Machine Guarding

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Machine Guarding
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Objectives

• Identify basic machinery terms
• Identify common machines found within a campus
• Identify hazards that occur in or on machinery
• Select the appropriate OSHA Standard that applies
  to the hazard

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Basic Machinery Terms

• Drilling and Boring
• Grinding
• Milling
• Turning

• Punching and Forging
• Planing and Shaping
• Turning
• Sawing

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Requirements for Safeguards(29 CFR 1910.213)

• Prevent contact
• Protect from falling objects
• Create no new hazards
• Create no interference
• Allow safe lubrication
• Secure

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General Machine Requirements(29 CFR 1910.212)

• The point of operation that exposes an employee
  to injury shall be guarded
• Machines designed for a fixed location shall be
  securely anchored to prevent walking or moving
• Special hand tools for placing and removing
  material shall be such as to permit easy handling
  of material without the operator placing a hand
  in the danger zone
• Fan blades less than seven (7) feet above the
  floor or working level, the blades shall be
  guarded and have openings no larger than one-half
  (1/2) inch

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Training

• A description identification of the hazards
  associated with particular machines
• The safeguards themselves, how the provide
  protection and the hazards for which they are
  intended
• How to use the safeguards and why
• How and under what circumstances safeguards can
  be removed and by whom
• What to do if a safeguard is damaged, missing or
  unable to provide adequate protection

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Woodworking Machinery(29 CFR 1910.213)

• All belts, pulleys, gears, shafts and moving
  parts shall be guarded
• A mechanical or electrical power control shall be
  provided on each machine to make it possible for
  the operator to cut off the power from each
  machine without leaving their position at the
  point of operation

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Woodworking Machinery

• Belt sanding machines shall be provided with
  guards at each nip point where the sanding belt
  runs on to the pulley
• Lathes used for turning long pieces of wood stock
  held between the two centers shall be equipped
  with long curved guards extending over the tops
  of the lathes in order to prevent the work pieces
  from being thrown out of the machine if they
  should become loose

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Abrasive Wheel Machinery (29 CFR 1910.215)

• The safety guard shall cover the spindle end,
  nut, and flange projections
• Work rests shall be used to support the work.
  They shall be of rigid construction designed to
  be adjustable to compensate for wheel wear with
  the maximum opening of 1/8 inch to prevent the
  work from being jammed between the wheel and the
  rest, which may cause wheel breakage

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Abrasive Wheel Machinery

• The adjustable tongue or the end of the
  peripheral member at the top shall never exceed
  1/4 inch
• All wheels shall be closely inspected and sounded
  by the user ( ring test) to make sure they have
  not been damaged . The spindle speed of the
  machine shall be checked before mounting of the
  wheel to be certain that it does not exceed the
  maximum operating speed marked on the wheel.

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