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R 200S/160H Expander with 110 mm Pilot Guide for Industry
Manufacturer:
Machine-Building Holding OJSC
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Description
New, not used, slotted connection, reamer diameter 200mm, pilot guide diameter 110mm, perifia angle - 35 deg, shape of hard alloy hemisphere, number of blowing holes 3, peripheral row of pins-8x13, frontal row of pins-4x12, length 446mm, weight 29,8kg, thread R32, diameter of pneumatic percussion device 160mm.Drilling is made at pressure of compressed air 0,45-0,7MPa in rocks with coefficient of strength f = 14-16 on the scale of Prof. Protodyakonov
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