email: tony@lathes.co.uk
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Colchester Lathes - Testing
Spares, repair parts and Operation and Maintenance Manuals
are available for most Colchester & Clausing Lathes


COLCHESTER HOME  Bantams Original   Bantams 800, 1600 & 2000 Modern   Chipmaster   
Student 1800   Mascot 1600   Student/Master Mk. 1 & Mk. 2   Student 3100   Master Original 1930s/40s  Master 2500   Triumph Mk. 1 & Mk. 2   Triumph 2000   Mascot - 1950s  Mastiff 1400   
           Magnum   Serial Numbers   Outline of Colchester Range as Text Only   Factory  Testing
Catalogue Covers   Early Drive System
   Colchester 1909/14   Colchester 1919   Colchester 1920s



For a period during the 1960s and 1970s, every larger Colchester lathe was issued not only with a standard inspection form (shown at the bottom of the page) but a certificate showing the results of testing a turned sample on a Talyrond machine. This ingenious device (one of several types of high-precision testers made by the Taylor-Hobson Company and widely used throughout industry) was able to produce a trace that depicted, using an exaggerated scale, any deviation from true roundness to an accuracy of one-hundredth thousandth

A Ferranti visual tester being used to check inner plates for flatness of a sample from a production batch of screwcutting gearboxes

Inspecting the roundness of a Mascot spindle with a tester that produced a vertical linear read-out.

The Rank Talyrond roundness tester in action and a sample of the read-out chart.





email: tony@lathes.co.uk
Home   Machine Tool Archive   Machine-tools Sale & Wanted
Machine Tool Manuals   Catalogues   Belts   Books  Accessories

Colchester Lathes - Testing
Spares, repair parts and Operation and Maintenance Manuals
are available for most Colchester & Clausing Lathes


COLCHESTER HOME  Bantams Original   Bantams 800, 1600 & 2000 Modern   Chipmaster   
Student 1800   Mascot 1600   Student/Master Mk. 1 & Mk. 2   Student 3100   Master Original 1930s/40s  Master 2500   Triumph Mk. 1 & Mk. 2   Triumph 2000   Mascot - 1950s  Mastiff 1400   
           Magnum   Serial Numbers   Outline of Colchester Range as Text Only   Factory  Testing
Catalogue Covers   Early Drive System
   Colchester 1909/14   Colchester 1919   Colchester 1920s