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Digital Vernier Calipers

to see the example verniers, click here

Back to Whittam Page

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Since 1860!

Highest Precision!

Best Quality
and now

with full Engineering

Our engineering expertise is available
to provide
technical support
for the products
we sell; and assist
our customers
in solving
their engineering


Whittam was
founded in 1860 and over the years have established and maintained an exceptional
reputation for
providing high
quality precision
products to the
whole spectrum

of industry all over the United States, Canada and Mexico as well as in Europe and Australia.

Our Whittam
precision scales
(rules), verniers and dials have various uses and are in demand by machine tool and instrument makers, scientific, meteorological and medical
establishments, graphic art and
companies as well as the printing,
engraving and automotive industries. They are known to be called machinist's or engineer's rules(rulers). In fact, they can be used by anyone who wants to do a good job accurately.


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How to read a Vernier Scale
(Using Verniers)


To read a vernier scale to 1/50 mm or 0.020 mm, the vernier scale must have 49 mm divided into 50 equal spaces for use with 1.0 mm graduations on the true (or main) scale ( click here to see our example of verniers in a pop up window) or go to the example page and print it out for your reference.

First, look at the metric example.  The vernier "0" is between 30.4 cm (304mm) and 30.5 cm (305mm).  To determine the precise location, count across the vernier from "0" to see which line exactly coincides with a line on the true (or main) scale.  It is the 33rd line.   Therefore, the correct reading to 1/50mm is 304.00mm + 33 x .02mm = 304.66 mm (or 30.466 cm).

Likewise, for the inch vernier, to read to 0.001", one must have 50 graduations on the vernier over 49 spaces of 1/20" (or 0.05") graduations on the true (or main) scale (1/50 x 1/20 = .001").

Now, look at the inch example.   "0" on the vernier is between 12.000" and 12.050" on the true scale.  Count from "0" to the first line that coincides exactly with a line on the true (or main) scale which is the 8th.  Therefore, the correct reading is 12.000" + 8 x 0.001" = 12.008".

Other combinations of main scale graduations and vernier graduations are possible for both inch and metric reading for these or other resolutions.  For example, for 1/10 mm (0.1mm) resolution, one needs only 10 graduations on the vernier over 9 (1mm) graduations on the main scale (1/10 x 1 = 0.1mm resolution, etc...

For angular verniers, the same principle applies.  For 1/10 (0.1), one may have the main or true scale divided into 360 x 1 increments; and the vernier divided into 10 graduations over 9 of the main scale.   The reading is the same as for linear scales.

Likewise, angular verniers can be used to accurately read degrees, minutes or military units.


Click here to go to
RFQ--Request for Quotation Page
on our Whittam Scales, Verniers & Dials


Schlenker Enterprises, Ltd.
P.O. Box 9277
Lombard, IL  60148-9277, USA
708-449-5700 (Phone)
708-449-5703 (Fax)

E-Mail: sales@schlenkent.com


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