Types of gauges in metrology pdf


  • Gauges: 9 Different Types of Gauge with [Working and Images]
  • Main Types of Limit Gauges (With Diagram)| Metrology
  • Types of Gauges in Metrology [Notes with PDF]
  • The types are: 1. Plug Gauge 2. Pin Gauge 3. Snap Gauge 4. Ring Gauge 5. Calliper Gauge 6. Thickness or Feeler Gauge 7. Radius or Fillet Gauge 8.

    Screw Pitch Gauge. Type 1. Plug Gauge: A plug gauge is a cylindrical type of gauge, used to check the accuracy of holes. The plug gauge checks whether the whole diameter is within specified tolerance or not.

    The various plug gauges are shown in figure 1. Type 2. Pin Gauge: When the holes to be checked are large than 75mm, such as automobile cylinder, it is convenient to use a pin gauge as shown in Fig. During measurement, the gauge is placed lengthwise across the cylinder bore and measurement is made.

    These gauges are especially useful in measurement of width of grooves or slots. Snap Gauge: A snap gauge is a U-Shaped frame having jaws, used to check the accuracy of shafts and male members. The snap gauge checks whether the shaft diameter is within specified tolerances or not. The various snap gauges are shown in Figure 1. Snap gauge may be single ended or double ended. Snap gauge may have fixed or adjustable jaws. Generally Go and Not-Go both the features are provided in a single jaw.

    Snap gauges are light in weight, easy to operate, sufficiently rigid, and is designed to permit interchangeability of many parts. These are available in the size of mm with tubular frames. Type 4. Ring Gauge: A ring gauge is in the form of a ring, used to check the shafts and male members. The opening or hole in the Go gauge is larger than that in the Not-Go gauge. A ring gauge with both members combined in one ring is shown in figure 1. Calliper Gauge: A calliper gauge is similar to a snap gauge, but it is used to check both the inside and outside dimensions.

    Type 6. Thickness or Feeler Gauge: Thickness or feeler gauge is frequently used to measure clearances between components. These gauges are ideal for measuring narrow slots, clearances, setting small gap, and determining fit between mating parts.

    A feeler gauge consists of a set of narrow strips or blades of sheet to a thickness marked on each strip. The complete set consists of a number of strips of different thickness assembled together as shown in fig 1. The width of each strip is generally available to During use, it is essential that the blades should neither be forced nor slide freely between the mating parts.

    The standard has recommended seven sets of feeler gauges of different number of blades. A typical eight blade set of feeler gauge is shown in Fig. Type 7. Radius or Fillet Gauge: Radius gauge are supplied in sets, are used: a To check concave and convex radii on corners or shoulders. A typical application of Radius gauge is shown in figure. Screw Pitch Gauge: A screw pitch gauge is also called thread gauge is looks similar to that of a feeler gauge. Each strip or blade has several teeth, which are accurately shaped to the standard thread form.

    They are also available in metric and inch pitches.

    There are basically classified into two types, Rib type snap gauges Plate snap gauges 1. Rib Type Snap Gauges It is a double-ended type snap gauges which are used or checking sizes in the range of 3 mm to mm and single-ended progressive type snap gauges are suitable for the size to range of to mm. The gauging surface is hardened up to H. V and suitably stabilised, ground and lapped. The other surfaces are finished smooth.

    Plate Snap Gauges It is a double-ended type snap gauges are used for sizes in the range of 2 to mm and single-ended progressive type in the size range of to mm. These plate snap gauges are usually made of wear-resistant steel of suitable quality. The gauging surfaces are suitably hardened, stabilized, ground and lapped. Other surfaces are smooth finished. The gauges are plainly flat and all sharp corners and edges are removed.

    A ring gauge consists of a piece of metal in which a hole of the required size is based as shown in the figure. Limit Gauges There are several methods available to determine the dimensions of components in a system of limits and fits. The method of measurement adopted for mass production of parts is called the system of limit gauging.

    It has an advantage that it can be operated by unskilled persons. These gauges represent the limit sizes of the workpiece, as per the specified product tolerances. Pin Gauges When the holes to be checked are larger than 75 mm, such as an automobile cylinder, it is available to use a pin gauge as shown in the figure. During the measurement, the gauge is located lengthwise in the cylinder bore and measurement is done.

    These types of gauges are particularly useful in the measurement of grooves or slot widths. Calliper Gauges A calliper gauge is similar to a snap gauge but it is used to check both the inside and outside dimensions of the product. One end of calliper gauge checks the inside dimensions hole diameter , while the other end measures the outside dimensions shaft diameter.

    Feeler Gauge It is also known as a thickness gauge. Feeler gauges are often used to measure the clearance between the components. These gauges are excellent for the measurement of narrow slots, measuring clearance, determining small spacing, and determining the fit between mating parts.

    An extensive application of the filler gauge is to adjust the spark gap between the distributor points of a vehicle. This types of gauges are made of a set of narrow strips or blades of a sheet of marked thickness on each strip.

    The whole set consists of a number of strips of various thickness that are assembled together. The width of each strip is commonly prepared up to During the usage, it is essential that the blade should neither be forced nor slide smoothly between the mating parts. Screw Pitch Gauges The screw pitch gauge is also called a thread gauge which looks related to a filler gauge.

    Each strip or blade has several teeth, precisely shaped in standard thread form. They are used to check the pitch of screw threads. The screw pitch gauges are similarly available in metric and inch pitches.

    Radius or Fillet Gauge These gauge types are used to check the concave and convex radii on corners or shoulders. It is also useful for layout work and inspection of components in various industries.

    It is used as a template when grinding of cutting tools. We have discussed all types of gauges used in industries. If you like this article on gauges then please share with your friends. If you want more of this then please checkout our blog. Subscribe to our newsletter to get latest article notification.

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    Snap Gauge: A snap gauge is a U-Shaped frame having jaws, used to check the accuracy of shafts and male members. The snap gauge checks whether the shaft diameter is within specified tolerances or not.

    The various snap gauges are shown in Figure 1. Snap gauge may be single ended or double ended. Snap gauge may have fixed or adjustable jaws. Generally Go and Not-Go both the features are provided in a single jaw. Snap gauges are light in weight, easy to operate, sufficiently rigid, and is designed to permit interchangeability of many parts.

    These are available in the size of mm with tubular frames. Type 4. Ring Gauge: A ring gauge is in the form of a ring, used to check the shafts and male members.

    Gauges: 9 Different Types of Gauge with [Working and Images]

    The opening or hole in the Go gauge is larger than that in the Not-Go gauge. A ring gauge with both members combined in one ring is shown in figure 1. Calliper Gauge: A calliper gauge is similar to a snap gauge, but it is used to check both the inside and outside dimensions.

    Type 6. Thickness or Feeler Gauge: Thickness or feeler gauge is frequently used to measure clearances between components. The width of each strip is commonly prepared up to During the usage, it is essential that the blade should neither be forced nor slide smoothly between the mating parts. Screw Pitch Gauges The screw pitch gauge is also called a thread gauge which looks related to a filler gauge.

    Each strip or blade has several teeth, precisely shaped in standard thread form. They are used to check the pitch of screw threads. The screw pitch gauges are similarly available in metric and inch pitches. Radius or Fillet Gauge These gauge types are used to check the concave and convex radii on corners or shoulders.

    It is also useful for layout work and inspection of components in various industries.

    Main Types of Limit Gauges (With Diagram)| Metrology

    It is used as a template when grinding of cutting tools. We have discussed all types of gauges used in industries. If you like this article on gauges then please share with your friends. If you want more of this then please checkout our blog. Subscribe to our newsletter to get latest article notification.

    Types of Gauges in Metrology [Notes with PDF]

    This gauge cannot be used by an engineer due to the existence of tolerance in a workpiece. Limit Gauge: Limit Gauge is defined as the gauge that is used to measure a component by two limits, one is High and another is Low. So, there are two gauges to measure the dimension of the material.

    The part of the component has to pass through the Go-Gauge and for the Not-Go-Gauge, it has not to pass. This gauge is widely used in industries.

    Indicating Gauge: Indicating Gauge is defined as the gauge which is used to measure a part of a material and shows the measurement on a display. This gauge displays the measurement on the indicator or display, so it is termed as the Indicating Gauge. This gauge is complex than other gauges. The best example of the Indicating Gauge is Dial Gauge. Nowadays such indicating gauge has a system of the visual display. Dial Indicator Combination Gauge: Combination Gauge is defined as the gauge which can take more than one dimension of the parts of the material consecutively.

    It is very useful as at a time more than one measurement of the parts can be taken. It consumes less time and produces more efficient results.

    This gauge is used in the production time at the workshop so that this gauge is named as the Workshop Gauge.


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