PRECISION MEASURING AND GAGING - OD1642 - LESSON 1/TASK 2
(8) Universal Bevel. The universal bevel (figure 7), because of the
offset in the blade, is very useful for bevel gear work and for checking
angles on lathe workpieces which cannot be reached with an ordinary bevel.
The universal bevel must be set and checked with a protractor, or another
suitable angle-measuring device, to obtain the desired angle.
FIGURE 7.
UNIVERSAL BEVEL.
(9) Cutter Clearance Gage.
The cutter clearance gage (figure 8 on
the following page) is one of the simplest gages to use, yet it is suitable
for gaging clearance on all styles of plain milling cutters which have more
than 8 teeth and a diameter range from 1/2 inch to 8 inches.
To gage a
tooth with the instrument, bring the surfaces of the "V" into contact with
the cutter and lower the gage blade upon the tooth to be gaged. Rotate the
cutter sufficiently to bring the tooth face into contact with the gage
blade.
If the angle of clearance on the tooth is correct, it will
correspond with the angle of the gage blade.
Cutter clearance gages that
have an adjustable gage blade for checking clearance angles of 0ƒ-30ƒ on
most common cutter styles are also available.
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