November/December 2018

Archive > 2018 > November/December 2018

Download the November/December 2018 Issue in PDF format

Feature Articles

Spin City
Grinding Wheel Technology Focuses on Speed, Efficiency and Time Savings

Why Select Gear Grinding with cBN
Cubic Boron Nitride (cBN) abrasive wheels, which are a specially engineered abrasive grain referred to as a superabrasive, typically yield 2,200 - 2,500 parts per dress with one wheel lasting as long as four to six months.

Admire its Purity
As gear manufacturing techniques become more precise and demanding, there is a growing demand for cleaner, higher quality steel.

Buyers Guide
The 2018 Gear Technology Buyers Guide was compiled to provide you with a handy resource containing the contact information for significant suppliers of machinery, tooling, supplies and services used in gear manufacturing.

Technical Articles

The Influence of a Grinding Notch on the Gear Bending Strength Rating
To achieve the requested quality, most gears today are ground. The usual grinding process includes treating the gear flank but disengaging before reaching the root rounding area. If the gear is premanufactured with a tool without protuberance, then at the position where the grinding tool retracts from the flank a grinding notch in the tooth root area is produced. Such a notch may increase the bending stresses in the root area, thus reducing the strength rating.

PentacMono-RT: High-Performance Face Milling Cutter Heads
The theory behind the latest bevel gear cutting tools is explained in detail.

Full Contact Analysis vs. Standard Load Capacity Calculation for Cylindrical Gears
In this paper local tooth contact analysis and standard calculation are used to determine the load capacity for the failure modes pitting, tooth root breakage, micropitting, and tooth flank fracture; analogies and differences between both approaches are shown. An example gearset is introduced to show the optimization potential that arises from using a combination of both methods. Difficulties in combining local approaches with standard methods are indicated. The example calculation demonstrates a valid possibility to optimize the gear design by using local tooth contact analysis while satisfying the requirement of documenting the load carrying capacity by standard calculations.

Departments

Free Knowledge Served Daily (Publishers Page)
Technical articles have been the hallmark of Gear Technology since we first started publishing, more than 34 years ago, in 1984. One of the achievements Iâ??m most proud of is the development of the GT LIBRARY at geartechnology.com, where you can find every single one of those articles, going all the way back to the beginning.

Product News (Product News)
The latest product news for the gear industry, including new products and services from Gleason, Liebherr, Forest City Gear, GMTA, Starrett and Kennametal.

Calendar (Events)
The complete Technical Calendar from the November/December 2018 issue of Gear Technology.

Industry News (Industry News)
The complete Industry News section from the November/December 2018 issue of Gear Technology.

Safety Guaranteed (Addendum)
Regular readers of Gear Talk, our bi-weekly gear blog courtesy of Charles Schultz, know that he is extremely passionate about building an educational library and keeping detailed records in order to best transfer a companyâ??s gear knowledge from one generation to the next. While we adhere to this in the pages of Gear Technology, itâ??s worth noting that technical journals, magazines and 1,800 page bevel gear textbooks are not the only way to learn a little something about this great industry of ours.