VALVE SEAT GRINDING EQUIPMENT
WARNING: Accessories for your valve reconditioning equipment are de-
scribed in this manual. Use of any other accessory might be hazardous.
DRIVERS-
The spindle incorporates a positive vibrat-
ing action, which lifts the grinding stone
from the seat once each revolution. This
prevents loading the stone, speeds up
grinding and reduces stone wear. All
grinding is concentric, cutting the entire
circumference of the seat and insuring cor-
rect alignment.
The heavy-duty driver maintains high grinding speed with a large, com-
plete range of seat grinding stones.
Alldrivershave an instant-release trigger switch for safety. The switch,
however, may be locked in the on position by depressing the switch locking
buttonwhile the trigger switch is on and releasing the trigger before releas-
ing the locking button.
PILOTS-
Self centering
pilots provide an acCUrate,
rigid axis for grinding with
stones. Two
machined tapers - at the top of
the shank, to fit the top of the
valve guide, and at the bot-
tom, to expand a split sleeve
in the lower end of the guide.
The expanding feature com-
pensates for worn guides and
eliminates a large stock of
oversize pilots, as self-center-
ing pilots expand0.020to 0.030".
The groove
locks the retainer ball
in the ball-bearing stone
sleeve, holding the inner
sleeve stationary and prevent-
ing friction and wear between
sleeve and pilot stem. These
pilots also fit standard stone sleeves.
plug type auto-
For Ford and Lincoln engines with removable valve guides,
motive pilots are available. These pilots fit the valve guide opening and do not expand since
there is little or no wear upon surfaces in these openings.
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