This article will explain in detail, what is screw gauge, how to use a screw gauge, and its advantages. Be sure to read the whole blog in order to gain maximum knowledge!
What is Screw Gauge?
A screw gauge is a measuring instrument that is used to measure the diameter of a fine wire or the thickness of a sheet of metal.
It consists of a frame that holds a spindle on which is mounted a thin disc known as a thimble.
The thimble has a V-shaped groove cut into its surface, and the depth of this groove is calibrated in millimeters or inches.
A screw thread is cut into the spindle, and this can be turned using a knob at the end of the frame.
As the screw is turned, the thimble moves up or down the thread, and this movement is translated into an equivalent measurement on the scale.
Diagram of Screw Gauge
The diagram below shows the parts of a typical screw gauge:
The main body of the gauge consists of a fixed jaw and a movable jaw.
The object to be measured is placed between the jaws, and the screw is turned until the jaws are touching the object. The reading on the scale indicates the diameter of the object.
The advantages of using a screw gauge
A screw gauge, also known as a micrometer screw gauge, is a precision measuring instrument that is used to measure the diameter of small objects.
It consists of a caliper with a screw thread that is used to measure the object’s diameter.
The main advantage of using a screw gauge is its accuracy. The least count of screw gauges is 0.01mm. It can measure diameters very accurately and repeatably.
In addition, it is relatively easy to use and does not require special training.
How to use a screw gauge
Using a screw gauge is relatively easy once you understand the basic concepts. The first step is to identify the purpose of the screw gauge.
There are two types of screws: those that measure the length and those that measure the distance between two points.
The next step is to find the appropriate size for your needs by consulting a screw gauge chart.
Once you have found the right size, simply insert the end of the screw into the slot on the gauge and turn it until it is tight.
The number visible on the top of the gauge corresponds to the measurement in millimeters.
Conclusion
In conclusion, the working principle of a screw gauge is relatively simple: it works by measuring the force required to move a piece of metal along its helical grooves.
The length and diameter of the grooves determine how much force it takes for the object to move, which in turn indicates its size.
With this knowledge, you can use a screw gauge with confidence next time you need to measure an object’s size accurately.
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