In Mechanical Engineering Surface finish and the surface roughness, both are referred to same. But In general Surface finish referred as the overall texture of the surface and it is a combination of three factors. Those are surface roughness, Surface waviness, Lay. Little Confusion? Let’s get into the topic Make it Clear. We produce Machine elements […]
Metrology is the science of measurement. It meant understanding the units of each quantity and the realisation of the units and calibration. In each country, they follow different unit systems, among them, the Metric system is the predominant system in the world. In this article, we have listed all the different Metrology topics that we have discussed so far.
Based on the field of application Metrology can be further divided into Industrial metrology, Scientific or Fundamental metrology and Legal metrology.
How to Calculate tolerance values for shaft or a hole?
In machine Design, each machine member will be mated with another machine member with the defined fit. There are the different type of fits available. They are Clearance Interference, Transition fits. These fits are controlled with some Tolerances and allowances according to some Standards. Actually, these tolerances values can be calculated. According to Indian Standard […]
Fundamental deviations for shaft and holes acc. Indian Standard system.
Fundamental Deviation of shaft and holes– Fundamental deviation is an allowance rather than tolerance. The allowance is simply the deviation between the hole minimum diameter to the shaft maximum diameter. Where the tolerance refer to either hole (Max. dia of hole-Min. Dia. of the hole) or shaft (Max. Dia. of the shaft- Min. Dia. of […]
What are Hole Basis System and Shaft Basis system?
Hole Basis System and Shaft Basis system – In the Machine design process there are different components that are mated together to make the machine. These components will have different functions. Based on their type of functions there must be the type of fits between the two mating components should be determined. How actually can […]
What are the different types of Fits in Engineering?
Types of Fits In Engineering-In mechanical engineering, the Mating of two components is to be determined based on the function of the two components. Even though the fasteners make them tight but tightness between the two surfaces may be needed high in some applications wherein in other applications it is not required to be that […]
What are the important Terms used in Limit System?
In mechanical engineering System of limits or Limit System is a concept of controlling the sizes of machine elements while manufacturing each component. Because taking exact dimensions is an ideal condition but in practical(Manufacturing/Measuring) methods, it is not possible. So limit system enables how much amount of deviation is acceptable. How do we apply the limit system […]
What is Interchangeability in Machine Design? | Interchangeable Parts |
Topic: What is Interchangeability in Machine Design? | interchangeable parts | In Machine Design Interchangeability represents the interchangeable parts. So what are the Interchangeable parts? A machine is a combination of several components. If any of the components is failed or broken then the part needed to be replaced with a new component. This new component should […]
What are the different Flatness Testing Methods for Surface Plates?
Topic: What are the different Flatness testing methods for Surface Plates? The surface plate is a massive solid structure, highly rigid in design which is having a true flatness of the surface. In metrology, the Surface plate is used as a measuring base or a datum surface for testing of flatness of surfaces. Surface plate forms the […]
What are the Rules for writing SI Units? | Why space between number and unit scientific writing?
Topic: What are the Rules for writing SI Units? | space between number and unit scientific writing The different Measurement systems are Imperial System or F.P.S System Metric system or M.K.S System S.I System Read more about Measurement systems here… S.I System S.I means System International. It is more superior to all other systems. This system is extension and refinement of the Metric […]
What is a LVDT? | Linear Variable Differential Transformer
Topic: LVDT? | Linear Variable Differential Transformer | LVDT Position Sensor LVDT stands for Linear Variable Differential Transformer. We can simply call Differential Transformer. LVDT is an Electro-Mechanical Sensor. Before getting into the topic we must not confuse with the following terms Sensor: A device that converts a physical motion into an electrical output. Actuator: A device […]
Brook’s Level Comparator | High Magnification Comparators
Topic: Brook’s Level Comparator | High Magnification Comparators | Brooks level comparator |Brook level comparator | High Magnification gauge Comparators. Brook’s Level Comparator is a mechanical type of comparator with the highly sensitive spirit level to accomplish the high magnification system. What is a comparator? A comparator is a precision instrument used to compare the Dimensions of given […]
What is Zeiss Ultra Optimeter? Working Principle
Topic: What is Zeiss Ultra Optimeter? Working Principle of Zeiss Ultra comparator, What is Graticule? Zeiss Ultra Optimeter is an optical comparator. A comparator is a precision instrument used to compare the Dimensions of given working component with the actual working standard. There are different types of comparators are available. Optical Comparator uses optical means as the magnification system. Zeiss Ultra Optimeter uses The principle of […]
What is Surface Plate? Uses of Surface Plate | Metrology
In metrology, the Surface plate is used as a measuring base or a datum surface for testing of flatness of surfaces. Surface plate forms the basis of the measurement. Surface plates are widely used in where the inspection is carried out. We are going to discuss What is Surface Plate? Uses of Surface Plate, material construction […]
Screw Pitch Gauge | Thread Pitch Gauge | How to use Screw Pitch gauges?
Screw pitch gauge is also known for thread pitch gauge. Simply pitch gauge. In metrology, Screw pitch gauge/ Thread pitch gauge is designed to check the pitch of the thread by matching the strips with the teeth of any workpiece. This is not a precision measuring instrument, rather it allows the user to quickly determine the […]
How Fluid Displacement Comparator Works?
A comparator is a precision instrument used to compare the Dimensions of a given working component with the actual working standard. There are different types of comparators are available. In this article, we are going to discuss the Fluid Displacement Comparator. A Fluid Displacement comparator is a type of comparator which has very limited applications and works on the principle […]
What is the difference between Comparators and Measuring Instruments?
In metrology, Measuring instruments and comparators play a significant role, Measuring instruments are used to measure the actual dimension of the workpiece, whereas the comparators are used for comparison of the actual dimension with the working standard. Let’s see the difference between Gauges and Comparators. Difference between Comparators and Measuring Instruments / Comparators Vs Measuring […]
What is the difference between Gauges and Comparators?
In metrology, gauges and comparators play a significant role, Gauges are used to determine whether a dimension lies within the given range whereas the comparators are used for comparison of the actual dimension with the working standard. In this article, we are going to discuss What is the difference between Gauges and Comparators. let’s see […]
What are the different MultiCheck Comparators?
A comparator is a precision instrument used to compare the Dimensions of a given working component with the actual working standard. There are different types of comparators are available. In this article, we are going to discuss the Multicheck Comparator. Multicheck Comparator is one types of comparators. Multicheck comparator is meant to inspect the multiple dimensions of an object at […]
What is Optical Profile Projector working principle?
A comparator is a precision instrument used to compare the Dimensions of a given working component with the actual working standard. There are different types of comparators are available. In this article, we are going to discuss the Optical Profile Projector in detail. An Optical Profile Projector is a type of comparators. What is meant by a projector? A projector is […]
Pneumatic Comparators or Pressure Comparators |Metrology|
A comparator is a precision instrument used to compare the Dimensions of a given working component with the actual working standard. There are different types of comparators are available. In this article, we are going to discuss the Pneumatic Comparators or Pressure Comparators What are Pneumatics? The instruments which are operated by the gas or air under pressure are called Pneumatic. In […]