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15.
CHUCK
The chuck threads into the bottom end of the case. It has internal splines that mesh
with the splines on the bit body to transmit rotation. A 11-3/4" (298 mm) HD chuck is
available as an optional extra.
16.
CHUCK BUSHING
The chuck bushing is a nylon insert located in the bottom end of the chuck to provide
a bearing surface between the lower bit shank and chuck.
17.
DRIVE PLATES
The plastic drive plates provide wear protection for the splines. They are inserted
between the chuck and the bit. A complete drive plate set is provided with each bit.
Page 4
Patriot
125/125HD
02/09/23
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