TOPICS CALENDAR BUYER'S GUIDE AGMA

Fatigue

INDUSTRY NEWS | 2023-04-27

KISSsoft Offers FKM Shaft Strength Calculation

In the KISSsoft shaft calculation, the proof of fatigue strength can be performed by generating an equivalent stress verification according to the FKM Guideline.

TECHNICAL ARTICLES | 2023-03-21

Ball Bearing Inner Ring Fits and Creep

I think I spend more time talking about ball bearings today than at any other time in my career. Ball bearings have always had a large place in automotive, but not typically in high demand positions—other than a few niche areas. High demand positions, such as axles and planetaries, were typically reserved for tapers, needles and cylindricals. The landscape is changing quickly.

INDUSTRY NEWS | 2022-07-11

MESYS Software Version 06/2022 is Available

A new version of the MESYS shaft and rolling bearing analysis software including new functionality is available. The bearing analysis software allows the calculation of the load distribution within the bearing and bearing life according to ISO/TS 16281 and it is integrated in a shaft system calculation with additional possibilities like modal analysis, strength calculation for shafts and interfaces to gear calculations. Currently the software is used by customers in 30 countries on four continents.

INDUSTRY NEWS | 2022-05-13

SEGULA Technologies and Senseye Partner on IIoT Solutions

SEGULA Technologies and British scale up Senseye, specialized in predictive maintenance based on artificial intelligence, have announced the signing of a partnership.

INDUSTRY NEWS | 2022-05-12

SMT Offers Training Workshop on Improving MASTA Model Fidelity

SMT's May workshops aim to give attendees the tips and tricks needed to further improve the fidelity of the MASTA model. In this workshop, SMT engineers will go through some of the tools available including:

INDUSTRY NEWS | 2022-04-28

SMT Webinar Examines Software Tips and Tricks

SMT's latest webinar "MASTA Support - Tips, Tricks and FAQ" will take place May 4, 2022. The SMT customer support team receive queries covering all areas of MASTA, with industry 'hot topics' inevitably arising. In this webinar, SMT engineers focus on answering some of the queries that frequently make it into their support inbox.

TECHNICAL ARTICLES | 2022-02-01

Improve Thermal Performance for Ironless Brush DC and Brushless DC Motors

Designers of motor-driven systems must account for thermal issues that can hinder a system's performance and efficiency.

PUBLISHER'S PAGE | 2021-09-01

Freddie Mercury in the Show Me State

The Motion + Power Technology Expo takes place September 13-16 in St. Louis. It's going to be a different kind of trade show than most people have ever experienced.

REVOLUTIONS | 2021-03-17

A Cut Above the Rest

Micro motors put the power in pruning

Pruning is one of the most demanding jobs in the viticulture and horticulture industries. When done...

| 2020-12-10

Fenner Precision Polymers Expands Portfolio with MAV Acquisition

Fenner Precision Polymers, a Michelin Group Company, recently announced the acquisition of MAV S.p.A., an Italian company, located in Altopiano del...

| 2019-09-12

What Does the Future Hold for the Automotive Industry?

We all want to know the answer to this question as it tells us as a business where to invest our R&D development, steers us to consider what ke...

PRODUCT NEWS | 2019-03-01

Product News

The complete Product News section from the March 2019 issue of Power Transmission Engineering.

| 2018-07-16

Evolution of Cooling Tower Gearboxes

Written by: Jerome Jennings, global product manager, SPX Cooling Technologies, Inc. Industries that require process heat rejection often use fie...

| 2018-05-30

Machine Parts No Longer in Production? Solutions for Hard-to-Find Bearings and Parts

Written By: Steve Katz, President, Emerson Bearing Boston Good machinery can last a lifetime. But, replacement parts for older equipment may be ...

TECHNICAL ARTICLES | 2017-08-01

Rolling Bearing Service Life Based on Probable Cause for Removal - A Tutorial

A bearing service life prediction methodology and tutorial indexed to eight probable causes for bearing failure and removal are presented - including fatigue. Bearing life is probabilistic and not deterministic. Bearing manufacturers' catalogue (L10) bearing life is based on rolling-element fatigue failure, at which time 90% of a population of bearings can be reasonably expected to survive, and 10% to fail by fatigue. However, approximately 95% of all bearings are removed for cause before reaching their L10 life. A bearing failure can be defined as when the bearing is no longer fit for its intended purpose. For a single bearing, you can only predict the probability of a failure occurring at a designated time - but not the actual time to failure.

| 2017-05-30

Induced Axial Load

Every bearing that has a non-zero contact angle will generate an axial load as a radial load is applied. This generated load is referred to by a fe...

| 2017-05-23

There Must Be 50 Ways to Reduce a Duty Cycle (Part 2)

Welcome to Part 2 of our duty cycle journey. In the first part, we reviewed how to take a duty cycle or one block of a duty cycle and reduce it to ...

| 2017-05-08

There Must Be 50 Ways to Reduce a Duty Cycle

Man, oh man — 2017 is going to be one for the record books! My wife and I recently had the 3rd and FINAL installment of the Parker clan. A healthy ...

ASK THE EXPERT | 2017-04-01

Gear Materials

A reader wants to know how to figure out the fatigues strength, tooth root tension and other technical values of new, high-performance gear materials.

TECHNICAL ARTICLES | 2016-09-01

A Model for Rolling Bearing Life with Surface and Subsurface Survival - Tribological Effects

Until now the estimation of rolling bearing life has been based on engineering models that consider an equivalent stress, originated beneath the contact surface, that is applied to the stressed volume of the rolling contact. Through the years, fatigue surface–originated failures, resulting from reduced lubrication or contamination, have been incorporated into the estimation of the bearing life by applying a penalty to the overall equivalent stress of the rolling contact. Due to this simplification, the accounting of some specific failure modes originated directly at the surface of the rolling contact can be challenging. In the present article, this issue is addressed by developing a general approach for rolling contact life in which the surfaceoriginated damage is explicitly formulated into the basic fatigue equations of the rolling contact. This is achieved by introducing a function to describe surface-originated failures and coupling it with the traditional, subsurface-originated fatigue risk of the rolling contact. The article presents the fundamental theory of the new model and its general behavior. The ability of the present general method to provide an account for the surface–subsurface competing fatigue mechanisms taking place in rolling bearings is discussed with reference to endurance testing data.

FEATURE ARTICLES | 2016-08-01

IMTS 2016 Booth Preview

A nose-in-the-tent peek at the booths featuring mechanical motion components.

FEATURE ARTICLES | 2016-06-01

Can You Develop Your Own Custom Motor-and-Motion System

In this century’s complex, ever- changing world of manufacturing, such capabilities as hardware and software expertise, effective location and distribution, business savvy and yes, even luck, are some of the cardinal requirements for running a successful business.

TECHNICAL ARTICLES | 2015-10-01

Space Shuttle Rudder-Speed Brake Actuator

The U.S. Space Shuttle fleet was originally intended to have a life of 100 flights for each vehicle, lasting over a 10-year period, with minimal scheduled maintenance or inspection. The first space shuttle flight was that of the Space Shuttle Columbia (OV-102), launched April 12, 1981. The disaster that destroyed Columbia occurred on its 28th flight, February 1, 2003, nearly 22 years after its first launch.

TECHNICAL ARTICLES | 2013-10-01

Microstepping Tutorial

This article describes the challenges involved in designing and implementing microstepping systems.

TECHNICAL ARTICLES | 2013-08-01

Preventing Fretting Fatigue in Blade Dovetail Roots by Modifying Geometry of Contact Surfaces

Dovetails, gears and splines have been widely used in aero engines where fretting is an important failure mode due to loading variation and vibration during extended service. Failure caused by fretting fatigue becomes a prominent issue when service time continues beyond 4,000 hours. In some cases, microslip at the edge of a contact zone can reduce the life by as much as 40–60 percent.

TECHNICAL ARTICLES | 2013-06-01

Alloying Strategy Boosts Powertrain Performance

The development of a new, gas-carburized gear steel, necessitated by a customer-driven specification, has not only increased the power density in an existing gearbox design, but has done so without requiring any significant change to production processes or heat treatment equipment.

INDUSTRY NEWS | 2012-10-01

Industry News

The complete Industry News section from the October 2012 issue of Power Transmission Engineering.