The Starrett 798A-6/150 heavy-duty digital caliper measures 0 to 6 inches and 0 to 150 mm with 0.0005” or 0.010 mm accuracy, is IP67 rated for dust, water, and oil protection, and comes in a protective plastic case. This caliper has a 3.5 mm thick bar for long life.
The caliper can be used with one hand through operating the fine adjustment roll with the thumb. A lock screw can hold the slide in position. Depth rod is integrated into the rack of the caliper, unlike many calipers which offer a detachable depth rod, or none at all. The hardened stainless steel body offers corrosion resistance and long life. Single battery is accessible, on the front of the plastic casing, next to the LCD. The last measurement position is retained when the caliper is shut off, and it is simple to zero the caliper at any position with the clearly marked zero button. The display reactivates when the slide is moved, without losing position. The LCD is large and easy to read with 0.31” characters. The linear encoder system is induction-type. The caliper shuts off automatically after thirty minutes of nonuse. Linear accuracy meets the internationally used Deutsches Institut fur Normung (DIN) 862: Vernier Calipers Requirements and Testing standards. Approximate jaw depth for the outside measuring jaws is 1-1/2” (38mm) while the jaw depth for the inside measuring jaws is 5/8” (16 mm).
Calipers measure the distance between two opposing sides of an object. They make inside, outside, depth, or step measurements, according to their type. Calipers are commonly used in architecture, metalworking, mechanical engineering, machining, manufacturing, carpentry, and medicine. The simplest calipers have two legs to mark the two points and require a ruler to take the measurement. More complex calipers use two sets of jaws instead of legs and have up to two graduated scales. Vernier, dial, and digital calipers give direct and accurate readings and are functionally identical, having a calibrated scale with a fixed jaw, and another jaw with a movable pointer that slides along the scale. The vernier caliper has a scale sliding parallel to the main scale for an additional, fractional reading to improve measurement precision. The dial caliper has a circular dial with a pointer on a toothed gear rack replacing the second vernier scale. As with the vernier, this second measurement is added to the reading from the main scale to obtain the result. The dial caliper is used also for measuring size differential between two objects. The digital caliper takes the same sort of differential measurements as the dial caliper by zeroing the display at any point along the slide, with an LCD (replacing the dial) that displays a single, easily read value in both English and metric units. Some digital calipers can hold data readings between measurements and send them to data collection devices.
The L. S. Starrett Company was founded in 1880, originally manufacturing bench vises, squares, and other tools. They acquired other companies throughout the years, expanding their services into making precision measurement instruments and tools, such as calipers, micrometers, saw blades, and gauges. Starrett is headquartered in Athol, Massachusetts and has manufacturing facilities in Brazil, the United Kingdom, China, and other locations.
- What’s in the Box:
- Starrett 798A-6/150 digital caliper
- CR 2032 3V battery
- Fitted plastic case