Hitachi NR 83A Instruction Manual And Safety Instructions page 10

5. Air cOnsumption
Using the Air consumption table and the Air compressor
size formula, find a correct compressor size.
Air consumption table
psi 80 90 1 OO
Operating pressure (bar) (5.5) (6.2) (6.9)
(kgflcm') (5.6) (6.3) (7)
.062 .075 .088
Alrconsumption ft3/cycle NR83A (1.7) (2.1) (2.5)
(Itrlcycle) NR83AA '062 .075 .088
(1 .7) (2, I ) (2.5)
Air compressor size formula
Amount of air required
=number of Nailers
x average nails driven each minute per Nailer
x air consumption at given air pressure
x safety factor (a[ways I .2)
Example: 2 Nailers (NR83A) operating at 100 psi driving
30 nails per minute
Amount of air required
=2 x 30 x .088 (2.5) x I .2
=6.3 CFM (ft3/min) (180 Itr/min)
After making the calculations as shown above, you should
find a compressor providing 6.3 CFM of air that is required.
LUBRICATION
[t is important that the Nailer be properly lubricated.
Without proper lubrication, the Nailer will not work properly
and parts wiil wear prematurely.
O Use Hitachi pneumatic tool lubricant.
Do not use detergent oil or additives. These lubricants will
harm the O-rings and other rubber parts. This wil[ cause
the Nailer to malfunction.
O Filter-regulator-lubricator units should always be used.
Keep the lubricator filled with Hitachi pneumatic tool
lubricant.
O If a lubricator is not available, supply 2 - 3 drops of Hitachi
pneumatic tool lubricant into the air plug on the Nailer
twice a day.
COLD WEATHER CARE
O Do not store the Nailer in a cold weather environment.
Keep the Nailer in a warm area until beginning the work.
O [f the Nailer is aiready cold, bring it in a warm area and
allow the Nailer to warm up before use.
(1) Reduce the air pressure to 40 psi (2.8 bar
2.8 kgf/cm2).
(~)_ Remove ali nails from the Nailer.
(~) Connect the air hose and free-fire (blank-fire) the
Nailer.
The lowered air pressure will be enough to free-fire the
Nailer.
Slow speed operation tends to warm up the moving
part.
~ CAUTION
O Do not free-fire the Nailer at high pressure.
TESTIN!G THE
NAILER
O Always wear eye protector.
O Never use Nailer unless push lever ls operating
pro periy.
Before actually beginning the nailing work, test the Nailer by
using the checklist below. Conduct the tests in the following
order.
If abnormal operation occurs, stop using the Nailer and
contact a Hitachi authorized service center immediately.
(1) DISCONNECT AIR HOSE FROM NAILER.
REMOVE ALL NAILS FROM NAILER.
[] ALL SCREWS MuST BE TIGHTENED.
If any screws are loose, tighten them.
~~L;_~ir~~, .:
[] THE PUSH LEVER AND TRIGGER MUST MOVE
SMOOTHLY.
Trigger
Push Lever
~
u
~l r~,
C~ ,.
f~~' ' t~~t~)t~~t
~i~~t~~
~'
Do not connect
{~
air hose
~~~~
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