This document discusses different types of inspection gauges used to measure physical quantities in manufacturing. It defines a gauge as a device that measures physical quantities like thickness, gap, diameter, pressure, or flow along a calibrated scale. Some common gauges mentioned include calipers, vernier calipers, micrometers, bridge gauges, depth gauges, dial gauges, thread pitch gauges, feeler gauges, bore gauges, and plug gauges. The document provides details on each type of gauge, including what they measure and their applications in quality inspection.

1. INSPECTION GUAGES WEEK # 02

2. WHAT IS A GUAGE ?
It is an engineering device used to make
measurements.
It is a device that measures a physical
quantity like thickness, gap, diameter,
pressure, flow or acts as a device that
displays the measurements of a measured
system along a calibrated scale.

3. INSPECTION GAUGES
 A tool which is used to check a physical quantity like a product’s
dimension with reference to its maximum and minimum acceptable
limits.
 Helps in segregating acceptable and non-acceptable product in
mass production.

4. TYPES OF INSPECTION GAUGES
Calipers:
 Usually of two types; inside and
outside calipers.
 Measure internal or external size
(e.g. diameter) for an object.
Vernier Calipers:
 Precision tool used to measure a
small distances with high
accuracy. (external and internal)
 Least count 0.01mm.

5. TYPES OF INSPECTION GAUGES
Micrometer:
 Fine precision tool which is used to
measure small distances.
More precise than Vernier Calipers.
Least count 0.001 mm.
Bridge Gauge:
 Measures the amount of wear of
Main engine bearing.

6. TYPES OF INSPECTION GAUGES
Depth Gauge:
 Measures the depth of a slot, hole or
any other surface of an object.
 It can be of scale, dial or digital type.

7. TYPES OF INSPECTION GAUGES
Telescope Gauge:
Measures internal diameter of bore,
hole or groove up to 6 inches by
transferring the internal dimension to a
remote measuring tool.
The telescopic rods are attached to a
spring which enables them to move in and
out of their casing.

8. TYPES OF INSPECTION GAUGES
Limit Gauge or Go/No Go gauge:
 It is an inspection tool which is used to
check a work piece against its
tolerances via a go/no-go test.
 ISO 1502 sets a standard for threads
and gauging to test them.

9. TYPES OF INSPECTION GAUGES
Snap Gauge:
 A limit gauge with permanently or
temporarily fixed measurement
aperture(s) (gaps), used to quickly verify
whether an outside dimension of a part
matches a preset dimension or falls
within predefined tolerances.
 It is a type of go/no-go gauge.

10. TYPES OF INSPECTION GAUGES
Dial Gauge:
A gauge consisting of a circular graduated
dial and a pointer actuated by a member
that contacts with the part being calibrate.
Variety of application in everyday science.

11. TYPES OF INSPECTION GAUGES
Thread Pitch Gauge:
 Used to measure pitch or lead of screw
thread.
 Also called screw pitch gauge or pitch
gauge.
Profile Gauge:
 Profile gauge or contour gauge is a tool for
recording the cross-sectional shape of a
surface.

12. TYPES OF INSPECTION GAUGES
Ring Gauge:
 Used to measure pitch or lead of screw
thread.
 Also called screw pitch gauge or pitch
gauge.
Feeler Gauge:
 Used to measure gap widths.
 Feeler gauges are mostly used in engineering
to measure the clearance between two parts

13. TYPES OF INSPECTION GAUGES
Temperature Gauge:
Temperature gauges works on
expansion principle.
These gauges operate with a helical
or spiral tube & an expansion gauge
containing a temperature sensor.
Commonly used in foundries &
automobile industries.
If the temperature
changes, the internal
pressure of the
gauge will change
as well and in turn
the dial on the
gauge.

14. TYPES OF INSPECTION GAUGES
Wire Gauge:
Wire gauge is used to measure
how large a wire is, either in
diameter or cross- sectional area.
This determines the amount of
electricity a wire can safely carry.

15. TYPES OF INSPECTION GAUGES
Bore Gauge:
Bore gauge is a device which used
to measure holes accurately.
Types:
Point to point bore gauge
Three point bore gauge
Two point electronic plug gauge
 Dial bore gauge

16. TYPES OF INSPECTION GAUGES
Plug Gauge:
 plain plug gauge used to check
the size of a hole.
The green end is the go, and the
red end is the no go.
 Type of go/no-go gauges.

17. TYPES OF INSPECTION GAUGES
Tide Gauge:
 Also known as mareograph.
Tide gauge is a device used to
measure the sea level changing
water condition.

18. THE END