| Anti-Repeat |
Part of the control system designed to limit the
press to a single stroke after operator initiation. |
| Anti-Tie Down |
Part of the control system designed to limit the press to
a single stroke if the actuating device is held in the actuating
position. |
| Bolster |
Plate(s) attached to the bed of the press having
a means for attaching die components. |
| Bottom Dead Center |
The reference position in the stroke where the
slide is at its lowest possible position. Also referred to as
180° when using the rotation of the crankshaft as the basis
for slide location. |
| Brake |
The mechanism in the drive train of a mechanical
press used to stop motion of the ram and crankshaft. |
| Clutch |
The mechanism used on a mechanical press to selectively
couple the flywheel to the drive train. |
| Full Revolution Clutch |
Type of clutch that, when actuated, cannot be
disengaged until the press slide has completed a single stroke. |
| Part Revolution Clutch |
Type of clutch that can be engaged or disengaged
at any point in the stroke. |
| Con Rod |
The connecting member that conveys motion and
force from the crankshaft or eccentric to the slide. Also called
the connecting rod or pitman. |
| Continuous Stroking |
Uninterrupted, multiple strokes of the press without
disengaging and engaging clutch between strokes. |
| Operator Maintained Continuous Stroking |
The press strokes continuously as long as the
operator maintains actuation of the operator control. |
| Continuous on Demand |
Once the operator's initial start, the press continues
to stroke with the clutch disengaging after each stroke. The
clutch reengages by a signal provided by a feed mechanism or
other auxiliary equipment. |
| Two-Hand Trip Device |
An actuating means requiring concurrent use of
both hands of the operator to trip the press. |
| Employer |
Any individual, partnership, corporation, or other
form of enterprise, which uses presses, contracts, hires, or
is responsible for the personnel associated with power press
operations. |
| Flywheel |
A massive rotating wheel on a shaft. The flywheel
receives and stores energy from the drive motor, and then provides
energy to perform work during the press stroke. |
| Hands In Die Operation |
A press production system where the operator places
his hands within the safeguarded point of operation at any time
for parts placement, positioning, or removal. |
| Hands Out of Die Operation |
A press production system where the operator does
not have to place his hands within the safeguarded point of
operation for parts placement, positioning, or removal. |
| Pinch Point |
Any point other than the point of operation at
which it is possible for a part of the body to be caught between
moving parts of the press or auxiliary equipment, or between
the material and between moving parts of the press or auxiliary
equipment. |
| Point of Operation |
The area of the die where material is actually
positioned and work is being performed. |
| Shut Height |
The distance from the top of the press bed to
the bottom of the slide face, with the stoke down and adjustment
up. |
| Slide |
The main reciprocating press member also called
a ram, plunger, or platen. |
| Tonnage Capacity |
The maximum load that the frame is designed to
safely sustain. |
| Tonnage Rating |
(work capacity) The tonnage force that the press
can exert a specified point from the bottom of the stroke. For
presses rated at 32 tons and less, industry standards measure
this rating at 1/32" off bottom dead center. |
| Top Dead Center |
The reference position in the stroke where the
slide is at its highest possible position. Also referred to
as 0° when using the rotation of the crankshaft as the basis
for slide location. |
