11-precision measuring tools

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Lesson No.11

Week No.

06Lesson Name

Precision measruing tools



g

PRECESION MEASURING TOOLS

VERNIER CALIPER

DIGITAL DIAL BORE GAUGE

VERNIER HEIGHT GAUGE

TELESCOPIC GAUGE

OUTSIDE MICROMETER

DIGITAL DEPTH MICROMETER



VERNIER CALIPER

Principle:- It works on the principle of different between two

differently graduated scale

Outside linear measurement

Inside linear measurement

Depth measurement



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



DIAL VERNIER CALIPER

DIGITAL VERNIER CALIPER



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)



VARIOUS TYPES OF HIGHT GUAGE



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”.



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



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.



DIGITAL DEPTH MICROMETE

DIGITAL DEPTH MICROMETER



DIGITAL DIAL BORE GAUGE



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 ?



CONCLUSION

Thus, we get the knowledge of precession

measuring tools.

11-precision measuring tools

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