The use of stellite valve-seat inserts in C.F.R. engine cylinders requires means other than lapping to centre the valve seat with respect to the guide and to insure proper valve seating. Experience has shown that a machine grinder, employing a grinding stone rotated on an arbor by a high-speed electric motor, is necessary. ... Seats should be between 0-05 and 0-10 in. in width unless an aquot; interference aquot; angle is used.19 18 aquot; Kwik Way aquot; Valve Seat Grinder modified for C.F.R. engines.
|Title||:||Standard Methods for Testing Petroleum and Its Products|