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THE CUTTING OPERATION / REPLACING THE CUTTER
General Operating Sequence
WARNING: Do not install or remove keys unless
the off/on switch is in the off position. Always wear
eye protection when operating this machine!
1. Rotate both vise jaws to the station suitable for the
key being duplicated.
2. Insert the blank key and pattern key into the vise jaw
using the appropriate method described under
"Aligning Keys in the Vise Jaws". Be sure that both
keys are laying level in the vise jaws and are not tilted.
3. After
the
keys
are
aligned, move the car-
riage lever to the right
(clockwise) until the
cutter guide is slightly
left of the cut closest to
the head of the pattern
key (see Fig. 7).
4. Press the off/on switch
to the "on" position.
5. Push down on the
carriage handle while
pulling out on the carriage trigger (See Fig. 8).
Figure 8
This will allow you to ease the carriage up into cutting
position. Take care to ensure that the carriage does not
"slam" forward as this will result in probable cutter
damage. Remember, best results are obtained if the
cutter guide makes initial contact slightly left of the cut
closest to the head of the pattern key. Do not permit
the cutter to touch the shoulder of the key blank.
12
Figure 7
Carriage
handle
Trigger (pull out to
release)
6. The carriage movement is controlled by the carriage
lever. Using slow to moderate speed, smoothly move
the carriage lever to the left (counter clockwise).
Avoid using an erratic, jerking movement! Once the
cutter is at the tip of the key, move the carriage to the
right by moving the carriage lever clockwise. This will
result in a second cutting pass over the key blank.
STOP before cutter contact with the shoulder of the
blank occurs.
7. Press the off/on switch to the "off" position and
remove finished key by pushing down on the carriage
handle until the trigger clicks into place. Then loosen
wing nut to remove duplicate key.
8. To deburr the key, turn the machine on, and position
the cut key lightly against the rotating deburring
brush,
Replacing the Cutter
The CU20 cutter used on this machine is .250" in diam-
eter, .093" thick and has a
made out of high speed steel. It has a flat left side, which
is excellent for making deep cuts, when these cuts are
next to the shoulder, such as on GM, Chicago, etc. No
warranty is placed on the cutter, operators should treat it
with care and avoid harsh usage. Do not force the car-
riage up, causing the key blank to bang into the cutter,
and do not apply heavy pressure when cutting. Also, do
not let the cutter run into the vise jaw; this will dull the
cutter quickly.
As with any metal cutting instrument, the CU20 will dull
with usage. There are three ways to tell when a cutter is
dull and requires replacing:
1. Time - a dull cutter takes longer to make the cuts.
2. Sound - a dull cutter will emit a shrill sound as it runs
across the key blank.
3. Burrs - a dull cutter will not cut away the metal but
will roll it away. When this occurs, there will be a
buildup of metal burrs on the underside of the key. If
this buildup is heavy, the cutter is dull. A sharp cutter
leaves little or no burrs.
To replace the cutter, use two wrenches, one
for the cutter nut and one
Set the two wrenches in position and loosen the cutter
nut. Note that the cutter nut has a reverse thread and
turns downward to loosen. Remove the spacer washers
and the dull cutter. Install the new cutter, the washers,
and the nut.
⁄
" hole. It's a milling cutter,
1
2
3
⁄
" wrench
4
⁄
" wrench for the cutter shaft.
1
2
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