SNAP GAUGE
Snap gauges
are used for checking external dimensions. They are also called as gap gauges.
The
different types of snap gauges are:
1.
Double Ended Snap Gauge
2.
Progressive Snap Gauge
3.
Adjustable Snap Gauge
4.
Combined Limit Gauges
5.
Position Gauge
1.Double
Ended Snap Gauge
This
gauge is having two ends in the form of anvils. Here also, the GO anvil is made
to lower limit and NOGO anvil is made to upper limit of the shaft. It is also
known as solid snap gauges
2.Progressive
Snap Gauge
This
type of snap gauge is also called caliper gauge.
It
is mainly used for checking large diameters up to 100mm.
Both
GO and NOGO anvils at the same end.
The
GO anvil should be at the front and NOGO anvil at the rear.
So,
the diameter of the shaft is checked progressively by these two ends.
This
type of gauge is made of horse shoe shaped frame with I section to reduce the
weight of the snap gauges.
3.Adjustable
Snap Gauge
Adjustable
snap gauges are used for checking large size shafts made with horseshoe shaped
frame of I section.
It
has one fixed anvil and two small adjustable anvils.
The
distance between the two anvils is adjusted by adjusting the adjustable anvils
by means of setscrews.
This
adjustment can be made with the help of slip gauges for specified limits of
size.
4.Combined
Limit Gauges
A
spherical projection is provided with GO and NOGO dimension marked in a single
gauge. While using GO gauge the handle is parallel to axes of the hole and
normal to axes for NOGO gauge.
5.Position
Gauge
It
is designed for checking the position of features in relation to another
surface.
Other
types of gauges are also available such as contour gauges, receiver gauges,
profile gauges etc.
