What are BSF's standard tolerances?

  1. Fabricated Pump Motor Adaptors shall be machined within the following tolerances:
    1. Finished mounting face to finished mounting face shall be nominal dimension, - 0.060", +0.060".
    2. Pilot diameter concentricity of one end flange with the opposite end flange shall be within 0.003" TIR.
    3. Parallelism of one end flange mounting face with the mounting face of the opposite end flange shall be within 0.003" TIR. for diameters up to 18" and within 0.005" TIR for diameters up to 27"
    4. Flatness of the mounting surface of each end flange shall be within 0.003" TIR.
  2. The following tolerances apply unless otherwise specified above or on the print form.

STANDARD BSF TOLERANCE CHART
INCH DIMENSIONS

Fractional:

0/0

+/- 1/32" on machined parts

One Place Decimal:

0.0

+/- 0.030

Two Place Decimal:

0.00

+/- 0.010

Three Place Decimal:

0.000

+/- 0.005

Limits on angular dimensions:

+/- 1/2°
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