Another new topic What is Bore Gauge, it's Types and Least Count, least count and detail information of bore gauge other general uses so without wasting of time let's discuss further information,
What is Bore Gauge, it's Types and Least Count
What is Bore Gauge:-
Bore gauge is measuring instrument which measures internal diameter of hole using with master gauge (ring gauge).
A bore gauge, also known as a bore dial gauge or internal micrometer, is a measuring instrument used to determine the internal diameter or bore size of a hole or cylindrical cavity. It is commonly used in engineering, machining, and manufacturing industries.
A bore gauge typically consists of a measuring head or probe attached to a handle or frame. The measuring head contains two or three spring-loaded anvils or contact points that can be expanded or contracted. The contact points make contact with the inner surface of the hole being measured, and their position is indicated on a scale or dial.
To use a bore gauge, the anvils are set to a smaller size than the hole being measured. The gauge is then inserted into the hole, and the contact points expand until they touch the inner surface of the bore. The measurement is read from the scale or dial, indicating the size of the hole.
Bore gauges come in various types and designs, including traditional analog gauges with dial indicators and modern digital gauges with electronic displays. They can have different ranges and accuracy levels, depending on the specific application requirements.
Bore gauges are essential tools for quality control and precision machining, as they allow accurate measurement of internal dimensions, such as bore diameter, cylinder diameter, and taper. They are commonly used in industries such as automotive, aerospace, oil and gas, and general mechanical engineering, where precise internal measurements are crucial for ensuring proper fit, alignment, and functionality of components.
Center of prove and anvil are guided to diameter part of a hole by guide assembly, displacement of contact point is shift to dial indicator by right angle change in ratio of 1 : 1 with cam mechanism.
Measurement accuracy changed according to graduation of used dial indicator.
Measuring range are available in minimum φ6 mm to maximum φ450mm.
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| Bore gauge |
Bore gauge (CD type)
• Compliance with JIS B 7515A.
• Anvil and Contact point are using carbide ball.
• The measuring depth extend using the extension rod to measure deep hole.
Least count:-
Least count of Bore gauge (Insize) 0.01mm and (Baker) 0.001mm.
The least count of a bore gauge refers to the smallest increment or division that can be read or measured on the scale or dial of the gauge. It represents the smallest change in measurement that the gauge can detect or display.
The least count of a bore gauge depends on the design and specifications of the specific gauge being used. It is typically determined by the graduations or markings on the scale or dial. For analog bore gauges with a dial indicator, the least count is usually indicated on the dial itself.
For example, a common least count for analog bore gauges is 0.01 mm (0.0001 inches). This means that the gauge can measure and display changes in the bore diameter in increments of 0.01 mm or 0.0001 inches.
Digital bore gauges, on the other hand, often have a digital display that provides a direct reading of the measurement. The least count of a digital bore gauge is determined by the resolution of the digital display. For example, a digital bore gauge may have a resolution of 0.001 mm (0.0001 inches), meaning it can measure changes in the bore diameter in increments of 0.001 mm or 0.0001 inches.
It's important to note that the actual accuracy of the measurement will depend on factors such as the quality of the gauge, proper calibration, and the skill of the operator. The least count simply represents the smallest discernible increment on the gauge's scale or display.
Types of Bore Gauge
There are several types of bore gauges available, each designed for specific measurement applications. Here are some common types of bore gauges:
Telescopic or Cylinder Bore Gauge: This type of bore gauge consists of a handle or frame with a measuring head that contains two or three telescoping arms or rods. The rods can be adjusted to fit inside the bore and then locked in place. The measurement is read from a scale or dial on the handle, indicating the bore diameter.
Dial Bore Gauge: Dial bore gauges are similar to telescopic gauges but feature a dial indicator instead of a scale. The measuring head contains spring-loaded anvils that expand to contact the bore. The dial indicator displays the measurement directly in a digital or analog format.
Three-point Bore Gauge: Also known as tri-point or three-jaw bore gauges, these gauges use three contact points or jaws that expand outward to contact the inner surface of the bore. The measurement is indicated on a scale or dial on the gauge body.
Pistol Grip Bore Gauge: This type of bore gauge has a pistol grip handle with a dial indicator or digital display mounted on top. The measuring head consists of two or three spring-loaded contact points that extend when the trigger is squeezed. The measurement is shown on the display.
Split Ball Bore Gauge: Split ball gauges have a measuring head with two halves that expand outward to contact the bore. The head is split, allowing easy insertion and removal from the bore. The measurement is typically read from a scale or dial.
Setting Ring Bore Gauge: Setting ring gauges are used to calibrate or set other bore gauges. They consist of a precisely manufactured ring with a known diameter. Bore gauges are compared against the setting ring to ensure accuracy.
These are just a few examples of bore gauges commonly used in industry. The specific type of bore gauge selected depends on the application, the size of the bore being measured, and the desired level of accuracy.
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