Gear Design Checklist

November 15, 2002

The larger gear in a pair is called the gear, the smaller is called the pinion.

Gear ratio: The number of teeth in the gear divided by the number of teeth in the pinion. Also, ratio of the speed of the pinion to the speed of the gear. In reduction gears, the ratio of input to output speeds.

Gear efficiency:Ratio of output power to input power. This includes consideration of power losses in the gears and bearings and from windage and churning of lubricant.

Speed: In a given gear, normally limited to a specific pitchline velocity. Speed capabilities can be increased by improving accuracy of the gear teeth and by improving balance of the rotating parts.

Power: Load and speed capacity is determined by gear dimensions and by type of gear. Helical and helical-type gears have the greatest capacity (to approximately 30,000 hp). Spiral bevel gears are normally limited to 5,000 hp, and worm gears are usually limited to about 750 hp.

Want to use this article? Click here for options!
© 2012 Penton Media Inc.

Comments

gear design

On July 13th, 2010 NITIN GUPTA (not verified) says:

The information on this page is not enough these are general definitions. Is there any place where I could find the design process for designing the Industrial gears and gear trains.

reply

Gear Design

On January 18th, 2012 Srinivasan C Iyer (not verified) says:

There are multitude of IS standards available. For beam strength and contact stress wear, you may refer to IS:4460. You may also refer to CMTI handbook for Gear Correction reasons and methodology. CMTI also illustrates gear teeth measurement and accuracies.
From your name I take you to be an Indian hence the references to Indian Standards.