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Machine Guarding 29 CFR 1910.211 to 1910.219

Machine Guarding 29 CFR 1910.211 to 1910.219. Rule of Thumb. Any machine part, function, or process that may cause injury must be safeguarded. Regulatory Requirements. Regulatory requirements found in 29 CFR 1910, Subpart O Applies to specific types of equipment

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Machine Guarding 29 CFR 1910.211 to 1910.219

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  1. Machine Guarding29 CFR 1910.211 to 1910.219

  2. Rule of Thumb • Any machine part, function, or process that may cause injury must be safeguarded.

  3. Regulatory Requirements • Regulatory requirements found in 29 CFR 1910, Subpart O • Applies to specific types of equipment • Delineates general requirements

  4. Where Mechanical Hazards Occur • The point of operation • In the power transmission apparatus • Other moving parts

  5. Hazardous Mechanical Motions • Rotating • Reciprocating • Transverse

  6. Hazardous Actions • Cutting • Punching • Shearing • Bending

  7. Types of Rotating Mechanisms • Collars • Couplings • Cams • Clutches • Flywheels • Shaft ends • Spindles

  8. Nip Points • Caused by rotating parts • Causes include • Parts rotating in opposite directions • Parts rotating tangentially • Parts rotating close to a fixed part

  9. Types of Reciprocating Motions • Back and forth • Up and down

  10. Types of Transverse Motions • Straight and in a continuous line • Examples include two pulleys and a belt

  11. Cutting Actions • Include • Rotating motions • Reciprocating motions • Transverse motions

  12. Types of Cutting Mechanisms • Band saws • Circular saws • Boring or drilling machines • Lathes • Milling machines

  13. Types of Punching Actions • A ram mechanism: • Blanks • Draws • Stamps • Used on metal or other materials

  14. Types of Punching Equipment • Power presses • Iron working equipment

  15. Types of Shearing Actions • Uses a powered slide or knife • Done to trim or shear metal or other materials

  16. Types of Shearing Equipment • Shears that are operated: • Hydraulically • Mechanically • Pneumatically

  17. Types of Bending Actions • Power is applied to a slide to: • Draw • Stamp • Used on metal or other materials

  18. Types of Bending Equipment • Power presses • Press brakes • Tubing benders

  19. Requirements for Safeguards • Minimum general requirements include: • Prevent contact • Secure • Protect from falling objects • Create no new hazards • Create no interference • Allow for safe lubrication

  20. Classifications of Safeguards • Guards • Devices • Location/distance • Feeding and ejection methods • Miscellaneous aids

  21. Types of Guards • Fixed • Interlocked • Adjustable • Self-adjusting

  22. Types of Devices • Presence Sensing • Photoelectrical • Radio frequency • Electromechanical • Pullbacks or Restraints

  23. Types of Devices (cont.) • Safety Controls • Safety trip control • Pressure-sensitive body bar • Safety tripod • Safety tripwire cable • Two-hand control • Two-hand trip • Gates • Interlocked • Other

  24. Location/Distance • Makes it virtually impossible to contact moving parts • Separates operators from the equipment • Limited by the available workspace

  25. Feeding and Ejection Methods • Automatic feed • Semiautomatic feed • Automatic ejection • Semiautomatic ejection • Robot

  26. Miscellaneous Aids • Awareness barriers • Protective shields • Hand-feeding tools and holding fixtures

  27. Quiz 1. Mechanical hazards occur at the point of operation, in the power transmission apparatus, and ____________. 2. Any moving part on a piece of equipment that could injure an employee should be guarded. True or False 3. Power presses are extremely dangerous because of the force necessary for them to operate. True or False 4. Shearing mechanisms can be operated with _____________, ___________, or ___________ energy. 5. As long as the guards remain in place, operators should not be trained on machine guarding. True or False

  28. Quiz (cont.) 6. A robot is one type of automated feeding and ejection mechanism. True or False 7. Hazardous mechanical motions include _____________, ____________, and _____________. 8. Nip points are created when sliding mechanisms move back and forth. True or False 9. Cutting mechanisms include ____________________, ____________________ and ____________________. 10. Location and distance is not a classification of machine safeguarding. True or False

  29. Quiz Answers 1. Mechanical hazards occur at the point of operation,in the power transmission apparatus, and in any other moving parts. 2. True. All moving parts that create a hazard should be guarded. 3. True. The force of a power press can destroy metal, let alone the human body. 4. Shearing mechanisms can be operated with hydraulic, mechanical, or pneumatic energy. 5. False. If operators work with equipment containing safeguards, they should be adequately trained on how to use them.

  30. Quiz Answers (cont.) 6. True. A robot is a type of feeding and/or ejection method. 7. Hazardous mechanical motions include rotating, reciprocating, and transverse. 8. False. Nip points are created by rotating parts. 9. Cutting mechanisms include band saws, circular saws, drilling machines, lathes, and milling machines. 10. False. Location and distance is one of five classifications of machine safeguarding.

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