Jet Tools JFM-5 User Manual

JET JFM-5 Hollow Chisel Mortiser

Cutting accurate mortises can be a challenging task. The JET JFM-5
Hollow Chisel Mortiser is designed to produce extremely accurate
mortises in a wide range of woods and project designs, plus make this an
easy task for the woodworker. The JET JFM-5 Hollow Chisel Mortiser
has been designed and built to extend its value by maintaining its
performance for many years under the demands of even busy
woodworking shops.

We begin with a heavy-duty cast iron and steel frame for stability,
accuracy and repeatability – not to mention long-term durability.
Precision machining insures accuracy and smooth operation. The liberal
use of cast iron gives the JET JFM-5 Hollow Chisel Mortiser a
stabilizing mass of 267 pounds.

The massive powerhead casting slides on oversized dovetail keyways
that feature easy to use Gib screw adjusters that allow the user to

The JET JFM-5 Mortiser is

as tough as it is accurate

and versatile.

compensate for tiny amounts of wear should that occur in years to come. We also applied Gib
screw adjusters to the X –Y material table motions to provide ultimate control over feel and
long-term accuracy.

Base Cabinet

The JET JFM-5 Hollow Chisel Mortiser is mounted atop an all-steel,
enclosed base cabinet. The cabinet is 14”-wide, 16”-deep, 23 ½”-tall and
features an internal storage area for chisels, related tools and accessories.
The base cabinet puts the JET JFM-5 Hollow Chisel Mortiser table
surface at a comfortable 31 ½” height above the floor. The overall height
of the JET JFM-5 Hollow Chisel Mortiser on its base cabinet is 61”.

If mobility is a priority in your shop, the JET JFM-5 Hollow Chisel

The all-steel base cabinet

has storage for the auger &

chisel sets and related

tools. Add one of our

universal mobile bases and

the JFM-5 easily goes

where you can use it best.

Mortiser
can be placed in one of our universal mobile bases (#708118). The JET
JFM-5 Hollow Chisel Mortiser can then be easily moved to the most
efficient workspace that is available.

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.

A tool-free depth stop rod is built into the powerhead casting. Because the

The tool-free depth

stop is mounted

close to the line of

force so there is no

deflection of the

bit.

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

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.

The 1 Hp motor and

easy to use switch

provides the power and

control you need.

Swing down doors on

both sides provide easy

access to the chuck for

working with the auger

bits