Hardness

INDUSTRY NEWS | 2019-01-31

Buehler Expands Universal Hardness Tester Range

Buehler is excited to announce their latest addition to the Wilson hardness testing range, the new UH4000 Series Universal Hardness Tes...

INDUSTRY NEWS | 2018-12-21

Buehler Offers DiaMet Hardness Software Upgrade for Legacy Hardness Testers

Buehler, an ITW company has announced that the DiaMet hardness software upgrade is now available for legacy Wilson testers. The DiaMet Ha...

INDUSTRY NEWS | 2018-11-15

Beautiful on the Inside

Higher Quality Internal Gears

GEAR TALK WITH CHUCK | 2018-09-25

Reworking Questions

The most important consideration in deciding whether to rework or scrap and re-make a nonconforming part is functionality. Can the part be made to ...

GEAR TALK WITH CHUCK | 2018-09-20

Frequently Asked Questions

Backlash “adju...

GEAR TALK WITH CHUCK | 2018-08-02

Gearbox Specs: Connecting to the System

Your specifica...

GEAR TALK WITH CHUCK | 2018-07-03

Planetary Gears: Inside Information

The Story So Far

GEAR TALK WITH CHUCK | 2018-06-21

Gear Materials: More Inside Heat Treating Trivia

In our last bl...

GEAR TALK WITH CHUCK | 2018-06-20

Gear Materials: You Don’t Know What You Don’t Know

Before we leave our study of materials, I want to share a few thoughts on heat treating, lab tests, and hardness testing. When you start working wi...

GEAR TALK WITH CHUCK | 2018-06-14

Options for Material Selection

Disclaimer: This is the policy I follow for material selection. Your situation may call for a different decision. You should not adopt this pol...

GEAR TALK WITH CHUCK | 2018-06-07

Material Grade in Gears

GEAR TALK WITH CHUCK | 2018-06-05

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 | 2018-05-24

The Right Stuff

Even the most brilliant gear design will fail if the wrong material is used to make the parts. Our understanding of metallurgy and alloying element...

INDUSTRY NEWS | 2018-02-16

Mitutoyo America HR-530 Rockwell Hardness Testers Features Unique Electronic Control and Inside Ring Hardness Testing

Mitutoyo America Corporation is pleased to announce the release of the latest Rockwell Hardness Testers in its HR-530 Series, including t...

INDUSTRY NEWS | 2018-01-05

Buehler Quick Ship Program Delivers Rockwell Hardness Test Blocks Next Day

Buehler has introduced a Quick Ship program for the popular Wilson certified Rockwell hardness test blocks. For ultimate accuracy an...

TECHNICAL ARTICLES | 2018-01-01

Globalization's Effect Upon Gear Steel Quality

Background on the development of a high-speed, automatic hardness tester for gear steels.

GEAR TALK WITH CHUCK | 2017-11-28

Department of Corrections

It was brought to my attention that the graphics used in my recent “herringbone” postings actually show double helical gears. I have a great suppor...

INDUSTRY NEWS | 2016-08-02

Phase II Ultrasonic Hardness Tester Provides Portable Measurement of Both Hard and Soft Metals

This handheld device allows the measure of hardness on small, large, flat, round, thin or thick workpieces. This rugged metal body unit i...

INDUSTRY NEWS | 2016-01-14

Walter Prototyp Advance Line Offers Balance of Hardness and Toughness

Walter has introduced its new Prototyp Advance line of solid carbide milling tools for universal application. The new Advance milling cut...

GEAR TALK WITH CHUCK | 2014-10-16

Publish or Perish

[starbox] My very first posting in this space was a call for papers for the 2013 AGMA Fall Technical Meeting. I had just gotten home from Arlingto...

VOICES | 2014-09-01

Leading by Example - Remember When

In January of this year we at Gear Technology got hip to the fact-in un-hip, belated fashion - that we needed a Blog Site and someone to do the blogging. Lucky for us, we already had that someone right here - in plain sight. That someone was Charles D. Schultz, P.E.

GEAR TALK WITH CHUCK | 2014-08-14

The Problem of Certainty

[starbox] In writing about unforeseen consequences there is a risk of inspiring such conservatism in design that the resulting product is no lon...

INDUSTRY NEWS | 2013-05-01

Hardness Testing

This back-to-basics article describes the main methods used for hardness testing of gears: Rockwell, Brinell, Vickers and Knoop.

TECHNICAL ARTICLES | 2010-11-01

Zerol Bevel Gears: Tribology Aspects in Angular Transmission Systems, Part III

Zerol bevel gears are the special case of spiral bevel gears with a spiral angle of 0°. They are manufactured in a single-indexing face milling process with large cutter diameters, an extra deep tooth profile and tapered tooth depth.

INDUSTRY NEWS | 2007-02-14

Newage Testing’s Microhardness System Contains Multi-Specimen Fixture and Positioning Tables

Newage Testing Instruments' introduced the new model CAMS-MSO multi-specimen microhardness testing system. The system can handle...

INDUSTRY NEWS | 2006-04-19

Marposs? New Gear Tester Detects Correct Tooth Hardness

The E59n from Marposs is a mechanical system where the gears are loaded and correctly referred before being tested. The integrated eddy c...

PRODUCT NEWS | 2005-09-01

Corus New Gear Steels Reduce Alloys Without Sacrificing Achievable Hardness

Corus Engineering Steels' formula for its new gear steels: Maintain achievable hardness while using fewer alloys, thereby cutting steel costs for gear manufacturers.

PRODUCT NEWS | 2003-07-01

Product News

Complete Product News for July/August 2003.

FEATURE ARTICLES | 1999-11-01

Coordinate Measuring Machines and the Gear Industry

Gears are extremely complex shapes. Coordinate measuring machines, or CMMs, are designed to measure complex shapes. It seems to follow that CMMs world, therefore, be the ideal tool for measuring gears. But the answer is not so simple.

FEATURE ARTICLES | 1999-03-01

Metallurgical Aspects to be Considered in Gear and Shaft Design

In his Handbook of Gear Design (Ref.1), Dudley states (or understates): "The best gear people around the world are now coming to realize that metallurgical quality is just as important as geometric quality." Geometric accuracy without metallurgical integrity in any highly stressed gear or shaft would only result in wasted effort for all concerned - the gear designer, the manufacturer, and the customer - as the component's life cycle would be prematurely cut short. A carburized automotive gear or shaft with the wrong surface hardness, case depth or core hardness may not even complete its basic warranty period before failing totally at considerable expense and loss of prestige for the producer and the customer. The unexpected early failure of a large industrial gear or shaft in a coal mine or mill could result in lost production and income while the machine is down since replacement components may not be readily available. Fortunately, this scenario is not common. Most reputable gear and shaft manufacturers around the world would never neglect the metallurgical quality of their products.

INDUSTRY NEWS | 1993-07-01

Gear Tip Chamfer and Gear Noise; Surface Measurement of Spiral Bevel Gear Teeth

Could the tip chamfer that manufacturing people usually use on the tips of gear teeth be the cause of vibration in the gear set? The set in question is spur, of 2.25 DP, with 20 degrees pressure angle. The pinion has 14 teeth and the mating gear, 63 teeth. The pinion turns at 535 rpm maximum. Could a chamfer a little over 1/64" cause a vibration problem?

TECHNICAL ARTICLES | 1992-01-01

Design Guidelines for High-Capacity Bevel Gear Systems

The design of any gearing system is a difficult, multifaceted process. When the system includes bevel gearing, the process is further complicated by the complex nature of the bevel gears themselves. In most cases, the design is based on an evaluation of the ratio required for the gear set, the overall envelope geometry, and the calculation of bending and contact stresses for the gear set to determine its load capacity. There are, however, a great many other parameters which must be addressed if the resultant gear system is to be truly optimum. A considerable body of data related to the optimal design of bevel gears has been developed by the aerospace gear design community in general and by the helicopter community in particular. This article provides a summary of just a few design guidelines based on these data in an effort to provide some guidance in the design of bevel gearing so that maximum capacity may be obtained. The following factors, which may not normally be considered in the usual design practice, are presented and discussed in outline form: Integrated gear/shaft/bearing systems Effects of rim thickness on gear tooth stresses Resonant response

PUBLISHER'S PAGE | 1990-03-01

Capital Gains, Societal Gains, or No Gains At All

Taxes may be one of the only two sure things in life, but that doesn't make them popular. Nobody is happy to pay them, and the bigger the amount due, the unhappier the taxpayer. Conversely, politicians know that coming out in favor of a tax cut is the equivalent of voting for apple pie and motherhood. It's a sure-fire success at the ballot box.

EVENTS | 1988-11-01

Technical Calendar

November 1-3. SME Gear Processing and Manufacturing Clinic, Sheraton Meridian, Indianapolis, IN. November 5-10. international Conference on Gearing, Zhengzhou, China

TECHNICAL ARTICLES | 1987-11-01

Computer Aided Design for Gear Shaper Cutters

Computer programs have been developed to completely design spur and helical gear shaper cutters starting from the specifications of the gear to be cut and the type of gear shaper to be used. The programs generate the working drawing of the cutter and, through the use of a precision plotter, generate enlarge scaled layouts of the gear as produced by the cutter and any other layouts needed for its manufacture.

TECHNICAL ARTICLES | 1987-09-01

Effects of Hob Quality and Resharpening Errors on Generating Accuracy

The modern day requirement for precision finished hobbed gears, coupled with the high accuracy characteristics of modern CNC hobbing machines, demands high tool accuracy.

VOICES | 1987-07-01

No Surprise

For the last few years, the market has been tough for the U.S. gear industry. That statement will cause no one any surprise. The debate is about what to do. One sure sign of this is the enormous attention Congress and the federal government are now placing on "competitiveness."

PUBLISHER'S PAGE | 1987-01-01

Industry Shows Shift Emphasis

A change has taken place within the industry that is going to have an enormous effect on the marketing, sales, and purchasing of gear manufacturing and related equipment. This change was the American Gear Manufacturers' Association, first biennial combination technical conference and machine tool minishow.

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.

TECHNICAL ARTICLES | 1986-05-01

Identification of Gear Noise with Single Flank Composite Measurement

Anyone involved in the design, manufacture and use of gears is concerned with three general characteristics relative to their application: noise, accuracy, and strength or surface durability. In the article, we will be dealing with probably the most aggravating of the group, gear noise.

Hardness

Pushed to the Maximum

Higher Quality Internal Gears

The Story So Far

Material Grade in Gears

Material Grade in Gears