Section 3.22
Machine Guarding
Glossary

Belts:  All transmission belts, such as flat belts, round belts or V-belts.

Brake:  The mechanism used on a mechanical power press to stop and/or hold the crankshaft, either directly or through a gear train, when the clutch is disengaged.

Calender:  A machine equipped with two or more metal rolls revolving in opposite directions and used for continuously sheeting or plying up rubber and plastics compounds and for frictioning or coating materials with rubber and plastics compounds.

Clutch:  The coupling mechanism used on a mechanical power press to couple the flywheel to the crankshaft, either directly or through a gear train.

Device:  A press control or attachment that:

• Restrains the operator from inadvertently reaching into the point of operation;
• Prevents normal press operation if the operator's hands are inadvertently within the point of operation;
• Automatically withdraws the operator's hands if the operator's hands are inadvertently within the point of operation as the dies close; or
• Presents the initiation of a stroke, or stops of stroke in progress, when there is an intrusion through the sensing field by any part of the operator's body or by any other object.

Flywheels:  Flywheels include flywheels, balance wheels, and flywheel pulleys mounted and revolving on crankshaft of engine or other shafting.

Guard:  A barrier that prevents entry of the operator's hands or fingers into the point of operation.

Hand Feeding Tool:  Any hand held tool designed for placing or removing material or parts to be processed within or from the point of operation.

Mill:  A machine consisting of two adjacent metal rolls, set horizontally, which revolve in opposite directions (e.g., toward each other as viewed from above) used for the mechanical working of rubber and plastics compounds.

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 the moving parts of a press or auxiliary equipment, or between moving and stationary parts of a press or auxiliary equipment or between the material and moving part or parts of the press or auxiliary equipment.

Press:  A mechanically powered machine that shears, punches, forms or assembles metal or other material by means of cutting, shaping, or combination dies attached to slides.  A press consists of a stationary bed or anvil, and a slide (or slides) having a controlled reciprocating motion toward and away from the bed surface, the slide being guided in a definite path by the frame of the press.

Two-Hand Trip:  A clutch actuating means requiring the concurrent use of both hands of the operator to trip the press.

Sheaves:  Grooved pulleys

Section 3.22

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