Nail Driving Force - Hitachi NR 90AD Technical Data And Service Manual

5-4. Nail Driving Force

Figure 2 shows by type of wood and nail, the nailer output energy provided by the supply pressure and the nailing
energy required for driving the nail flush. Air pressure which exceeds the intersecting point between the nailer
output energy and the nailing energy required for driving the nail allows the nail to be fully driven.
For example, when driving a nail of 3.3 mm dia. by 90 mm length (0.131" x 3-1/2") into nine sheets of 12 mm
plywood (108 mm thick ) with the Model NR 90AD, a pressure of about 6.8 bar (6.9 kgf/cm
nailer to drive the nail flush with the wood surface. A pressure beyond this value causes the nail head to be driven
below the wood surface. Fig. 2 should be used as reference data because those values vary depending on the
type, moisture content, and grain of wood.
Required nailing energy
12 mm (0.47")
plywood x 9
Fig. 2 Required nailing energy and nailer output energy
Nailer output energy
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2 , 99 psi) allows the
NR 90AD
NR 83AA3, P, Q