Question
Download Solution PDFName the part of the micrometer that helps in maintaining uniform pressure on the job during measurements.
This question was previously asked in
ISRO VSSC Technician-B (Fitter) Official Paper (Held On: 14 July 2021)
Answer (Detailed Solution Below)
Option 1 : Ratchet stop
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ISRO Technician B: Fitter Full Test 1
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Detailed Solution
Download Solution PDFExplanation:
Outside micrometer:
- A micrometer is a precision instrument used to measure a job, generally within an accuracy of 0.01 mm.
- Micrometers used to take the outside measurements are known as outside micrometers.
The parts of a micrometer are listed here.
Frame:
- The frame is made of drop-forged steel or malleable cast iron. All other parts of the micrometer are attached to this.
Ratchet stop:
- The ratchet stop ensures uniform pressure between the measuring surfaces.
Barrel/Sleeve:
- The barrel or sleeve is fixed to the frame. The datum line and graduations are marked on this.
Thimble:
- On the beveled surface of the thimble also, the graduation is marked. The spindle is attached to this.
Spindle:
- One end of the spindle is the measuring face. The other end is threaded and passes through a nut. The threaded mechanism allows for the forward and backward movement of the spindle.
Anvil:
- The anvil is one of the measuring faces which is fitted on the micrometer frame. It is made of alloy steel and finished to a perfectly flat surface.
Spindle lock nut:
- The spindle lock nut is used to lock the spindle at the desired position.
Last updated on May 28, 2025
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