Norton DR520, Руководство пользователя

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III. MAINTENANCE AND COMPONENT DESCRIPTION
D. Gibs
The gibs are brass wear shims used on the inside of the carriage which
allow the carriage to slide freely and rigidly on the column. The gibs require
periodic replacement. Replacing the gibs is necessary when the carriage is
no longer rigid on the column. Keeping the column free of excess debris
and burrs will maximize the service life of the gibs.
E. Motor Spindle
The motor spindle on all core drill motors is equipped with 1-1/4"-7 thread
dimensions. The end adapter of the core bit is also threaded 1-1/4"-7 on
core bits of 2 inches and larger diameter. Core bits with a diameter less
than 1-5/8 inches have 5/8”-11 threads and require the use of an adapter.
The motor spindle maintenance should be performed each time the
machine is stored for the day. Leaving the core bit on the motor spindle
may cause the threads on the spindle to rust making removal of the core bit
very difficult. After removing the core bit check the threads for any nicks or
burrs. The spindle should then be cleaned with a mild solvent and
lubricated with a lightweight machine oil.
Removing the core bit from the motor spindle by turning the core bit barrel
is not recommended. The core bit barrel may break the weld between the
adapter plate and barrel if excessive side pressure is applied. The best
results are achieved using two wrenches. One of the wrenches placed on
the machined flats on the motor spindle and the other wrench on the core
bit end adapter.
F. Vacuum Seal
The vacuum seal is the sponge rubber gasket which lines the bottom of the
large vacuum base. The material prevents air from entering the area under
the base. Thus allowing the vacuum to pull against the work surface. In
order for the seal to work properly the seal material must remain pliable and
in one piece with no gaps or inconsistencies on the surface. The vacuum
seal should be rinsed at the completion of each operation. Allowing the
slurry to accumulate on the gasket will cause the material to deteriorate
prematurely. The vacuum seal should be checked on a regular basis and
replaced if it has been damaged or started to deteriorate.
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