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Description / Abstract:
Scope and Application.
This standard presents definitions of terms applying to fits between
plain (non-threaded)
cylindrical parts and makes recommendations on preferred sizes,
allowances, tolerances, and fits
for use wherever they are applicable. The standard through 20 in.
diameter is in accord with the
recommendations of American-British-Canadian Conferences. Experimental
work is being carried on and
when results are available, agreement in the range above 20 in. will
be sought. It represents the
combined thinking and experience of groups who have been interested in
standards in this field, and
it should have application for a wide range of products. The
recommendations, therefore, are
presented for guidance and for use where they might serve to improve
and simplify products,
practices, and facilities.
Many factors, such as length of engagement, bearing load, speed,
lubrication, temperature,
humidity, surface texture, and materials, must be taken into
consideration in the selection of fits
for a particular application, and modifications in these
recommendations might be required to
satisfy extreme conditions. Subsequent adjustments might also be
desired as the result of
experience in a particular application to suit critical functional
requirements or to permit
optimum manufacturing economy. Selection of departure from these
recommendation will depend upon
consideration of the engineering and economic factors that might be
involved.