Makita AN942, AN922 instruction manual Selecting compressor, Selecting air hose, Lubrication

Selecting compressor

The air compressor must comply with the requirements of

ANSI B19.3 - 1981.

Select a compressor that has ample pressure and air output

to assure cost-efficient operation. The graph shows the

relation between nailing frequency, applicable pressure and

compressor air output. Thus, for example, if nailing takes

place at a rate of approximately 40 times per minute at a

compression of 6 kgf/cm2G(85 PSIG), a compressor with

an air output over 3 ft3/minute is required. Pressure

regulators must be used to limit air pressure to the rated

pressure of the tool where air supply pressure exceeds the

tool’s rated pressure. Failure to do so may result in serious

injury to tool operator or persons in the vicinity.

Nailing frequency (timedmin.)

Selecting air hose

Use an air hose as large and as short as possible to assure

continuous, efficient nailing operation. With an air pressure

of 5 kgf/cm2G (70 PSIG), an air hose with an internal

diameter of over 8.5 mm (5/16”) and a length of less than

20 m (6.6 ft.) is recommended when the interval between

each nailing is 0.5 seconds. Air supply hoses shall have a

minimum working pressure rating of 10.7 kgf/cm2G (150

PSIG) or 150 percent of the maximum pressure produced

in the system whichever is higher.