Wednesday, August 12, 2020
Archives April 2014


April 2014


Company Profile: Griffin Gear

With their competitive pricing and shorter delivery times, Griffin Gear has definitely staked its claim in the larger gear sector.

“We’ve made gears from the beginning,” said Randy Stewart, president of Griffin Gear Inc. “Joe Griffin, Sr., who started the business in 1967, was originally involved with a family foundry business. We started out as a company that did a little of everything, but then began our focus on gearing.” Located in Roebuck, SC in […]
Gear Solutions Magazine

The Anatomy of a Lubrication Erosion Failure: Causation, Initiation, Progression, and Prevention-Part II

A discussion of detailed destructive metallurgical evaluations of a specific lubrication erosion failure, which the authors have conducted in order to analyze and characterize the failures.

As a result of our evaluation of the pit type defects observed on all of the Cameron Pinion Shaft teeth, DST offers the following proposed mechanism of failure. Failure Mechanism a. The semi-circular rough, somewhat shiny surface pit type defect present on each Pinion tooth was the result of cavitation erosion. Cavitation is defined as […]
William Flynn, Raymond J. Drago, Roy Cunningham

A Unique Turning Application for Gear Manufacturers

Seeing gear production as a total component solution is a more flexible, integrated approach.

From traditional hobbing machines to modern indexable carbide inserts, much has changed in gear technology over the years. As innovative solutions to previous options emerge on the gear-milling scene, shops now have unique opportunities to achieve major productivity gains. Every gear manufacturer has the same goal in mind; to produce superior gear components in the […]
Scott Lewis, Brent Marsh

Rigid, Accurate, and Dependable Workholding

Greater accuracies, faster cycle times, and better surface finishes are all byproducts of choosing the right workholding solution for gear production.

As I sit down to write this article, I realize that in one week I will have spent 35 years of my life manufacturing and designing chucks. I began working here at Speedgrip Chuck, Inc. in March 1979, shortly after leaving the military. My first position here was as a machinist, working nights while attending […]
Dave Stokely


Gear Rating vs. Percent Lower Transformation Products in Steel Gears

Consideration should be given to revise (or remove) the 90 percent lower transformation products requirement to reflect the intended benefit without creating any standard conformance/certification dilemma for the gear suppliers.

Some gear rating specifications, such as the popular the AGMA 2001, require a minimum percentage of lower transformation products (martensite, lower bainite)1  to a depth of up to 1.2 times the gear tooth length. It is believed that by maximizing the percentage of lower transformation products results in a higher achievable hardness, thus in turn […]
Michael He

Modifications in Pre-Finished Gears

A summary of the principles of gear inspection as they apply to spur and helical gearing.

Profile: These modifications are made to accommodate the characteristics of the finishing process. (Figure 1a) Chamfer: The Chamfer is meant to protect the tip of these teeth from damage during handling in its soft condition. Such nicks could effect the finishing process and also cause unnecessary rejects in inspection. (Figure 1b) Undercut: This is a […]
Ron Green

Equipment hardware with nitrogen/methanol carburizing atmosphere and the necessary utility configurations

In the March Hot Seat column, I presented the operating cost for a standard UBQ batch furnace carburizing cell processing 3000 net pounds of parts utilizing generator-produced endo gas with the following equipment configuration: • Gas fired furnace hot zone with four 8” (203 mm) diameter radiant tubes, with recuperation providing 65% efficiency • Electrically […]
Jack Titus

Trend Talks: Tim Byrd

We speak with four key members in the gear industry’s research and development community about where we are—and where we’re going.

The research and development team is sometimes thought of as the bespectacled, wild-haired folks down in the lab who come up for air just long enough to shout “Eureka!” before returning to their hole. But just as management and production have a place within a particular company, R&D is an integral part of our industry. […]
Tim Byrd

Q&A with Josh Pocock

Sales Engineer, Positrol

Positrol has a very busy R&D department. What have they been working on recently? We do quite a bit of engineering work here. Our engineers analyze each part and process and recommend the best solution. We’ve come out with different types of part sensing, specifically an LED sensing mechanism. Air sensing is the normal method, […]
Gear Solutions Magazine


Koepfer America Becomes First North American Exclusive Distributor for C.L.C. Heavy-Duty Gear Machines

Koepfer America, L.L.C. has announced its partnership with C.L.C. SRL as the manufacturer’s first exclusive distributor in North America. C.L.C., of Cadelbosco Sopra, Italy, manufacturers a wide range of heavy-duty machines for hobbing (vertical and horizontal) and shaping of gears from 200 mm to 2000 mm (8” up to 78”) in diameter. The C.L.C. product […]
April 14, 2014

Seco Tools’ Carbide Recycling Program Highlights Company’s Sustainability Focus

Seco Tools, LLC has released the results of its North American Carbide Recycling Program for 2013. The company collected and processed 125,919 lbs. (57,235 kg) of used carbide tools. Of the total, 110,585 lbs. (50,265 kg) were returned to Seco Tools AB for processing into grade powder. Over the life of the carbide recycling program, […]
April 14, 2014

Ted Toth Elected NTMA Board Chairman

The National Tooling and Machining Association (NTMA) announced that Ted Toth, vice president and managing director of Rosenberger-Toth in Pennsauken, New Jersey, was elected 2014 chairman of the NTMA Board of Directors during the association’s annual meeting last week in Phoenix, Arizona.  NTMA also announced the election of Herb Homeyer, president of Homeyer Precision Manufacturing […]
April 14, 2014

PRODUCT SHOWCASE: R&P Metrology Offers Special Measuring System: RPS 11350V

Responding to specific customer requirements, R&P Metrology GmbH announced a new model in their full line of custom metrology systems, the RPS 1350V. Designed for ball screws and shaft parts, this system boasts capacity for 1,350mm between centers, and 1,300mm of vertical measuring travel. “A customer asked if we could design and build an inspection […]
April 14, 2014

PRODUCT SHOWCASE: 2014 CNC Tooling Solutions From Techniks

Indianapolis-based Techniks Inc. has released their 2014 full line catalog.  This 264-page catalog includes essential toolholders and accessories for CNC Machining Centers and CNC Routers. In addition to a wide selection of CNC tooling, also featured are tap holders, boring tools, and Techniks Certified Capto-compatible toolholders. The catalog also includes MagVISE Magnetic Workholding Chucks, EZ-Lift […]
April 14, 2014

PRODUCT SHOWCASE: Gear Consulting Group 2014 School Schedule

Gear Consulting Group’s regional courses are open to all comers on a limited class size basis. The three-day seminar is designed to give students a deeper understanding of the relationships between the geometry of the gear and the manufacturing and inspection processes, leading to a practical, logical approach to troubleshooting. In these regional courses we […]
April 14, 2014

PRODUCT SHOWCASE: Heller’s Flexibly Configured HMC’s Respond to Market Needs

With the H4500, HELLER has introduced a machine designed for robust processes while providing an affordable, economical cutting solution for limited space. The machines are also designed for energy efficiency, capable of energy savings of up to 30% compared to conventional machine designs. “The more universal and varied the machining assignment, the more important becomes […]
April 14, 2014

News of Note for German Machine Tools of America (GMTA)

  • GMTA Proudly Announces the Addition of Stefan Kloos as Product Manager, Stefan will handle the Pittler vertical turning lathes and WMZ centerdrive lathes. He will be based in Ann Arbor, Michigan, North American Headquarters for GMTA. • German Language and International Careers (LIC) students from Eastern Michigan University visited GMTA on March 12, […]
March 24, 2014