Bostitch F21PL Original Instructions Manual page 6

Always check that the Lower Contact Arm or Metal Connector Attachment moves freely before using tool. If any binding occurs,
repeat assembly procedure or have tool serviced at an authorized Bostitch service center.
SEQUENTIAL TRIP - F21PL, F33PT, F28WW, N89RH17-2, N89RH17-2MCN
Your new F21PL/F33PT/F28WW/N89RH17-2/N89RH17-2MCN comes fitted with Sequential trip as standard (Grey trigger)
1. This offers positive safety advantages since it will not accidentally drive a nail if the tool is bumped against any surface or
anybody while the operator is holding the tool with the trigger pulled.
2. Allows Place Nailing without the possibility of driving a second nail on recoil.
The sequential trip gets it name from the "sequence" required to operate the tool. To drive a nail, the operator must first depress
the trip against he work and then pull the trigger. To drive a second nail, the operator must lift the tool from the work, release the
trigger, and the repeat the above sequence.
As accurate placing is required for applying Metal Connectors, and the reasons above the F21PL/N89RH17-2MCN must NOT
be converted to a contact trip model.
Warning! To avoid serious injury from fasteners and flying debris when installing metal connectors with the
F21PL/N89RH17-2MCN:
●
Always use the Metal Connector Attachment. (see installation instructions).
●
Only use sequential trip(grey trigger).
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Use only genuine Bostitch metal connector nails.
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Use only one stick of metal connector nails at a time.
●
Metal connector nails are not designed to penetrate metal. When installing metal connectors, always place the Metal
Connector Attachment Guide in the metal connector's preformed hole before attempting to drive a fastener. (Fig 3 & 4)
TOOL TRIP OPERATION:
All tools with a safety trip are marked with an inverted equilateral triangle (▼). Do not attempt to use a tool marked in this
way if the safety trip is missing or appears damaged.
SEQUENTIAL TRIP
(Reference 2 in Technical Data Table, column L)
The sequential trip requires the operator to hold the tool against the work with the safety trip depressed
before pulling the trigger. In order to drive additional fasteners, the trigger must be released and the tool
lifted away from the work, before repeating the above mentioned steps. 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
GREY TRIGGER
under Contact Trip (below). 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.
CONTACT TRIP (SERIAL NUMBER 07315XXX ONWARDS)
(Reference 1 in Technical Data Table, column L)
The common operating procedure on "Contact Trip" tools is for the operator to actuate the safety trip
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 safety trip and if
BLACK TRIGGER
unintentionally allowed to re-contact the work surface with the trigger still actuated (finger still holding
the trigger pulled) an unwanted second fastener will be driven.
These tools are labeled with a "do not use on stairs or ladders" symbol. Technical Data Table Illustration.
Tools marked with this symbol must not be used where changing from one working position to another
involves the use of ladders, stairs or similar structures such as roof laths.
FASTENER DEPTH CONTROL ADJUSTMENT (FIG 5)
The Fastener Depth Control Adjustment feature provides control of the nail drive depth from flush with or just above the work
surface to shallow or deep countersink.