ASME B89.1.13:2001 pdf free download

ASME B89.1.13:2001 pdf free download.MICROMETERS.
4.1 Materials
The materials used for the component parts of a micrometer shall meet the minimum requirements for hardness, stability, and strength.
4.2 Resolution
Micrometers using the inch system shall read to the least count of 0.001 in., 0.0(X)l in.. or 0.00005 in. Micromctcrs using the metric system shall read to 0.01 mm. 0.002 mm. or 0.001 mnni.
4.3 Finish
The surface of graduated parts shall have a satin chrome or dull. nonglare finish. All other exposed paris not utilized as measuring components shall be coated to prevent corrosion. Exposed surfaces of measuring components shall have a ground finish with surface roughness not to exceed 32 in. (0.8 urn) Ra. except where otherwise specified within this document.
4.4 Identification Marking
In addition to other markings. instruments shall be marked in a permanent and legible manner with the manufacturer’s name or trademark so that the part number, range of the instrument, and the source of the manufacturer can he readily determined.
4.5 Adjustments
Each instrument shall be adjustable to compensate for wcar on the measuring faces and/or wear between the screw portion of the spindle and the nut.
4.6 Micrometers Screw Spindle
The screw spindle material shall be stabilized, precision-ground. and have a hardness not less than 62 on the Rockwell C Scale. The fit between the spindle and its bearings, including the nut, shall he free-turning without perceptible backlash, end shake, or side shake.
4.7 Measuring Faces
All measuring faces shall be hardened to not less than 62 on the Rockwell C Scale.
4.8 Graduations
The graduatiomis shall have the depth reduced below the surface of the component carrying the graduations and shall be of contrasting color. Variations in width of the graduated lines on the thimble and fiducial line on the barrel shall not exceed 0.001 in. (0.025 mm).
5 OUTSIDE MICROMETERS (SEE FIG. 1)
5.1 Frame
The frame shall be shaped to permit the measurement of a cylinder having a diameter equal to the maximum capacily of the micrometer caliper. The cross section design and the frame material shall he such that when a force of 2 lb for inch-reading micrometers. or 10 N for metric-reading micrometers. is applied to the anvil end of the frame parallel to the spindle axis, the flexure of the frame shall not exceed the tolerances specified in Table I or 2.
5.2 Measuring Faces
For outside micrometers with flat measuring faces, the maximum Harness error allowable shall not exceed 40 iin. (I pin) for each face. The maximum flatness error allowable for both faces shall not exceed the maximum parallelism error allowable for a given range as stated in Table I or 2. Surface finish shall not exceed 4 ILin. (0.1 i.m) Ru.
5.3 Maximum Permissible Error
With the micrometer set to read zcw at minimum travel, the error of indication. parallclism of the spindle face to the anvil face, and misalignment between anvil and spindle shall not exceed the maximum values indicated in Table I or 2 at any poirn within the measuring range of’ the iflstniment.