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04/21/20
Champion
®
RC300
16. BIT RETAINING RINGS
The bit retaining rings are designed to allow the bit to move between the drilling and
cleaning positions and prevent the bit from coming completely out of the hammer.
The bit retaining rings consist of two matched halves and are held together with the bit
retaining ring o-ring.
17. THRUST WASHERS
Two brass thrust washers, one located between the backhead and the case and one
between the chuck and the case, provide for easy disassembly.
18. CHUCK
The chuck threads into the bottom end of the case with a large cross section thread
form. It has internal splines that transmit rotation to the bit through a set of delrin drive
plates.
19. 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 the chuck.
20. 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 (12) is sent with each bit.
Summary of Contents for Champion RC300
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