Flycutter Setting Fixture Instructions
|The fixture is easy to use if you
will keep two things in mind. First,
when the micrometer tip is in contact with the calibrating gauge and
it is set on zero, the fixture is preset at 1.00 diameter (.500
. So be sure you ADD .500 to any micrometer reading.
Second, the setting fixture reads cutter radius not diameter.
you want to set flycutter for a 2.02 diameter valve relief
the following procedure:
A. 2.02 divided by 2 equals 1.01 which is the valve radius.
B. 1.01 minus
.500 (radius of calibrating gauge) equals .510
C. Set micrometer
at .510 (.500 plus .510 equals 1.01 which is the valve
D. Lock thumbscrew
so setting wont accidentally change.
E. Insert flycutter
holder where calibrating gauge was.
F. Slide cutting
tool out until it contacts the center of the micrometer tip.
G. Lock cutting
tool in place with sets screws and you are reading to go!
micrometer does not read zero when in contact with calibrating gauge
it can be adjusted by holding knurled portion and turning spindle with
spanner wrench (provided). Note:
For accurate setting, hold calibrating gauge in fixture by
pressing down on the top of it to prevent the micrometer from rocking
it. Also, if you will use
the ratchet screw on the end of the mike, it will assure better repeat
calibrating gauge when turning with wrench so you wont force tip