The lower-power 2-speed motor (2-1.6 hp) was dropped and the original high-power unit (3-2 hp) became the standard fitting with a 4-2-8 hp motor introduced for the high-speed version-although the spindle speeds remained, as before, at 24 to 1000 rpm and 38 to 1600 rpm. On the Celtic 14 the same changes were made to the screwcutting arrangements as on the 12. The cross slide travel was increased by one inch, to 7.5', and the option of a low-power motor for training establishments (1.3-0.9 hp) was dropped and only the two more powerful options (2-1.6 hp and 3-1.9 hp) retained. The Celtic 12 was given an extra range of metric threads - the original 27 settings from 0.25 to 10 mm pitch being improved to 49 from 0.225 to 10 mm pitch - although the rest of the gearbox, together with the sliding and surfacing feeds, remained unchanged. 2 Celtic lathes look significantly different to (and very much more 'modern' than) the original versions however, underneath the new clothes were the old machines with almost identical mechanical specifications and nearly the same performance. Mondiale Home Page Mondial e Simplex Lathes Celtic 12Ĭeltic 14 Celtic 17 Celtic 20 Mk.2 Celtic LathesĪ manual for the 17N and 20N can be ordered hereĪ good deal of clever work went into making the Mk.

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Celtic 14 lathe manual