In the case of control with a bushing gauge, the product is considered fit if its end face coincides or lies between the control plane and the leading edge of the first risk facing the control plane of the caliber.
At the same time, this caliber controls the symmetry of the planes of the foot and its length. In this case, the plane of the foot of the product should be parallel to the plane A of the caliber sleeve and not protrude
it, and the end of the flat part of the foot from the side of the small base of the cone should either not reach, or coincide with the edge (facing the control plane of the caliber) of the second risk.
When controlling with a plug gauge of types, a product is considered suitable if its end face coincides or is located between the front edges of the plug gauge patterns.
At the same time, the gauge plug controls the symmetry of the plane of the window of the inner cone. In this case, the plane of the foot of the gauge plug should be parallel to the plane of the window of the product, without touching it.
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Oscar Wilde .