Thread Dial Indicators to fit Boxford as well as South Bend "9-inch" lathes - with either Imperial 8 t.p.i. or metric 3 mm pitch leadscrews.
The "inch" model has a single gear, the "metric" version - to obtain a wider threading range - needs two gears and these are supplied, the spare being carried on the unit. Both are suppled with instructions. These units can also be adapted to fit other lathes with leadscrews having the 8 t.p.i. , 3 mm or 6 mm pitch leadscrews.
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