HOWA MACHINERY H3EF, Instruction Manual, Page: 29 / 52

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Introduction
1. This instruction manual describes the HIGH SPEED type 3-jaw draw down power chuck
H3EF (standard model).
2. Please read this manual carefully and fully understand the procedures for installation,
operation, inspection, and maintenance before operating the chuck.
3. Ignoring any instructions in this manual may result in a serious accident or machine damage,
leading to injury to the operator or personnel near the machine.
4. Always keep this manual handy and use care not to lose it.
5. Please contact us (phone and fax numbers are shown below) for information regarding this
manual and the objective product. Another copy of this manual is also available from the
following address:
HOWA MACHINERY, LTD.
MACHINE TOOL ACCESSORIES TEAM
SALES GROUP
CREATIVE ENGINEERING DIVISION
MACHINERY DEPT
1900-1, SUKAGUCHI, KIYOSU, AICHI, 452-8601 JAPAN
Phone : International access code-81-52-408-1254
Facsimile : International access code-81-52-409-3766
6.
The values of this manual are described in SI unit system. Values of former unit system
can be obtained by following calculations.
Pressure 1MPa=10.197kgf/cm
2
Force 1kN =101.97kgf
Torque 1N
･
m=0.10197kgf
･
m
Safety Information
This manual contains warning messages for safe operation that are indicated by Safety Alert
Symbols. Carefully read and fully understand these messages.
The danger levels of the Safety Alert Symbols are defined below:
Indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury. These warning massages
include the preventive actions those are indispensable to avoid
danger.
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury. These warning massages
include the preventive actions those are indispensable to avoid
danger.
Indicates a potentially hazardous situation which, if not avoided,
could result in minor injury or machine damage.
There are many hazardous situations that may occur during operation, inspection, and
maintenance of the chuck used under various circumstances. We cannot predict all of these
hazards.
Accordingly, the warning messages described in this manual do not cover all the hazardous
situations.
Also, there are too many things that are impossible or prohibited in chuck operation to describe
completely in this manual.
We cannot assume any responsibility for any damage or accidents caused through operation,
inspection, or maintenance that is not specified in this manual.
DANGER
WARNING
CAUTION