N70CB TOOL SPECIFICATIONS
All screws and nuts are metric.
FASTENER SPECIFICATIONS:
This tool uses a wide range of nail sizes in lengths of 1-3/4” to 2-3/4” (44.5 - 70mm) and shank
d
iameters of .099” to .113” (2.5 - 2.9mm)
TOOL AIR FITTING:
T
his tool uses a 1/4 N.P.T. male plug. The inside diameter should be .200” (5mm) or larger. The fitting
m
ust be capable of discharging tool air pressure when disconnected from the air supply. The connector
socket on the air hose should be .275” (7mm) inside diameter or larger.
OPERATING PRESSURE:
70 to 100 p.s.i.g. (4.9 to 7.0 kg/cm
2
). Select the operating pressure within this range for best fastener
performance. DO NOT EXCEED THIS RECOMMENDED OPERATING PRESSURE.
AIR CONSUMPTION:
The N70CB requires 7.7 cubic feet per minute of free air to operate at the rate of 100 nails per minute,
at 80 p.s.i.g. (5.6 kg/cm
2
). Take the actual rate at which the tool will be run to determine the amount of
air required. For instance, if your fastener usage averages 50 nails per minute, you need 50% of the 7.7
c.f.m. which is required for running at 100 nails per minute.
BOSTITCH OFFERS TWO TYPES OF OPERATION FOR THIS SERIES TOOL
CONTACT TRIP
The common operating procedure on “Contact Trip” tools is for the operator to contact the work to
actuate the trip mechanism while keeping the trigger pulled, thus driving a fastener each time the work
is contacted. This will allow rapid fastener placement on many jobs, such as sheathing, decking and
pallet assembly. All pneumatic tools are subject to recoil when driving fasteners. The tool may bounce,
releasing the trip, and if unintentionally allowed to recontact the work surface with the trigger still
actuated (finger still holding trigger pulled) an unwanted second fastener will be driven.
SEQUENTIAL TRIP
The Sequential Trip requires the operator to hold the tool against the work before pulling the trigger.
This makes accurate fastener placement easier, for instance on framing, toe nailing and crating
applications. The Sequential Trip allows exact fastener location without the possibility of driving a
second fastener on recoil, as described under “Contact Trip”. The Sequential Trip Tool has a positive
safety advantage because it will not accidentally drive a fastener if the tool is contacted against the
work – or anything else – while the operator is holding the trigger pulled.
MODEL IDENTIFICATION:
Refer to Operation Instructions on page 7 before proceeding to use this tool.
CONTACT TRIP SEQUENTIAL TRIP
Identified by: Identified by:
BLACK TRIGGER GRAY TRIGGER
OPERATION
-4-
MODEL
TOOL
LENGTH HEIGHT WIDTH WEIGHT
OPERATION
N70CB-1 Contact Trip (12-1/16”) 306mm 12-11/16”) 322mm (5-9/16”) 140mm 7b. 14oz. (3.6kgs.)
N
70CB-2 Sequential Trip (12-1/16”) 306mm 12-11/16”) 322mm (5-9/16”) 140mm 7lb. 14oz. (3.6kgs.)
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