What is a Lever Dial Gauges and How to Use It? | Bombay Tools Supplying Agency Pvt Ltd

In this video, you will know the different parts of the Lever Dial Gauge, their features, how the device works, and the additional accessories available.
Bombay Tools Supplying Agency Pvt. Ltd is a leading precision measuring instrument supplier in India since 1942. We are the largest distributors of Mitutoyo in India. Over the years we have become the authorized distributors of other renowned brands like Wyler, Elektrophysik, Kroeplin, Plastiform, Microtech, and many more.
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Video Script
This video will show the right way to use a Lever Dial Gauge, commonly known as the Dial Test Indicator.
Lever Type Dial Indicators are designed to probe surfaces that cannot be reached with a normal dial gauge. It is useful for alignment and measurement purposes.
The parts of the Lever Dial Gauge are the Stem, Dial Face, Bezel, Pointer, and Stylus.
The rest position of the stylus can be adjusted over a range of about 240°. The angle of this stylus relative to the indicator body can be adjusted easily. The stylus can be readily interchanged with another to provide the best match to the job to point size and point material, but ensure that you use the right stylus for the right model because of a small variation in the length of the stylus can affect your reading.
3 important things must be kept in mind
1) The sensitivity is inversely proportional to the length of the stylus fitted i.e., short styli give higher sensitivity
2) The Scale graduation is only correct for certain stylus lengths, due to the cosine effect.
3) The measurement force varies inversely with stylus length
How to use lever indicators?
Test for the direction and extent of movement by pushing gently with a fingertip. Adjust the position of the stylus by gently pushing against the resistance of the friction clutch. Twist the bezel by hand to set the zero point. We can fix it with the height gauge or the Magnetic stands. For this demonstration, I have used a Jafuji Magnetic V holder. Tighten the knob and clamp before measurement.
Let's see how to measure using a Lever Dial Gauge using the concept of runout. Tolerances of runout are usually very small and hence have to be checked with a high-resolution lever dial gauge. Now I have fixed a 1µm Lever Dial Gauge which means every graduation line reads 1µ. The set-up for checking runout requires the use of bench centers so that the workpiece can be rotated on its axis. This is a Jafuji Bench Center. This surface plate was customized especially with the bench centre set up to make our operators work easier, contact us if you would also like a customized bench centre.
Now let's check the runout of this component. I have fixed it between the centers, place the lever dial gauge with minimum pressure on the component, using the bezel set to zero. Rotate the component and check for the runout error. Here it reads 4microns.
There are various types of Lever Dial Gauges available: Horizontal type with a short stylus, Horizontal Type with a long stylus. In the Horizontal 20° tilted face, it is designed for easy viewing of the dial. The dial face obliquely faces upward, allowing users to read the graduations from the user's side. In Parallel type the scale can be read from the front, with the stylus pivoting in a plane parallel to that of the dial face, In Universal type, the direction of the probe can be easily changed
Dial test indicators with ruby contact points are available in the horizontal (Standard type). Artificial rubies are used to enhance the sensitivity of lever indicators by allowing very small bearing areas at the pivot. The benefits of Ruby contact points are more resistant to wear when compared to carbide and can also be used on electrical discharge machines without special precautions.
Let me introduce a few accessories of Lever Dial Gauges
Additional Accessory
• Styli - There are various types of styli available with different diameters with ballpoints like (ø0.5 mm, ø0.7 mm, ø 1 mm, ø2 mm, etc,. Ballpoints are usually made up of carbide or ruby.
• Stems with knurled clamp rings are used to hold the Lever Dial Gauge in the clamps or Magnetic Stands.
• Holding Bars are available in 9x9 mm, 8 mm diameter, etc
• Swivel Clamps, These swivel clamps Can be used with holding bars
• Universal Holder - Using a Universal Holder allows cantering a hole easily the dial face always faces upward when the indicator is rotated.
Hope this information was useful. If you have any other doubts or questions related to a Lever Dial Gauge, feel free to comment below and we will always be available to answer your questions. In our next video let's discuss the tips and usage of other instruments. Subscribe to our channel and hit the bell button to get notifications on our new Videos.

[@anilrema9047]

How to choose the stylus length for particular lever dials.

[@achembusinessidea5306]

Need one lever dial gauge with stand and other tools .
Do you supply surface plate as well??

[@BTSAPvtLtd]

yes we do supply all these items. Can you please send your requirements to [e-mail] please