For these articles, I'll assume that you have a copy of ISO 6336, you have chosen a design for which you have manufacturing drawings and an existing gear capacity calculation according to AGMA 2001 or another method. I'll also assume that you have converted dimensions, loads, etc. into the SI system of measurement.

TECHNICAL ARTICLES | 1995-11-01

Determining Spline Misalignment Capabilities

Introducing backlash into spline couplings has been common practice in order to provide for component eccentric and angular misalignment. The method presented here is believed to be exact for splines with even numbers of teeth and approximate for those with odd numbers of teeth. This method is based on the reduction of the maximum effective tooth thickness to achieve the necessary clearance. Other methods, such as tooth crowning, are also effective.

FEATURE ARTICLES | 1992-11-01

1992 Marks Important Gear Design Milestone: Lewis Bending Strenth Equations Now 100 Years old

Columbus' first voyage to the Americas is not the only anniversary worthy of celebration this year. In 1892, on October 15, Wilfred Lewis gave an address to the Engineer's Club of Philadelphia, whose significance, while not as great as that of Columbus' voyage, had important results for the gearing community. In this address, Lewis first publicly outlined his formula for computing bending stress in gear teeth, a formula still in use today.

INDUSTRY NEWS | 1992-03-01

Our Experts Discuss Hobbing Ridges, Crooked Gear Teeth, and Crown Shaving

Question: When cutting worm gears with multiple lead stock hobs we find the surface is "ridged". What can be done to eliminate this appearance or is to unavoidable?

TECHNICAL ARTICLES | 1989-07-01

A New Method of Designing Worm Gears

The first part of this article describes the analytical design method developed by the author to evaluate the load capacity of worm gears. The second part gives a short description of the experimental program and testing resources being used at CETIM to check the basic assumptions of the analytical method; and to determine on gears and test wheels the surface pressure endurance limits of materials that can be used for worm gears. The end of the article compares the results yielded by direct application of the method and test results.

VOICES | 1988-07-01

Industry Forum

Letters to the editor on a variety of subjects, including couplings, gear planers and ausforming.

VOICES | 1987-11-01

Viewpoint

Letters to the editor covering a variety of subjects, including computers in gear design, couplings and more.

VOICES | 1987-07-01

Viewpoint

In the May/June Issue of your excellent magazine. Mr. Stan Jakuba discusses a serious problem, not only for the gear industry, but any machinery where fluctuating torque is encountered. I would like to make the following comments to his article...

FEATURE ARTICLES | 1987-05-01

Give Your Gears a Break - Select the Right Coupling!

How important is the right choice of coupling in determining successful machine design? Consider the following example. A transmission of appropriate size was needed to transfer the speed of the engine driver to that of the driven generator. The transmission was properly selected and sized to endure the rated power requirements indefinitely, but after only a short time in operation, it failed anyway. What happened? The culprit in the case was a coupling. It provided the necessary power and protection against misalignment but it lacked the ability to isolate the gears from the torque peaks of the diesel engine.

TECHNICAL ARTICLES | 1986-11-01

Curvic Coupling Design

Curvic Couplings were first introduced in 1942 to meet the need for permanent couplings and releasing couplings (clutches), requiring extreme accuracy and maximum load carrying capacity, together with a fast rate of production. The development of the Curvic Coupling stems directly from the manufacture of Zerol and spiral bevel gears since it is made on basically similar machines and also uses similar production methods. The Curvic Coupling can therefore lay claim to the same production advantages and high precision associated with bevel gears.