Micro-skiving – (r)evolution of a known production process
Production of internally toothed gear wheels is possible in many different ways. Different techniques such as gashing, broaching, wire EDM, or shaving make it...
Chamfer Hobbing Tools Up
In the last few years, chamfering and deburring have gained new respect and risen to a level of importance equal to that of other...
Opportunities of Efficiency Improvement by the Use of Hydro Lubricants
1 Introduction
Although different base oil types exist in the market and are widely in use, the majority of industrial lubricants are still based on...
Advantages of flat broaching machines
A broaching machine requires precision broaching tools to increase productivity and efficiency.
New broaching tools can be expensive and difficult to customize. Continuous use quickly...
Reliability of gears: Determination of statistically validated material strength numbers
One of the most important goals when designing a gearbox is to ensure a sufficient reliability in operation. Depending on the field of application,...
Understanding the mounting distance: Crossed-axes gearing (hypoid gearing)
Mounting distance is one of the most critical design parameters in crossed-axes gearing (in hypoid gearing, spiroid gearing, and so forth). In this article,...
Integrated Approach for Gear Testing of High-Performance Clean Steels
The power density of gearboxes is continuously increased by different research activities. Besides new material developments, the cleanliness of steels comes to the forefront...
High-end coating can increase gear-cutting productivity
The machining industry’s demand for increased productivity and reduced costs continues to drive developments that focus on innovative, state-of-the-art tools and cutting materials as...
Reducing Tool Wear in Spiral Bevel Gear Machining with the Finite Element Method
Due to the complexity of spiral bevel gear machining, the cutting tools can be a significant cost of gear manufacturing. Unlike the price of...
Experimental tests to predict plastic gears’ lifetime
One of the major problems of plastic gears is the lack of data about their lifetime. Literature doesn’t contain numerous data on this subject....
Understanding the mounting distance: Intersected-axes gearing (bevel gearing)
Mounting distance is one of the most critical design parameters in intersected-axes gearing (in straight bevel gearing, spiral bevel gearing, and so forth). In...
Root cause for noise excitation in geometrically-accurate (perfect) parallel-axes gearing
Gears are extensively used to transmit a rotation from a driving shaft to a driven shaft. Depending on the gear application, various configurations of...
Using simulation to evaluate part green shape to reduce distortion during plug quenching
Determining the heat-treatment geometry (green shape) for complex gears is not a trivial task. Mass distribution becomes critical in determining the uniformity of heat...
Filling Some Gaps in Spline Design Guidelines: Centering, Friction, and Misalignment
Editor's note: At the author's request, some statements have been removed for clarity since the article was originally published in October, 2019.
International spline standards such...
Application of Finite Element Analysis for the Strain Wave Gear Tooth Surfaces Design and Modification
This paper represents the application of finite element analysis for the strain wave gear with modified conjugate tooth surfaces. The unmodified tooth profile is...
Methods to Determine Form Diameter on Hobbed External Involute Gears
In custom designs of external spur or helical gears, designers generally prefer a lower form diameter for greater transverse contact ratio. A larger root...
Design features of worm gearing composed of plastic and/or powder-metal components
This article deals with worm gearings in cases when the worm-gear pair is composed either of plastic or of powder-metal made components. The technology...
Taking deburring to the next level
Once a gear is created, deburring becomes a necessary step to ensure a gear’s accuracy. Traditionally, deburring has been done by hand, but that...
Lean Heat Treatment for Distortion Control
Controlling distortion is of key importance during the case hardening process for the production of gear components. By effective control of distortion and the...
Inspection & Metrology: ‘We must never stand still’
Small series and prototype production at ZF Friedrichshafen AG create new challenges for quality control time and again: measurement programs for new components need...
