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Chuck Safety
Trained Operators Only. Using a chuck
incorrectly can result in workpieces coming
loose at high speeds and striking the operator
or bystanders with deadly force. To reduce the
risk of this hazard, read and understand this
document and seek additional training from an
experienced chuck user before using this chuck.
Using Correct Equipment. Many workpieces can
only be safely turned in a lathe if additional
support equipment, such as a tailstock or steady
rest, is used. If the operation is too hazardous
to be completed with the lathe or existing
equipment, the operator must have enough
experience to know when to use a different
machine or find a safer way.
Disconnect Power. Serious entanglement or
impact injuries could occur if the lathe is started
while you are adjusting, servicing, or installing
the chuck. Always disconnect the lathe from
power before performing these procedures.
Handling Chucks. Chucks are heavy and
awkward to hold, especially if they are oily.
A dropped chuck can result in amputation
or crushing injuries and equipment damage.
Always use some kind of chuck cradle, protective
device, or lifting assistance when installing and
removing chucks.
Chuck Key Safety. A chuck key left in the chuck
can become a dangerous projectile when the
lathe is started. Always remove the chuck key
after using it. Develop a habit of not taking your
hand off of a chuck key unless it is removed from
the chuck.
Proper Maintenance.
All chucks must be properly
maintained and lubricated to achieve maximum
clamping force and withstand the rigors of
centrifugal force. To reduce the risk of a thrown
workpiece, follow all maintenance intervals and
instructions in this document.
Speed Rates. Fast spindle speeds increase the
centrifugal force on the chuck and workpiece.
Excessive centrifugal force can cause the chuck
to lose its grip and throw a workpiece, or cause a
chuck to break apart with deadly consequences.
Use slow spindle speeds when ever possible,
take all safety precautions, and double check
the workpiece for proper clamping and support
before starting the lathe.
Chuck Capacity. Avoid exceeding the capacity of
the chuck by clamping an oversized workpiece.
If the workpiece is too large to safely clamp
with the chuck, use a faceplate or a larger chuck
if possible. Otherwise, the workpiece could
be thrown from the lathe during operation,
resulting in serious impact injury or death.
Clamping Force. Inadequate clamping force can
lead to the workpiece being thrown from the
chuck and striking the operator or bystanders.
Maximum clamping force is achieved when the
chuck is properly maintained and lubricated, all
jaws are fully engaged with the workpiece, and
the maximum chuck clamping diameter is not
exceeded.
Entanglement. Entanglement with a rotating
chuck can lead to death, amputation, broken
bones, or other serious injury. Never attempt to
slow or stop the lathe chuck by hand, and always
roll up long sleeves, tie back long hair, and
remove any jewelry or loose apparel BEFORE
operating.
Long Stock.
Long stock can suddenly whip
violently when the lathe is started, or without
warning during lathe operations causing death
or serious impact injury. Always use additional
support with any workpiece that extends from
the chuck or the end of the outboard spindle
more than three times the workpiece diameter.
-2-
Mfg. Since 1/11
Model SB1224
INSTRUCTIONS