8/14/2019 Grinder Auto
3/3
angle, it -is best to drill them with a-in. bit, and then.
enlarge them with aearner. In order to tighten the bolts ef-ively,
sleeves are cut from M-in. pipeplaced over the threaded ends of
thebetween the kt-iron supporting barsthe housing as in Figs. 4 and
6. Oneof each sleeve is beveled so that it fitsugly against the
housing. The assemblyf the wheel guards is shown in Figs. 89, the
latter giving the essential di-sions. The wheel guard is bolted
tosupporting bar at the back. It is notened to the housing. The
balance ofassembly for the floor-type grinderoverhead belt drive is
clearly shownig. 5, while the bench type is shown
y requires that the speed of 12-in.g .wheels should not exceed
2,0001,800 r.p.m. is better for a wheeldiameter. Smaller wheels can
beproportionatelyhigher speeds.
f you have occasion to use a drill that issmall to fit pour
brace, slip a piece of
Indicator for Setting TailstocOf Lathe at Zero PositionAfter
turning a taper on work by meansof the tailstock setover method,
you canmove the tailstock back to align the cen-ters without lossof
time if this in-,dicator is used. Itconsistsof a sheet-metal
pointer piv-oted to a pin in the.lathe bed, and a.,length of spr
ingwire, which is fas-tened rigidly int h e p i n a n dwrapped
around
wire causes the pointstop pin in the tailstocfollows the pln. A
f t rperfectly, mark the poend on the tailstockThen if the
tailstockit back to bring theand !he centers will.
