The theoretical
maximum holding or clamping force of a toggle action device is achieved
when the three pivot points are in a straight line. To make allowance
for external forces due to vibration and changing load conditions in
industrial use, the proper amount of over travel of the center pivot
point has been carefully calculated to yield maximum clamping pressure,
while achieving a positive locking position.
All
Good Hand clamps are rated by their "holding capacity".
This rating is the maximum force the clamp will support when locked
in the closed position without creating permanent deformation. This
force is measured at a point closest to the base and diminishes as
the end of the bar is reached. The "clamping force" is defined
as the actual force being applied by the clamp to the work piece.
This rating is not constant due to such variables as the location
of force on the handle, the amount of force the operator applies,
and the location of the spindle on the hold-down bar.
- Hand grips are
covered with an oil and stain resistant red vinyl or red plastic
for easy identification and to assure the safety and comfort of
the operator.
- All die-stamped steel parts
are deburred, cleaned, and receive a zinc plated finish that resists
corrosion and creates a smooth, easy to clean surface.
- Heavy duty rivets are used
to maintain accuracy and to increase endurance. All heavy-duty clamps
receive hardened ground pins and bushings.
- Flanged washers are supplied
with all U-bar and open bar models. Weld-on bolt retainers are supplied
with all solid bar models.
- Toggle mechanism designed to
allow maximum clearance for ease of loading and unloading work piece.
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VERTICAL
HANDLE
(Hold Down Action)
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HORIZONTAL HANDLE
(Hole Down Action)
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