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Sunday, 24 November 2013

By Adding lead

By Adding lead Points : By Adding lead, Using Balancing Segments
  1. Remove some of the abrasive material beneath the flanges on the light side of the wheel. Avoid remover too much material in one spot. It is better to make two or three small cavities rather than one large one. Cavities should be placed a. short distance apart so as to distribute the added weight.
  2. Fill the holes thus made with melted lead.
  3. Remove excess lead so that the flanges will fit properly against the sides of the wheel.
  4. Mount the wheel on a tapered mandrel. Then place the mandrel on a support 20. Locate the mandrel midway of the Support.
  5. Give the wheel a slight push, and allow it to roll back and forth until it come to rest, which it will do with the heavy portion of the wheel at the bottom.
  6. Continue adding or removing weight until the wheel is balanced. This will be evident when the wheel rolls to a gentle stop with no apparent tendency to roll backward.
Using Balancing Segments
  1. Mount the wheel on a tapered mandrel; then place the mandrel on a support such as illustrated in. Locate the mandrel about midway of the support:
  2. Give the wheel a very slight push, and allow it to roll back and forth until it comes to rest, which it will do with the heavy portion of the wheel at the bottom.
  3. Move the balancing segments in the direction of the light side of the wheel then test as before.
  4. Continue adjusting the balancing segments until the wheel is balanced. This will be evident when the wheel rolls to gentle stop with no apparent tendency to roll backward.
Note: Lack of balance, if serious, will involve the risk of the wheel bursting due to the stresses set up, but on precision grinding operation small out of balance effects on the accuracy of the surface and the finish produced.

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