Instruction Manual Section Five
CHAPTER 12
Sharpening a standard tap. Sharpening a 2
½"
tap.
Salvaging a broken
tap.
Grinding
the flute
of a
tap.
PHOTO 55 PHOTO 56
INTRODUCTION TO THE FIXTURE
The K. O. Lee B947 Tap Grinding Fixture is designed to accommodate taps from
No. 0 size to 254 inches in diameter, two to six flutes, with available components.
It is adaptable to any make of tool grinder and can be mounted on a surface grind
ing machine as well. The fixture has a horizontal and vertical swivel, graduated
in degrees — 90 degrees either side of center. The base swivel will allow 360
degree rotation, while the vertical plane swivel has a maximum swivel of 30 degrees
either side of the center.
The fixture will sharpen taps, salvage broken taps, and reform taps for a specific
requirement relative to the grinding of tap flutes, chamfer, and its clearance.
The fixture is designed with positive lift cams, appropriately stamped for the spe
cific tap sizes and number of tap flutes each cam will serve. Index discs are
easily identified and are selected to provide the number of lifts required to corres
pond to the number of flutes on the tap. With simple selection of the proper lift
cam and index discs components, the spindle action of the Tap Grinding Fixture
is positive and ideal for the taps. The collets (B641C) used with this fixture
are standard 5C collets, which can be utilized for other K. O. LEE FIXTURES.
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