Opus Metrology

Opus Metrology
Corby NN17 4DR
t: +44(0) 1536 204681
f: +44(0) 1536 205272
e: sales@opus.co.uk
Opus Metrology is the trading name of Thomas Salvesen Enterprises Ltd

Round Length Bars


Length Bars
Opus length bars are carefully manufactured to meet the length, flatness and parallelism tolerances of BS 5317 (metric) and are made from specially selected steel. They have a round section and, with the exception of Calibration Grade bars which have solid ends, they have a threaded hole in the centre  which allows the bars to be safely and accurately joined together in various combinations.

The round section is 22mm which gives them good stability and makes them easy to handle.  The gauging faces are hardened then precision lapped to meet the requirements of the relevant standard..

When wrung together or combined with the connection screws (Grades 1 and 2 ) they provide secure lengths far in excess of that of standard gauge blocks.  The use of the screws allows the length bars to be safely used in the horizontal position as well as vertical, they also allow a range of accessories to be attached.

The length bars can be supplied as individuals or in sets and are currently only available in Grades Calibration, 1 and 2 (metric).  A number of length bar sets are available as illustrated above and as detailed here.

All length bars to grades 1 and 2  can be supplied with an Opus  UKAS calibration certificate.  Calibration grade can only be supplied with an Opus “in-house certificate, please contact us for details. You can view our UKAS schedule here.

Opus Length Bars with Joining Screws

Opus Grade 1 and Grade 2 length bars can be combined together to make secure combination lengths using the provided threaded screws.

The screws also allow the use of various accessories which Opus also manufacture and supply.

Material Characteristics:
Coefficient of Thermal Expansion: 11 1 x 10-6 per C


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