HOWA MACHINERY H3EF, Instruction Manual, Page: 30 / 52

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Safety Precautions
The following precautions apply to handling, maintenance, and operation of the chuck. Read
and understand them carefully before use.
The table below shows the bolt sizes and their tightening torque.
Tightening torque
Bolt size M6 M8 M10 M12 M16
Tightening torque (N-m) 12.1 29.4 57.9 101 161
Turn off the power before installing, inspecting, or servicing the chuck.
Otherwise, you may be caught in the rotating elements.
Never operate the rotating cylinder selector valve while the spindle is
rotating.
Otherwise, the gripped work piece may come off and fly out.
Never put any part of your body inside the spindle cover while the
spindle is rotating.
Otherwise, you may be caught in the rotating elements.
Route solenoid valves so that the chuck keeps clamping the work piece
even if the power is interrupted.
Otherwise, the gripped work piece may come off and fly out.
Keep the hydraulic pressure constant while the chuck is gripping the
work piece.
Otherwise, the gripped work piece may come off and fly out.
Always operate the chuck within the maximum speed described in the
specification table.
Increase in the chuck speed lowers the gripping force, and the chuck
may lose hold of the work piece.
Securely tighten the bolts with the specified torque.
Otherwise, the bolts may become loose or damaged, resulting in
coming off or flying out of the parts or the work piece.
DANGER
WARNING