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Choose your preferred unit to view instructions online or download the PDF for offline use.
Example:
Make certain the tape and object to be measured are both clean.
Each line on the gage member represents .025” of diameter, while each line on the vernier
represents .001”.
Wrap the tape around the object to be measured. Place the gage member section through the window on the
vernier section. The vernier scale should be just below the gage member. Tighten
the tape around the object with 5 pounds tension.
Locate the “zero” on the vernier scale and note the highest value achieved on the gage member above it (the
highest value to the left of the zero). In this example, the value is 20.050”.
Next, observe the vernier scale’s value at the point where it lines up exactly with a marked division line on the
gage member. In this example, the value is 15 (.015”).
Finally, to obtain the diameter of the object, simply add the two values together:
20.050” + .015” = 20.065”.
As a suggestion for checking very large diameters – pieces of masking tape can be used to hold the tape in the
proper parallel position.
Tape resolution 0.001″
Example:
Make certain the tape and object to be measured are both clean.
Each line on the gage member represents .5mm of diameter, while each line on the vernier represents .01mm.
Wrap the tape around the object to be measured. Place the gage member section through
the window on the vernier section. The vernier scale should be just below the gage member.
Tighten the tape around the object with 5 pounds tension.
Locate the “zero” on the vernier scale and note the highest value achieved on the gage member above it (the
highest value to the left of the zero). In this example, the value is 672.5mm.
Next, observe the vernier scale’s value at the point where it lines up exactly with a marked division line on the
gage member. In this example, the value is 18 (0.18mm).
Finally, to obtain the diameter of the object, simply add the two values together:
672.5mm + 0.18mm = 672.23mm
As a suggestion for checking very large diameters – pieces of masking tape can be used to hold the tape in the
proper parallel position.
Tape resolution 0.01mm
Access all Pi Tape® measurement resources in one place — PDFs, videos, and reference materials for every tape type, size, and unit.
Whether you need standard precision measuring tapes or custom solutions for unique applications, our team is ready to help you find the perfect measurement tool.
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