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7/28/2019 11-Precision Measuring Tools
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Lesson No.11
Week No.
06Lesson Name
Precision measruing tools
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g
PRECESION MEASURING TOOLS
VERNIER CALIPER
DIGITAL DIAL BORE GAUGE
VERNIER HEIGHT GAUGE
TELESCOPIC GAUGE
OUTSIDE MICROMETER
DIGITAL DEPTH MICROMETER
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VERNIER CALIPER
Principle:- It works on the principle of different between two
differently graduated scale
Outside linear measurement
Inside linear measurement
Depth measurement
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Constructional Features of Vernier caliper
Parts :- 1. Fixed jaw 2. Movable jaw
3. Beam/ Main scale 4. Vernier scale
5. Fine adjusting unit 6. Nibs
7. Depth bar 8. Locking screws
73
8
5
6
421
Range :- 150 mm, 250mm, 900mm, 1200mm.(Metric)
6”, 9”, 36” ( British)
1
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DIAL VERNIER CALIPER
DIGITAL VERNIER CALIPER
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VERNIER HEIGHT GAUGE
Principle :- It works on the principle of difference
between two differently graduated scales.
Use :- Precession Marking and Measurement of
height
Parts :-
1.Base scale 2. Beam/Main
3.Fine unit 4. Scriber
5.Vernier slide 6. Locking screws
2
5
6
3
4
1
Range :- 300mm, 400mm,
600mm,900mm,
1200mm.(Metric)
12”, 18”, 24”.(British)
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VARIOUS TYPES OF HIGHT GUAGE
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DIGITAL OUTSIDE MICROMETER
Principle :- Rotary motion of thimble is converted in
linear motion of spindle
Uses :- Precision Outside linear measurement.
Range :-
(Metric) :-0-25mm, 25-50mm
50-75mm, 75-
100mm (British)
:- 0-1”, 1”-2”, 2”-3”......
up to 12”.
12”-16”, 16”-20”,
20”-24”.
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Constructional Features of Outside
Micrometer
Parts :-
1. Frame
2. Barrel/Sleeve
3. Thimble
4. Spindle5. Anvil
6. Spindle Lock nut
7. Ratchet stop
7
2
3
1
64
5
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DEPTH MICROMETER
Principle :- Rotary motion of thimble is converted into
linear motion of spindle
Use :- Precision Depth measurement.
Parts :-
1. Base / Stock 2. Sleeve
3. Thimble 4. Ratchet stop
5. Ext. rod 6. Lock ring
4
3
2
6
5
1
Range :- 0-25mm, 25-
50mm, 50-75mm, 75-
100mm, 100-125mm,
125-150mm.
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DIGITAL DEPTH MICROMETE
DIGITAL DEPTH MICROMETER
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DIGITAL DIAL BORE GAUGE
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QUESTIONS
• List the type of Precesion measureing tools.• What is the principal of Vernier Calipers ?
• What is the use of Micrometer ?
• Which material is used in Vernier High Gauge?
• What is the use of Deapth Gauge Micrometer ?
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CONCLUSION
Thus, we get the knowledge of precession
measuring tools.