5 measures to reduce gear interference

Steps to eliminate interference:

  1. Use of a larger pressure angle can eliminate interference. Having a larger pressure angle results in a smaller base circle. As a result, more of the tooth profiles become involute. In this case, the tip of the tooth of one gear will not have a chance to contact the flank of the other gear on its non-involute portion.
  2. Interference can be eliminated by under-cutting of tooth. A portion of teeth below the base circle is cut off. When teeth are produced by this process, the tip of one tooth of a gear will not contact the non-involute portion of the tooth of other gear, hence, elimination of interference. However, if the undercutting is pronounced, the undercut tooth is considerably weakened.
  3. Elimination of interference is possible by tooth stubbing. In this process a portion of the tip of the teeth is removed, thus preventing that portion of the tip of tooth in contacting the non-involute portion of the other meshing tooth. In this case also, the teeth are weakened.
  4. Increasing the number of teeth on the gear can also eliminate the chances of interference. Increasing number of teeth, keeping the diameter same makes teeth smaller and reduces the tendency to interfere
  5. Increasing slightly the center distance between the meshing gears would also eliminate interference.

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