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De Vallière H.130C/140G
De Vallière Home   De Vallière H.140E

The ingenious and neatly designed taper turning attachment could be brought into operation without the need to disengage the cross feed nut from its screw. The unit was also able to turn taper threads and against simple templates -  the makers offered a range of standard profiles. including those for the common sizes of Morse taper. If any owners had detailed knowledge of exactly how to work the taper unit, the author would be very pleased to hear from them.

The No. 3 Morse taper barrel of the tailstock had a travel of 180 mm (7") and, even when fully extended, a good proportion of it (150 mm/6") remained fully supported within the casting.