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Home » Topics » Design » Contact Pattern

Contact Pattern
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ANCA Provides Complete Skiving Cutter Solution for EV Transmissions

April 26, 2021
Matthew Jaster
No Comments

ANCA's TX and MX machines offer skiving cutter sharpening


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Further Modifications

May 22, 2018
Charles D. Schultz
No Comments
You might be thinking this conversation would logically move to other tooth modifications. Gear Technology has and will c...
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Worm Basics - Part 2

March 22, 2018
Charles D. Schultz
No Comments
Continuing our discussion of the “least you need to know” about worm gearing: 5. Efficiency is highly variable for worms. If it is critical to y...
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Worm Gear Efficiency Estimation and Optimization

June 1, 2016
This paper outlines the comparison of efficiencies for worm gearboxes with a center distance ranging from 28 - 150 mm that have single reduction from 5 to 100:1. Efficiencies are calculated using several standards (AGMA, ISO, DIN, BS) or by methods defined in other bibliographic references. It also deals with the measurement of torque and temperature on a test rig — required for the calibration of an analytical model to predict worm gearbox efficiency and temperature. And finally, there are examples of experimental activity (wear and friction measurements on a blockon- ring tribometer and the measurements of dynamic viscosity) regarding the effort of improving the efficiency for worm gear drivers by adding nanoparticles of fullerene shape to standard PEG lubricant
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Importance of Contact Pattern in Assembly of Bevel vs Cylindrical Gears

August 1, 2014
Dr. Hermann J. Stadtfeld
Why is there so much emphasis on the tooth contact pattern for bevel gears in the assembled condition and not so for cylindrical gears, etc?
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KISSsoft Offers Contact Patterns of Five-Axis Milled Gears

November 6, 2013
The five-axis milling of gears is an established manufacturing process in the field of short run and replacement parts. This manufacturi...
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How to Design and Install Bevel Gears for Optimum Performance - Lessons Learned

June 1, 2013
Bevel gears must be assembled in a specific way to ensure smooth running and optimum load distribution between gears. While it is certainly true that the "setting" or "laying out" of a pair of bevel gears is more complicated than laying out a pair of spur gears, it is also true that following the correct procedure can make the task much easier. You cannot install bevel gears in the same manner as spur and helical gears and expect them to behave and perform as well; to optimize the performance of any two bevel gears, the gears must be positioned together so that they run smoothly without binding and/or excessive backlash.
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Pitting Resistance of Worm Gears: Advanced Model for Contact Pattern of Any Size, Position, Flank Type

October 1, 2012
An experimental and theoretical analysis of worm gear sets with contact patterns of differing sizes, position and flank type for new approaches to calculation of pitting resistance.
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Refurbishing a Ball Mill ; Bevel Gear Backlash

September 1, 2012
Our experts comment on reverse engineering herringbone gears and contact pattern optimization.
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Longitudinal Tooth Contact Pattern Shift

May 1, 2012
After a period of operation, high-speed turbo gears may exhibit a change in longitudinal tooth contact pattern, reducing full face width contact and thereby increasing risk of tooth distress due to the decreased loaded area of the teeth. But this can be tricky—the phenomenon may or may not occur. Or, in some units the shift is more severe than others, with documented cases in which shifting occurred after as little as 16,000 hours of operation. In other cases, there is no evidence of any change for units in operation for more than 170,000 hours. This condition exists primarily in helical gears. All recorded observations here have been with case-carburized and ground gear sets. This presentation describes phenomena observed in a limited sampling of the countless high-speed gear units in field operation. While the authors found no existing literature describing this behavior, further investigation suggests a possible cause. Left unchecked and without corrective action, this occurrence may result in tooth breakage.
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