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The Ikona gear tooth profile is a patented non-involute tooth profile for internal gear pairs. Gears with this profile have the following properties: the teeth are conjugate; the contact ratio is very high; there is no tip...

Spiral bevel and hypoid gear cutting technology has changed significantly over the years. The machines, tools, materials, coatings and processes have steadily advanced to the current state of the art. This paper will cover the progression from...

Dealing with carburize case hardened gear distortion and growth is a challenge for the global gear industry. Attempts started in 1978 with computer programs to calculate distortion and growth, plus residual stress distributions for a gear and...

In the early 1980s, authors from The Cincinnati Gear Company presented several technical papers comparing the gear ratings from ISO and AGMA. These comparisons showed some interesting and diverse differences in the trends when the gear geometry...

In modern gear production, simple inspection systems for quick and close by measurements help to produce high quality. The Gear RollScan method inspects all flanks of helical gears within about 1 minute. The gear RollScan system is...

Gear manufacturing without coolant lubrication is getting more and more important. Modern hobbing machines are designed to cope with dry hobbing. In the last years carbide hobs were prevailing in high-speed hobbing due to their excellent thermal...

During overhaul of a primary drive helicopter Spur Gear, which also serves as the outer race for an integral spherical bearing, magnetic particle inspection detected an approximately 0.3-inch long crack indication on the raceway surface. Subsequent metallurgical...

Dimensioning of wind turbines adequately to their expected operation loading - especially for Off- Shore- Applications with several MW output power - requires a very good knowledge of the dynamic loads of all possible operational situations. To...

Machine tool manufacturers supplying machines to the gearing world have been in existence for many years. The machines have changed and so has the acceptance criteria for the machines. Before the 1980's the criteria for virtually all...

The design process of any kind of gearing is a complex multi-step procedure; and different directions of the design and choice of parameters are possible with respect to many factors: initial requirements to the gear under design,...