Whilst these articles cover the older, conventionally driven M Series lathes they do not concern the up-to-date models an article about those will have to wait until they become, in some years' time, cheap enough to be accessible to the keener model and experimental engineer.Īn Operating, Service & Parts Manual is available for the M250 Today the range continues in production but fitted with variable-speed drive (though the M300 continues to be available as a geared-head model) with models numbers of: V350, V390, V460 and V550. By the late 1990s the last three machines became, with alterations to centre height, bed length and specification the M390, M460 and M550 - and two newer, larger machines were introduced (though with a short production life), the M600 and M750. The range has been the subject of continuous development and, by the mid 1990s, consisted of the established and largely unchanged M300 model together with the M350, M450 and M500. The digits following the M indicate, in all cases, the swing in millimetres, half the swing being the "throw", more usefully described as the centre height. The Harrison M Series lathes have been in production for many years and considerable numbers of the smaller and very popular models, the M250 and M300, are now in the hands of enthusiastic amateurs and second-user professionals. Instruction & Parts Books are available for most Harrison lathes Older Harrison Lathes Harrison 10AA (Chipmaster)
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