Spur Gear

Spur Gear

The Designer is confronted with the problem of transferring power from one shaft to another while maintaining a define ratio between te velocities of rotation of the shafts. Various types of gearing have been developed for this purpose which will operate quietly and with very low friction losses. Smooth and vibration less action is secured by giving the proper geometric shape to the outline of the teeth. The proportions of the gear tooth, as well as the sizes of the teeth, have been standardized. This procedure has simplified design calculations and has reduced the required number of cutting tools to a minimum. The proper material must be selected to obtain satisfactory strength, fatigue, and wear properties. Ease pro manufacture and ease of inspection are necessary if production costs are to be kept at their lowest level. All these problems must be taken into account by the designer.

Bending Capacity of Spur Gear Teeth

It is possible, when two meshing gears have large numbers of teeth, for several pairs to be in contact simultaneously. It is customary, however, to assume that the entire load is carried by a single pair and that the load is acting through the corner or most unfavourable point on the tooth. This tooth load causes bending stresses in the material.

The force along the pressure line is considered as being applied at center line of the tooth where it is divided into radial and tangential components. The radial component causes a uniform compressive stress over the cross section, but it is customary to neglect this force when making stress computations.

Spur Gear

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Vishwakarma Iron Works
7, Vadipura, Surenda Nagar
(Gujarat) INDIA.
Ph: 02752 - 220911
E-mail : info@viwtexpart.com