HOWA MACHINERY H3EF, Инструкция по эксплуатации, Страница: 44 / 52

- - 16
4. Maintenance
4.1 Lubrication
The most frequent cause of chuck failure is insufficient or
improper lubrication. If lubrication is insufficient or if a
non-specified lubricant is used, not only will wear be accelerated,
the gripping force will be inadequate, with the possibility of the
work piece coming off during the cutting operation. Adhere to the
following guidelines for lubrication.
After supplying the grease, open and close the jaws for several times without gripping a work
piece.
A drain port is furnished on the periphery of chuck body to discharge the excessive grease.
In case that the grease is fully packed to disturb the smooth movement of draw sleeve, remove
the plug to discharge the excessive grease.
Lubrication Points Recommended
Lubricant
Time of Lubrication
Grease nipples on
outside of chuck
body
MOLYKOTE EP
GREASE
Once every 8 hours,
but where coolant is constantly used,
once every 4 hours.
Recommended oil: MOLYKOTE EP GREASE
(supplied from Dow Corning Corporation)
Insufficient lubrication will lead to lower gripping force and create
abnormal friction and seizure. If the cutting is done in such
conditions, the work piece will come off and may cause severe
injury or death to the operator and/or bystanders. Lubrication with
non-specified lubricants may also permit extraordinary corrosion
and/or wear and will lead to a loss of gripping force.
The operator and/or bystanders may be seriously injured or killed
if improper lubricants are used.
Improper lubricants may reduce gripping force of the chuck and
permit work pieces to fly out of the chuck.
Failure to use an anticorrosive coolant can cause rust build up
inside the chuck that increases friction. This may reduce gripping
force of the chuck and work pieces may fly out of the chuck. This
causes serious injury or death to the operator and/or bystanders,
as well as damage to the machine.
Fig.17
Grease may come out violently from drain port when the chuck is
operated.
Never stand in front of drain port during the operation.
After draining the excessive grease, slip the plug to the drain port
and fasten it tightly.
Operating without the plug cause entering the coolant, cutting tips
or scale into the chuck body.
This causes lower gripping force or seizure of mechanism.
Cutting undertaken in this condition will lead to work piece
disengagement and may causes severe personal injury or death to
the operator and/or bystanders.
CAUTION
CAUTION
WARNING
WARNING
WARNING