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There are about 50 different styles of hammers, each one having a trade name. They are of every size, from a tack-hammer, weighting a few ounces, up to the blacksmith's great straight-handled sledge-hammer, weighing twenty pounds or more. Many are named after the trade in which they are used.

Types of Hammers

There are about 50 different styles of hammers, each one having a trade name. They are of every size,…

Such a hammer will deliver a blow at every stroke of the piston-rod, and with sufficient air-pressure will give from 200 to 1,000 blows a minute

Pneumatic Hammer

Such a hammer will deliver a blow at every stroke of the piston-rod, and with sufficient air-pressure…

It consists of a steam cylinder and piston and its rod, and to the rod is firmly secured a steel rock-drill. The cylinder is supported upon a heavy tripod that may stand in any position and present the point of the drill in any direction. The steam or compressed air is conveyed to the cylinder through a hose, and when ready for work it delivers its tremendous thundering blows upon the rock in rapid succession.

Pneumatic Rock Drill

It consists of a steam cylinder and piston and its rod, and to the rod is firmly secured a steel rock-drill.…