MECHANICAL INTERCHANGEABLE ANVIL MICROMETER
swissprec.com
•
Adjustment if deviation in excess of 0.002
＂
/ 0.05 mm:
Use the supplied wrench to loosen the pressure ratchet (8). Lightly tap the end of the
pressure ratchet to loosen the thimble (7) from the spindle taper. Rotate the thimble (7)
until the zero is in alignment with the sleeve (6) base line. Carefully tighten the pressure
ratchet (8) ensuring that the zero position is correct.
Measuring Procedure:
To measure the work piece, rotate the thimble (7) until both anvils (2) make contact with
the feature being measured. Rotate the pressure ratchet (8) or friction thimble (not shown)
between 1 to 1.5 revolutions to ensure that the measuring anvils (2) are correctly seated. If
the measurement cannot be read in this position lock the spindle lock (5) and carefully
remove the micrometer from the work piece and observe the reading.
Parallax Error:
Parallax error refers to a deviation in the reading caused by not viewing the micrometer
at right angles to the base line on the sleeve (6)
Calibration:
It is recommended that this precision measuring tool be calibrated at a periodic interval
as follows:
•
Annually
•
At an interval that ensures that the accuracy is not compromised between
calibration intervals
•
As outlined in your company’s quality manual
Changing Anvils and ensuring Zero Setting:
Remove the anvil retainer nut (1) from the frame (3). Insert the desired
interchangeable anvil (2) into the frame (3). Replace the anvil retainer nut (1)
loosely onto the frame (1). Align the pins of the anvil torque device (11) to
the holes in the retainer nut (1). Tighten the anvil retainer nut (1) with the
anvil torque device (11). Use the thimble (7) to open the anvils to accept
the appropriate mic standard (9). Place the guide rings (12) over the mic
standard (9) leaving enough room for the assembly to fit between the
micrometer anvils. (2)&(4). Slide the guide rings (12) in the outer direction so
that they are each centered where the micrometer anvils (2)&(4) make
contact with the mic standard (9). Use the pressure ratchet to close the
micrometer spindle (4) until it makes contact with the mic standard (9). Turn
the pressure ratchet 1 to one 1.5 turn to ensure that the correct
measurement can be taken. Observe the zero line on the thimble (7) to
ensure that it is on the base line of the sleeve (6). If necessary make
adjustment as per special instruction 2.
Zero Setting:
Clean both anvils with a clean cloth to ensure both anvils are free of
contamination. Rotate the spindle (4) by the pressure ratchet (8) until both
anvils are both touching or making contact with the micrometer standard
for micrometers larger than 0 to 1 inch range. Ensure that the zero on the
thimble (7) is in alignment with the base line on the sleeve (6).
•
Adjustment of deviation less than 0.002
＂
/ 0.05 mm:
Use the wrench supplied to rotate the sleeve (6) until the zero on the
thimble (7) aligns with the base line on the sleeve.
