Dial gauges and Dial test Indicators

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Dial Indicator (or Plunger Dial Gauge)

The dial indicator or the Plunger dial gauge is one of the simplest and the most widely used mechanical comparator.

First of all the use of plunger dial gauge used to compare work-pieces against a master.

Least Count of Dial Indicator

Plunger Dial Gauge measurement limit is 10 mm with the least count of 0.01mm and 1mm with least count of 0.001 mm. likewise, another same comparator is Lever type.

coror cap and limit sticker of dial guage

It usually depends on the application, type of work, accuracy, and precision of work we like to measure.

As the above figure shows, the contact point moves upward and downward, with the movement of a pointer, the dial indicates movement in the required results.

  • Dial gauge also available with a large diameter for easy reading.
  • If you want to measure the back of the body use the Back Plunger type dial indicator.
  • Digital type dial gauge is more accurate than Dial display.
  • Dial indicator comes with different contact point vary according to the application.
  • You can change back cover in different situations.
  • A color cap and limit sticker may help to use a dial on a different purpose.

The user should avoid sudden contact with the workpiece surface, over tightening of contact points, and side pressure.

Lever Dial Gauge

Lever Dial Gauge also knew as Test Indicator. It used to measure sensitive contact.

Lever Dial gauge usually measure up to 0.80 mm. But some special type lever dial design for measurement up to 2 mm. 

lever dial gauge
test indicator

As the name suggests it contain lever-type contact, As Plunger type contact in Plunger Dial Gauge. This is light in weight and also smaller than Plunger Dial Gauge.

What is the Least count of Lever Dial Gauge(Test Indicator)?

The least count of Test Indicator(Lever dial gauge) is 0.01 mm with a range of 0.80 mm or up to 2 mm. But some special type of lever dial gauge has the least count of 0.001mm with a range of 0 to 1 mm.

Above information is valid only for dial-type test indicator. If you are looking for more accuracy choose Digital type gauges.

Likewise Plunger Dial Gauge measurement limit is 10 mm with the least count of 0.01mm and 1mm with least count of 0.001 mm.

It usually depends on the application, type of work, accuracy, and precision of work we like to measure.

furthermore, the main problem with digital type is, they are very costly and subjected to high care and maintenance.

How do you calculate the Test indicator’s reading?

Measurement by lever dial gauge is quite simple as a plunger dial gauge. As the lever moves the mechanical indicator starts traveling. an indicator shows relevant results with respect to lever movement.

parts of lever dial gauge

The user should avoid sudden contact with the workpiece surface, over-tightening of contact points, and side pressure.

What is Lever Dial Gauge used for?

Lever dial gauge used to measure variations in height, flatness, or roundness. It usually combined with a Digital height gauge or Vernier Height gauge to fix the same measuring force.

Therefore lever dial widely used in manufacturing industries, laboratories and in workshops.

The main manufacturers of this gauge are Mahr, Mitutoyo, Baker etc which is known for its quality product.

Dial Thickness Gauge

The gauge uses to check the thickness of an object. Dial thickness gauge uses a Dial Indicator for comparison. 

It consists of a sturdy, rigid frame made of hard aluminum with a lifting lever for the movable upper measuring spindle. 

dial thickness gauge

Dial Thickness Gauges are used for measuring the thickness of a very wide range of materials such as leather, paperboard, paper, rubber, glass, sheet, metal, films, plywood, and plastics.

Dial Thickness gauge has an accuracy of 0.01 mm. It has a flat measuring faces used for measuring soft material such as plastic films, felt, rubber, paper, etc. 

parts of dial thickness gauge

The gauge graduation is represented in millimeter and micron.

Another type of face is spherical measuring faces for measurement of a hard material such as sheet metal, hardboard, wooden panels, and panes of glass.

Thickness Gages offer a quick and efficient means of inspection with their convenient grip handle, thumb trigger, and springloaded spindle.

application of dial thickness gauge

Contact points are made of hard metal. Tolerance marks in the dial make for easy reading and accurate measuring results.

They are very handy!

These Dial Caliper Gages are comparison gages, and should be used in conjunction with a Setting Ring or a micrometer. The caliper is spring loaded and makes point contact at constant measuring force

digital thickness gauge

Dial Gage Stands are designed for comparison measurements of size using a dial indicator or digital Indicator.

Indicators may be used to check the variation in tolerance during the inspection process of a machined part, measure the deflection of a beam or ring under laboratory conditions, as well as many other situations where small measurement needs to be registered or indicated

long dial thickness gauge

Dial gauge with well-balanced frames and handgrips coupled with lightweight make these gauges easy to use for measurement.

Back to: Introduction to Dimension Measurement

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