You'll find 101 uses for it!
A Digital Caliper is a precision measuring device to easily and accurately measure objects. It is especially useful for measuring round objects such as wheels and axles.
- Outside, inside, and step dimensions measured with jaws
- Hole/pocket depth measured with depth blade
- Can be used to scribe measurements onto pine blocks
- Inches / millimeters can be changed at any time
- Zero at any point for relative measurements
- Off/on button
- 1.5V battery and instructions included
- Accuracy: 0.0005 inches or 0.01 millimeters
- Use firm, but not excessive pressure on the thumb wheel to tighten the calipers on the object.
- Before measuring, zero the caliper by closing the jaws and pressing the 'ZERO' button.
- Close the jaws over the object.
- While applying pressure with the thumb wheel, wiggle the object slightly to ensure that the jaws read the minimum measurement.
- For higher accuracy, use the thin 'blade' tips of the jaws to make measurements. However, use caution when measuring soft material (such as pinewood derby wheels and wood) with the thin tips as they can cut the material
- Insert the upper jaws into the pocket or hole and open the jaws.
- While applying pressure with the thumb wheel, wiggle the object slightly to ensure that the jaws read the maximum measurement.
- Place the jaw end of caliper against the upper step and open or close the jaws so that the back jaw engages the lower step. In the photo, the distance from the wheel hub to the outside tread surface is being measured.
- Rest the non-jaw end of the caliper on the rim of the hole/pocket.
- Open the jaws until the depth blade reaches the bottom of the hole/pocket.