Craftsman 21154-3 Owner's Manual page 15

NOTE: Thearbor h exnut o ntheleftarbor s haft i sleft
hand threaded andisloosened byrotating i tclockwise.
Thearbor h exnut o ntheright a rbor s haft i sright h and
threaded andis loosened byrotating itcounter-
clockwise.
7. Remove theOuter W heel Flange ( H) andthen the
abrasive wheel (I)from thearbor s haft.
CAUTION: The new abrasive wheel tobeputonto the
grinder must h ave a higher R.P.M. rating t han thegrinder
(3400 R.P.M.). Thenew abrasive wheel must h ave the
correct outer w heel diameter andbore diameter as
original wheels. Thelabel ontheside oftheabrasive
wheel must s tay on.DONOT remove thislabel.
8,
Replace the abrasive wheel, outer wheel flange and
arbor hex nut. NOTE: The arbor hex nut on the left
arbor shaft is left hand threaded and is tightened by
rotating it counter-clockwise. The arbor hex nut on
the right arbor shaft is right hand threaded and is
tightened by rotating it clockwise.
CAUTION: DO NOT OVER-TIGHTEN the arbor hex nut
as this may damage the abrasive wheel and cause
serious injury to the operator.
9. Replace wheel cover and knobs.
WIRE WHEEL or BUFFING WHEEL
(Fig. P)
Fig. P
A
B
C
D
E
A wire wheel (supplied, A) or buffing wheel can be
used with your grinder. Depending on the thickness of
the wheel, you will need to add one or more spacers to
allow the arbor hex nut to tighten correctly. These
spacers are identical to each other. Figure P shows the
correct placement of the spacers (B) and (C).
NOTE: One spacer (B) should always go onto the arbor
shaft first. The second spacer (C), if needed, will go on
next to the arbor hext nut (D) as shown. Always use the
wheel flanges (E) that came with the grinder for both
wire wheel and buffing wheels. See section CHANGING
THE GRINDING WHEEL for correct procedure of
changing wheels.
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