Why height gauge is called so?
Height gauges are precision measuring instruments that can be used to determine the height of an object or workpiece with extremely high precision and accuracy, or to provide marked locations on the item relative to a reference plane for subsequent use.
What is a height gauge called?
Devices similar in concept, with lower resolutions, are used in health care settings (health clinics, surgeries) to find the height of people, in which context they are called stadiometers. Height gauges may also be used to measure the height of an object by using the underside of the scriber as the datum.
What is the height gauge used for?
Height gages are normally used on a granite surface plate to measure and/or scribe part features from a datum plane. Generally a scriber, test indicator, touch probe or CMM-style probe is used to locate the measured feature. Height gages are an indispensable instrument for quality control.
How many types of height gauges are there?
You can choose between 400 mm, 700 mm, 1100 mm and 1800 mm models.
How accurate is a height gauge?
A typical height gauge is good to a thousandth (0.001″). A micrometer or electronic height gauge is accurate to a tenth (0.0001″) or sometimes even better. The primary weakness in accuracy for a height gauge is how square it is to the reference plane being measured.
What is height gauge least count?
2 0.02 mmLeast Count of a Height Gauge: Least count is the difference between one smallest reading of the main scale and one smallest reading of vernier scale. A common and simple mechanical vernier height gauge has a least count of 2 0.02 mm.Jul 22, 2020
Why do we use Vernier height gauge?
Explanation: A Vernier height gauge is a precision instrument used to measure the depth of holes, the height of work, recesses, slots, and steps with an accuracy of 0.02 mm. Outside dimensions are measured by the outside caliper and inside dimensions are measured by the inside caliper.
How do you clean a Vernier height gauge?
Thoroughly clean the height gage by wiping and apply anti-corrosive oil to the slide way, scriber, and reference surface of the base.
How is the Vernier height gauge generally specified?
For specifying the vernier height gauge one is required to specify clearly the range of measurement, the type of scale which is desired, and any particular requirements with regard to the type of vernier desired.Jun 22, 2018
Who invented Vernier height gauge?
Pierre VernierAs long ago as 1631, Pierre Vernier, a French scientist, mathematician and engineer invented the “Vernier scale” and so provided the basis for mechanical engineers to measure and manufacture more accurately than ever before.Jul 27, 2018
What is the price of height gauge?
Height Gauges Price List in India 2022Best Height Gauges ModelsPriceMitutoyo 514 107 - 0-600 mm Vernier Height Gauge with Adjustable Main Scale₹42,936Mitutoyo 192 130 - 0-300 mm Dial Height Gauge with Digital Counter₹25,544Mitutoyo 192 630 10 - 0-300 mm Standard Digimatic Height Gauge with SPC Data Output₹44,2409 more rows
When was the micrometer invented?
The micrometer used with a telescope was invented about 1638 by William Gascoigne, an English astronomer.
What scales were used for height gages?
Vernier scales were soon adapted for use with some of the first height gages. When you come right down to it, the earliest height gages were Vernier calipers standing upright on a solid base. Inspectors and machinists soon found other ways to use height gages, such as scribing.
What is a Cadillac height gage?
The Cadillac gage is a height stand that has several known heights (or steps) which will allow an operator to use a height gage with a mounted test indicator to measure the deviation from whatever known surface is appropriate on the Cadillac gage.
How to use height gauge?
Height gauges are used in quality control applications and can perform several types of measurements: 1 To measure the distance from a reference surface to a specific feature of a part to verify that it meets specifications and tolerances 2 To scribe a part with accurate vertical dimensions or features from a datum plane so that additional machining can be done 3 To perform 2D measurements of part features 4 To verify center-to-center dimensions 5 To measure flatness 6 To measure angles 7 To measure straightness/squareness or perpendicularity of parts
How does a height gauge work?
Height gauges consist of a sliding carriage with a moving stylus or scribe that is mounted to a vertical axis beam or column that contains a measuring scale. The beam is configured so that it is perpendicular to the base of the height gauge, which is typically made using a rigid material to add stability to the instrument for measurements. The beam or column height can vary from 6 inches or less to upwards of 6 feet, depending on the model. Custom gauges may extend the column height even higher. The carriage movement is controllable and may be adjusted by a set of adjustment screws for coarse or fine adjustments and may be locked into position as needed. A measuring jaw is used whose upper and lower surfaces are parallel to the base of the height gauge. In the case where it is desired to scribe the workpiece, a specialized scribing attachment can be used in place of the measuring jaw.
What is a digital height gauge?
Digital counter height gauges combine a dial and needle as found on the dial height gauge type with a dual-digit counter to increase the speed and efficiency of the measurement process . The counter will allow readings to tenths of an inch while thousandths of an inch can be read on the dial. The presence of an additional counter also has the advantage in that it enables users to set and maintain an absolute and floating zero if needed.
What is the measurement range of a dial height gauge?
Dial height gauges tend to be available in smaller measuring size ranges, typically less than 12 inches or 300 mm. These units feature a mechanical dial with a needle pointer that allows for easy reading. Because of their size, dial height gauges are very portable and can be stored in a toolbox.
What is the size of a Vernier gauge?
They are generally available in measuring size ranges from 6 inches to 6 feet. Models can have imperial (inch) or metric (mm) scales or both on them.
What does variation in the reading on the height gauge indicate?
Any variation in the reading on the indicator reflects that the surface level is not correct, and the stoning and cleaning steps need to be repeated to correct the condition. The use of gage blocks is also recommended to validate all dimensional readings taken by a height gauge.
What is used to measure and scribe part features from a datum plane?
When using a height gauge, a granite surface plate is typically used to measure and scribe part features from a datum plane.
What is a height gauge?
Typically a scriber, test indicator, touch probe, or CMM-style probe is used to detect the measured feature. Height gauges are used to measure angles and flatness. It is also used to measure straightness, squareness, or perpendicularity of objects.
What are the advantages and disadvantages of using a height gauge?
The main advantage of using vernier height gauge is: One set of jaws can be used to determine internal measurements, while another set can be used to measure external measurements. It is the simplest and quickest to use and is also quite inexpensive.
What is the least count of a vernier gauge?
Least count is the difference between one smallest reading of the main scale and one smallest reading of vernier scale. A common and simple mechanical vernier height gauge has a least count of 2 0.02 mm.
What precautions should be taken when using a height gauge?
In long height gauges, to avoid its heating by warmth from the hands, care should be taken.
What should the projection of the measuring jaw from the edge of the beam be?
The projection of the measuring jaw from the edge of the beam should be at least equal to the projection of the base from the beam. For any position of the slider, the upper and lower gauging surfaces of the measuring jaw should be flat and parallel to the base within 0.008 mm.
What are the three factors that determine the height of a vernier?
In specifying the vernier height gauge three main factors are important and they are: Clear specification of the range of measurement. Types of scales desired. Any specific requirements regarding the type of vernier desired. In general, all the parts of height gauges are made of good quality steel or stainless steel.
Swiss Precision
Developing The Art of Measurement
- Over the next forty years metrology products were developed at a furious rate and with that came the amazing reliability of the modern automobile, precision components and aviation parts. The silicon chip had arrived. Computers were no longer science fiction but now enabled the quality control inspector to measure digitally and print out reports. Computerised height gauges or verti…
British Innovation
- British company, Eley Metrology Ltd replied in 1983 with a vertical device known as a ‘Vertex’. Thisprovided diameter and feature measurements along with computerised PCD and 2D alignment capability. The device had an on board Statistical Process Control (SPC) option and offered an integral printer and motorised operation. Then in 1991, a completely stand-alone full…
Reducing Costs
- The cost of precision was becoming smaller. Methods of manufacture were driving prices lower. Mass-produced products were arriving from the east, and the beautiful quality of the original Swiss instrument of 1968 seemed a thing of the past. We now have computerised error correction. This means that prices can be kept low and margins maintained by compensating fo…