Quck answer
A dial bore gauge is a precision tool used to measure the diameter of a hole. To read a dial bore gauge, follow these steps:
1. Insert the gauge into the hole and ensure it is seated properly.
2. Turn the dial to zero, aligning the needle with the reference mark.
3. Slowly rotate the gauge inside the hole, feeling for any resistance.
4. Read the measurement on the dial when the gauge is fully inside the hole.
5. Take multiple readings at different positions to ensure accuracy.
6. Record the measurements and compare them to the desired specifications.
By following these steps, you can effectively read a dial bore gauge and obtain accurate measurements of hole diameters.
A dial bore gauge is commonly employed by machinists to measure the internal diameter of bores in motor engines. According to Tresna Instruments, the expense associated with bore gauges means that they are typically only found in the possession of professionals. If you are able to afford one, the speed and precision of a dial bore gauge can greatly save time when used for measuring cuts or hole sizes in home renovation projects. Utilize a dial bore gauge in the same manner as any other indicator-type measuring device.
Step 1
Position the bore gauge in a micrometer locked to the exact diameter of the hole being measured.
Step 2
Turn the dial on the indicator until the pointer aligns with the “0” mark on the dial face.
Step 3
Insert the dial bore gauge into the bore, ensuring that both anvils of the gauge make contact with the wall. Gently rock the bore gauge back and forth while keeping the anvils aligned along the same axis plane. The pointer will swing either clockwise or counter-clockwise as the anvils settle into place perpendicular to the bore.
Step 4
Observe the dial face once the tool is properly aligned. Eventually, the pointer will begin to reverse itself and move in the opposite direction. This may occur on either side of the “0” mark on the indicator. Take note of the measurement where the pointer reverses itself and remove the bore gauge from the hole.
Step 5
Add or subtract the recorded value from the target number that the indicator was calibrated to. For example, if the bore gauge’s indicator was zeroed to 2 inches, and the pointer changed direction at the .007-inch mark on the dial face, the final measurement of the hole is 2.007 inches. Alternatively, if the pointer moved counter-clockwise and changed direction .007 inches to the left of the “0” on the indicator, the final measurement of the hole is 1.993 inches.
