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Hand Drilling Hammers

Hand-Drilling Hammers

Hand-drilling hammers are used to drill steel into rock or to drive wedge and feathers into cracks or drilled holes. There are two types of hand-drilling hammers--single jacks and double jacks. Both have two rounded striking faces with beveled edges to minimize chipping.

Single jacking involves an individual holding a drilling steel in one hand and hitting it with a hammer held in the other. The single jacks have 3- or 4-pound heads and 10-inch handles. The short handle helps you place blows accurately and resists breaking better than longer handles. Engineer's hammers with 3- or 4-pound heads and 14-inch handles can also be used for modified double jacking. An operator sits or kneels near the steel and hammers with both hands while another worker holds the steel. The proximity of both hands to the head required by the 14-inch handle assures that accuracy and safety are not sacrificed. Large double jacks with 6- or 8-pound heads and 36-inch handles are available for experienced drillers. 

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