Machine Motion and Guarding Quiz

This is the link to the osha topic on machine guarding motions and actions:

https://www.osha.gov/etools/machine-guarding/introduction/hazardous-motions-actions

Type yes if you can access the link

Even smooth, slowly rotating shafts can grip hair and clothing, and through minor contact force the hand and arm into a dangerous position. Injuries due to contact with rotating parts can be severe. Collars, couplings, cams, clutches, flywheels, shaft ends, spindles, meshing gears, and horizontal or vertical shafting are some examples of common rotating mechanisms which may be hazardous. The danger increases when projections such as set screws, bolts, nicks, abrasions, and projecting keys or set screws are exposed on rotating parts.

• Rotating

• Transversing

• Reciprocating

• In-running nip point

hazards are caused by the rotating parts on machinery. There are three main types of in-running nips. Parts can rotate in opposite directions while their axes are parallel to each other. These parts may be in contact (producing a nip point) or in close proximity. In the latter case, stock fed between two rolls produces a nip point. As seen here, this danger is common on machines with intermeshing gears, rolling mills, and calenders.

• Rotating

• Transversing

• Reciprocating

• In-running nip point

Hazardous because, during the back-and-forth or up-and-down motion, a worker may be struck by or caught between a moving and a stationary part.

• Rotating

• Transversing

• Reciprocating

• In-running nip point

(movement in a straight, continuous line) creates a hazard because a worker may be struck or caught in a pinch or shear point by the moving part.

• Rotating

• Transversing

• Reciprocating

• In-running nip point

The danger is at the point of operation where finger, arm and body injuries can occur & flying chips or scrap material can strike the head, particularly in the area of the eyes or face when cutting.

Examples of mechanisms involving cutting hazards include bandsaws, circular saws, boring and drilling machines, turning machines (lathes), or milling machines.

• Shearing

• Cutting

• Punching

• Bending

results when power is applied to a slide (ram) for the purpose of blanking, drawing, or stamping metal or other materials. The danger of this type of action occurs at the point of operation where stock is inserted, held, and withdrawn by hand. Typical machines used for punching operations are power presses and iron workers.

• Shearing

• Cutting

• Punching

• Bending

involves applying power to a slide or knife in order to trim or shear metal or other materials. A hazard occurs at the point of operation where stock is actually inserted, held, and withdrawn. Examples of machines used for shearing operations are mechanically, hydraulically, or pneumatically powered shears.

• Shearing

• Cutting

• Punching

• Bending

results when power is applied to a slide in order to draw or stamp metal or other materials. A hazard occurs at the point of operation where stock is inserted, held, and withdrawn. Equipment that uses bending action includes power presses, press brakes, and tubing benders.

• Shearing

• Cutting

• Punching

• Bending

A wide variety of mechanical motions and actions may present hazards to the worker. Categorize the basic types of hazardous mechanical motions and actions

Groups:

(a) Motions

,

(b) Actions

• Rotating

• Reciprocating

• Cutting

• In-Running Nip Points

• Punching

• Bending

• Transversing

• Shearing