Contact or Sequential Trip
Bostitch offers two types of triggers for
pneumatic tools: Contact Trip (black trigger) and Sequential
Trip (silver-gray trigger). Each trigger has specific
advantages. For example, the Contact Trip is best suited for
high-volume, rapid nailing or stapling where exact placement of
the fastener is not important. The Sequential Trip is best
suited for applications where rapid nailing is not required or
where the exact placement of the fasteners is important. You
should evaluate your construction project to determine which
trigger type is best for you.
A Bostitch® tool with the Contact Trip (black
trigger) installed will drive a nail whenever both the trip and
the trigger are depressed at the same time.
The tool can be used to rapidly drive nails by
holding the trigger pulled and repeatedly bumping the trip
against the work to be nailed (Bump Nailing). A nail is driven
each time the trip is bumped against the work.
The Contact Trip (black trigger) will not prevent
a nail from being accidentally driven if the trigger is held,
pulled and the trip is bumped against any object or person.
Never hold or carry the tool with your finger on the trigger
unless driving fasteners.
The Contact Trip (black trigger) can also be
operated by holding the tool against the work with the trip
depressed and then pulling the trigger (Place Nailing).
When using a Contact Trip for Place Nailing, the
tool may bounce due to recoil, and if the tool is allowed to
recontact the work surface while you are holding the trigger
pulled, a second nail will be driven. The operator should allow
the tool to recoil far enough to release the trip and avoid a
second cycle. Don’t push the tool down extra hard; let the tool
do the work.
The Sequential Trip (silver-gray trigger) offers
a positive safety advantage 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.
It also allows Place Nailing without the
possibility of driving a second nail on recoil as described
under “Contact Trip.”
The Sequential Trip (silver-gray trigger) gets
its name from the “sequence” required to operate the tool. To
drive a nail, the operator must first depress the trip against
the work and then pull the trigger. To drive a second nail, the
operator must lift the tool from the work, release the trigger,
and then repeat the above sequence.