Champion
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330
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Page 3
05/12/17
9.
FEED TUBE HOUSING
The feed tube housing is aligned in the main bore of the hammer. It sits against a
shoulder in the case and is held in position by the backhead and belleville washer
combination. The feed tube housing locates and aligns the feed tube.
10.
FEED TUBE
The feed tube supplies air to the piston. It seats on a shoulder in the feed tube housing
and is designed with a long bearing surface to maintain alignment in the feed tube
housing.
11.
CHOKE
The interchangeable choke is located in the tip of the feed tube and is held in place with
a press fit. A set of two chokes is supplied with each hammer. By installing the correct
choke, the hammer can be fine tuned to the compressor package.
12.
PISTON
The piston functions as the only moving part in the hammer, controlling the operational
air cycle. The percussive action of the piston striking the bit transfers the energy through
the bit in order to fracture rock formations.
13.
CASE
The case is designed to contain the internal parts which make up the hammer
assembly. The case is hardened to resist wear and to extend life in abrasive conditions.
14.
BIT BEARING
The bit bearing guides the top end of the bit to insure proper alignment between the
piston and the bit. The bit bearing is positioned into the chuck end of the case and is
held in place by the snap ring.
15.
SNAP RING
The snap ring sits in a groove in the case and retains the bit bearing.
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.
