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Home » Topics » Manufacturing » Machine Tools » Maintenance

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Tooth Contact Shift in Loaded Spiral Bevel Gears

November 1, 1992
An analytical method is presented to predict the shifts of the contact ellipses on spiral bevel gear teeth under load. The contact ellipse shift is the motion of the point to its location under load. The shifts are due to the elastic motions of the gear and pinion supporting shafts and bearings. The calculations include the elastic deflections of the gear shafts and the deflections of the four shaft bearings. The method assumes that the surface curvature of each tooth is constant near the unloaded pitch point. Results from these calculations will help designers reduce transmission weight without seriously reducing transmission performance.
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1992 Marks Important Gear Design Milestone: Lewis Bending Strenth Equations Now 100 Years old

November 1, 1992
Columbus' first voyage to the Americas is not the only anniversary worthy of celebration this year. In 1892, on October 15, Wilfred Lewis gave an address to the Engineer's Club of Philadelphia, whose significance, while not as great as that of Columbus' voyage, had important results for the gearing community. In this address, Lewis first publicly outlined his formula for computing bending stress in gear teeth, a formula still in use today.
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Industry Forum

November 1, 1985
One of the current research activities here at California State University at Fullerton is systematization of existing knowledge of design of planetary gear trains.
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New Techniques for Aligning and Maintaining Large Ring Gears

September 1, 1985
This paper presents two new techniques for aligning and maintaining large ring gears. One technique uses lubricant temperature analysis, and the other uses stop action photography.
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