A-A-52553
2.3 Design and construction. The hammer design and construction shall be representative of a standard commercial nail driver with a proven history of durability and performance, which also meets the requirements of this CID.
2.3.1 Lubricatoin. All moving parts shall be provided with suitable means of lubrication. Oil shall be supplied by a separate line oiler. The hammer shall operate as specified herein when lubricated with a proper lubricant.
2.3.2 Handle assembly. The handle shall consist of the handle, the throttle valve assembly, trigger or throttle control assembly, and air inlet. The handle shall be of the open pistol-grip type with thumb throttle control. An air inlet strainer (20 mesh or finer) with internal 1/4-18 NPT shall be attached to the air inlet in the handle.
2.3.3 Barrel. The barrel shall contain the valve mechanism piston. The valve mechanism pistol shall function to control the flow of air into the barrel to activate the piston.
2.3.4 Retainer and nail-driving tools. The retainer shall be attached to the barrel and shall hold the nail-driving tool in position to receive the blow of the piston. The nail-driving tools furnished shall be sufficient to drive the sizes of nails and spikes specified in 2.4.1.
2.4 Performance. The hammer shall operate as specified herein at air pressures from 70 to 100 pounds per square inch (psi) (482 to 689 kilopascals (kPa)).
2.4.1 Capability. The hammer shall be capable of driving nails from 10d to 60d, and spikes up to and including 0.38-inch (9.5 millimeters (mm)) diameter, into well-seasoned hardwood that has pre-drilled pilot holes of the same length as the spike and 0.06 inch (1.6 mm) less in diameter than the spike, without bending more than 20 percent of any one size of nail or spike. Both nails and spikes shall be driven flush with the surface of the wood.
2.4.2 Air consumption. Air consumption of hammer shall not exceed 35 cubic feet per minute (16.5 liters per second) while the hammer is operating at full load at an air pressure of 90 psi (620 kPa) at the tool.
2.5 Safety. Guards and other appropriate protection shall be provided for the operator(s) of the hammer in accordance with appropriate Department of Labor Occupational Safety and Health Administration Standards.
2.6 Treatment and painting. Unless otherwise specified (see 6.2), all exposed surfaces of the hammer shall be treated or painted in accordance with the supplier’s standard practice.
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