Dial Calipers

What four measurements does a dial caliper do?

• Outside diameter/Object thickness

• Inside diameter/Space width

• Step distance

• Hole Depth

How large is a standard inch dial caliper in inches

Slightly more than 6

How to measure the Outside Length with a dial caliper

Use the outside measuring faces to enclose the object to get the outside diameter

How to measure the Inside Length of a hole or slot in an object?

Place the hole in the the top caliper faces

What is stepped length?

The distance between two stepped parallel surfaces on an object

How to measure stepped length?

Use one of the inside caliper faces and the edge next to the other face.

How to measure depth of an object?

Use the depth measure (the pointy long thingy) at the end.

What is the Blade and its purpose?

It is the immovable part of the dial caliper with a slider to move the dial and indentations for measurements

What are the Dial and Pointer and their purposes?

The pointer rotates on the dial to show measurements as the slider moves across the blade.

what is the Reference Edge and its purpose?

It keeps track of larger 0.1 inch increments with indentations

What is the rack used for?

It is used to convert the linear motion with the slider to rotary motion with the pointer.

How to zero a dial caliper? What parts are used?

The dial lock is used to lock the caliper in place to prevent movement. To zero, ensure the pointer touches zero before moving the slider.

What is one full rotation of a pointer equivalent to?

one blade scale increment, which is 0.1 inches

How to find the precise diameter of this ring?

1. count the inches shown on the blade scale. 1 inch is shown.

2. count the tenths of inches shown on the blade scale. It shows 0.4.

3. Look at the hundreths number shown on the wheel. it shows 0.037 inches.

4. The pointer is slightly ahead of 0.037, so estimate the ten thousandths digits place, which is like 0.0001 inch.

   

5. Add them all up for a total of 1.4371 inches for the diameter.