Instruction Manual Section Five
CHAPTER 10
Grinding Cutters with Spherical Ends
or Corner Radii
INTRODUCTION TO THE FIXTURE
(LETTER DESIGNATIONS REFER TO PHOTOS 43, 44, and 45; NUMBERS ARE
FROM FIGURE 45A.)
The K. O. Lee Radial Grinding Fixture is a precision bearing instrument for gen-
erating convex or concave radii on cutting tools. By means of its own Crossfeed
(A) and longitudinal (B) feed screws which control the corresponding Lower Slide
(35) and Upper Slide (52), work held in various fixtures can be positioned ahead
or back of the Pivot Point Vertical Axis of the fixture in order to grind prede-
termined convex or concave radii. This pivotal axis is identified by the vertical
edge of the knife Center Gauge (see Photo 43) or intersecting surfaces of the
'V Center Gauge wheel either is positioned in the self-locking taper of the Pivot
Stud (49) after removal of the Cap for Center Gauge (40). The feed screw dials
are graduated in thousands-— .050 inch to a revolution of the handwheel—and
are adjustable for desired 0 settings. Since the Saddle (50), on which the fixture
bearing rests pivots around a vertical axis on a horizontal plane, it is possible to
tilt by means of Adjusting Screw (4) the whole fixture back away from the wheel
a fixed number of degrees for the purpose of setting clearance directly on the end
of a cutter. The extent of the circumference of radius that can be generated is
unlimited as the Fixture Turn Table (41) can be swiveled 360 degrees (RELATIVE
TO THE SADDLE) about the Pivot Point Vertical Axis when the Table Adjusting
Screws (E) are removed. The Turn Table (41) is calibrated in degrees. The
Upper Slide and Lower Slide of the fixture can be locked by tightening their Gib
Lock Screws (D). A Lever Arm (F) is provided to tilt the fixture further away
from the wheel during the grinding process to allow indexing of the cutter or ob-
servation of grinding results.
OPERATING INSTRUCTIONS
Three typical set-ups using the Radial Grinding Fixture are presented below to
acquaint the operator with its great versatility. Set-up photos show the radial
fixture on the B6062 model grinder; however, it can be mounted on any of the
other K. O. Lee grinders. When it is mounted on the B300 or B350 grinder series,
no cutter larger than 4 inches in diameter should be mounted on either the BA985
or the BA986 fixture. The BA985 fixture will mount cutters up to 12 inches in
diameter on machine of model size BA900 and larger, however the maximum diam-
eter for these machines is reduced to 9¼ inches when the BA986 fixture is in use.
I GRINDING A CORNER RADIUS USING BA985 RADIAL GRINDING FIXTURE
A. Mount the BA985 fixture in approximately the center of the table, with spring-
loaded locking screws and nuts (NUMBERS 42, 43 and 38) facing to the
rear of the table slide, as shown in Photo 46. Secure the fixture to the table
with two A657 T-slot bolts. Mount either a flared cup wheel or straight
wheel at the left end of the spindle. Grind against a small edge on the face
of a cup wheel; grind on the periphery of a straight wheel.
B. Remove the Cap for the Center Gauge (40) and install the knife Gauge
-54—
To Next Page
Loading...