|Problems in Internal Grinding:|
|Bell mounted hole||
Over travel of wheel.
|Reduce over travel of wheel from hole. About one half the wheel surface should still remain in the hole|
|Spindle loose||check for axial play.|
|Tapered hole||Be sure wheel head is parellel with table traverse.|
|Hole out of round.||work may have been distorted in clamping it or the rotating fixture may be out of balance . Heating of roughing out may have distorted.||Loose the clamp before grinding & tighten them up again.|