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Power and Construction
The JET JFM-5 Hollow Chisel Mortiser is equipped with a 1HP, TEFC
(totally enclosed fan cooled) motor that delivers smooth, consistent power.
The motor comes wired for 110V (11 amp) operation but can be converted
to use 230V (5.5 amp) electrical power. The motor produces a (direct
drive) spindle speed of 1725 rpm and is controlled by an industrial style
push button On/Off switch, mounted on the powerhead for fast, easy
access.
The powerhead has a full 8” stroke (Z-axis) controlled
by a rack and pinion drive system that is as durable as it
is precise. A 24”-long, solid steel operating arm affords
the leverage necessary to cut even large numbers of
mortises in the toughest of materials with ease. The arm
attaches to the pinion shaft using a repositionable hub so the arm can be set for
the most comfortable stroke regardless of material thickness.
The 1 Hp motor and
easy to use switch
provides the power and
control you need.
A tool-free depth stop rod is built into the powerhead casting. Because the
depth stop is located close to the line of force, deflection of the bit when the
stop rod contacts its seat is virtually eliminated. This means a higher level of
accuracy, cleaner mortises and extended bit/chisel lives.
Easy Bit Changes
The tool-free depth
stop is mounted
close to the line of
force so there is no
deflection of the
bit.
A pair of hinged doors, one on either side of the powerhead provides easy
access to the high quality, ½” capacity, key-operated, 3-jaw chuck. An
extended chuck key is included that makes installing or removing the
auger bits fast and easy. The chuck is designed to be compatible with the
common long-shank auger bits. However, a chuck extender is included
that allows using short shanked auger bits.
The powerhead housing below the chuck is bored to accept special
(included) bushings that accommodate chisels with 5/8”, ¾” and 1 1/8”-
diameter shanks. These bushings are compatible with our JET
auger/chisel sets in 1/4", 5/16", 3/8", 1/2", and 3/4" sizes. JET
auger/chisel sets in the above sizes are available individually or in a set
from your favorite JET dealer.
Swing down doors on
both sides provide easy
access to the chuck for
working with the auger
bits