Precautions - Kurt DL640 Installation & Operation Manual

PRECAUTIONS

When using the DoubleLock Vise in production, remember the following
points:
• Never use this vise as a Self Centering Vise.
• See figure #3, page 14. Never clamp parts opposite from each other.
• Always clamp directly across from each other or use a spacer to even
clamping pressure points.
• Use the Handle provided or Torque Wrench with your vise. The rated
clamping forces are obtained with these handles. Never use an extension
or strike the handle with a hammer. This will cause damage to the thrust
bearings.
• When using parallels or Step Jaws, select a size that keeps the BOTTOM
of the clamped part at or below the top surface of the Movable Jaw.
Clamping above this surface could result in Jaw lift and loss of accuracy.
• Never use a hammer, blunt object, or "cheater bar" in assisting when
clamping parts in the vise. Damages to the Thrust Bearing assembly, and
seals may accrue.
• Always use the handle provided, handle equivalent, or torque wrench.
• Avoid using an impact wrench. Some impact wrenches cause internal
"shock" on moving components and increasing the wear significantly. If
an impact wrench is used, avoid rapid movement. Never use the impact
wrench to tighten the part. This increases the clamping forces above the
product capabilities and causes stress in areas not intended to except
stresses. A controllable torque impact wrench is acceptable only when
clamping forces needs to be consistence. Avoid over torquing.
• Clamp parts to the lowest position possible. Part nesting at the vise base
increases clamping forces and decreases the possibility of part distortion.
• Always clamp the part with the part at or near center of the vise width.
Clamping a part beyond center may cause inconsistent part clamping
pressures.
13