TM 9-4910-679-14&P
VALVE SEAT GRINDING EQUIPMENT
STONES-
Seat grinding stones are general purpose stones with
9/16"-16 thread steel inserts. Use the same stone for roughing and finishing cast iron,
soft and alloy valve seats. (For rapid roughing of Stellite faced valve seats, see catalog
for special 9/16"-16 thread insert stones) Diameter, angle, catalog number and
bushing thread size appear on stone blotter.
Refer to Valve Stone and Pilot Handbook, Form 61094, for the proper size
stones for any popular U. S. or Foreign engine.
CAUTION:
Never use stones rated under 12,000 RPM.
STONE SLEEVES- Any of the four Auto-
motive Stone Sleeves will fit any of the Automotive Seat Grinding Stones
All have 9/16"-16threads. The upper end of all Stone Sleeves contains a
hexagon socket (except fig. B which can also be had with a spline socket
to receive a splined driver) which forms a universal joint with hex-ball end
of the Driver spindle.
The Standard and Short Standard Stone Sleeves have long bronze
bushings accurately reamed to fit the upper shank of all pilots.
The Ball-Bearing Stone Sleeve minimizes wear and preserves accuracy
for longer periods by incorporating ball-bearing races between inner and
outer sleeves. The inner sleeve is held on the GRUV- TOP pilot by a
retainer ball fitting in the pilot groove and does not revolve with the outer
sleeve which carriers the Stone.
Cut-away view
of Ball-Bearing
of Ball-Beering
Stone Sleeve,
VALVE STONE DRESSING
Stone and Self-
STAND - Cat - No.-57646
Centering Pilot
in grinding
position.
The Valve Stone Dressing Stand
accurately and safely cleans and trims
all sizes and angles of Stones up to 6"
diameter. Equipped with an accurate
diamond feed, a horizontal adjustment
for various stone sizes, and an angle
indicator marked from 0 to 90 in 1
steps with numbers at 15, 30, 45 and
90 for the most common angle settings.
Stand is complete with a diamond nib
and a stone sleeve mandrel. Rugged
cast iron base for extra strength.
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