Machine Guarding

The words on each slide as the author wrote them, read from the file by software so they can be searched. Layout, pictures and tables are not shown here: the slides above and the download are the original.

1. Slide 1

   Machines, Machine Guarding & Preventing Amputations

   • Susan Harwood Training Grants
   • #SH-31233-SH7
2. Slide 2

   The Disclaimer

   • Including information from Georgia Tech Research Institute Machine Guarding Presentation
   • Thanks to Georgia Tech Research Institute for information compiled from their Machine Guarding PowerPoint (shortened version presented here).
   • This material was produced under grant number SH-31233-SH7 from the Occuptional Safety and Health Administration, U.S. Department of Labor. It does not necessariy reflect the views or policies of the U.S. Department of Labor, nor does mention of trade names, commercial products, or organizations imply endorsement by the U.S. Government.
3. Slide 3

   Machine Guarding & Preventing Amputations

4. Slide 4

   Warnings and signs

5. Slide 5

   Amputations and Injuries

   • Crushed hands and arms, severed fingers and limbs, lacerations and abrasions - the list of possible machinery-related injuries is long and horrifying. Many hazards are created by moving machine parts.
6. Slide 6

   Amputations and Injuries(2)

   • Unguarded machines are common. Workers suffer approximately 18,000 amputations, lacerations, crushing injuries, abrasions, and over 800 deaths per year.
   • Amputations in meatpacking: “The line is so fast there is no time to sharpen the knife. The knife gets dull and you have to cut harder. That’s when you cut yourself.”
   • Nebraska meatpacking worker, Human Rights Watch
7. Slide 7

   Why are machines not guarded?

   • “No one would stick their arm, hand, finger, head, etc. in there.”
   • “No one is supposed to be back there, in there, around it while it is running.”
   • “The machine came that way; it never had a guard.”
   • “I’ve been doing it this way for twenty years without any problems.”
8. Slide 8

   Why are machines not guarded? (cont.)

   • “The guard is in the way.”
   • “The OSHA inspector didn’t say anything about it.”
   • “We’ll put it back on if OSHA comes.”
9. Slide 9

   Amputations: Beware…

   • shears
   • saws
   • slicers
   • slitters
   • power presses
   • (the 4 s’s and a P)
10. Slide 10

    Machine Guarding Requirements

    • Machine guarding must:
    • Prevent contact
    • Be secure
    • Protect worker from falling objects
    • Create no new hazards
11. Slide 11

    Machine Hazards: Hazardous Motions

12. Slide 12

    Machine Hazards: Hazardous Actions

    • Cutting
    • Shearing
    • Bending
    • Punching
13. Slide 13

    Methods of machine safeguarding

    • Physical guards
    • Devices
    • Location/Distance
14. Slide 14

    Fixed Guard

    • Provides a barrier - a permanent part of the machine, preferable to all other types of guards.
15. Slide 15

    Other types of guards

    • Interlocked: When opened or removed, power automatically shuts off or disengages
    • Adjustable: Useful because flexible for different sizes or operations, but subject to human error
    • Self-adjusting: Moves according to size of stock (avoids human error)
    • Interlocked guard on revolving drum
    • Bandsaw blade adjustable guard
    • Circular table saw self-adjusting guard
16. Slide 16

    Safeguarding by Location/Distance

    • Locate the machine or dangerous moving parts so that they do not present a hazard to a worker during normal operation.
    • Maintain a safe distance from the danger area.
17. Slide 17

    Guarded????

18. Slide 18

    Requirements for Machines 1910.212

    • One or more methods of machine guarding shall be provided to protect the operator and other employees in the machine area from hazards…
19. Slide 19

    1910.212(a)(5)

    • Fan blades less than 7 feet above the floor shall be guarded (openings no larger than 1/2 inch)
20. Slide 20

    Fan with an ungarded pulley less than 7 feet above the floor

21. Slide 21

    A completely unguarded fan blade and pulley

22. Slide 22

    Belts, pulleys, flywheels,

    • etc.
    • All belts, pulleys, gears, shafts, and moving parts shall be guarded 1910.213(a)(9)
    • Flywheels 7 feet or less above the floor shall be guarded 1910.219(b)(1)
    • Flywheels above working areas: guards must have strength to hold the weight
23. Slide 23

    Dangers of unguarded machinery

24. Slide 24

    saHari ripped from the scalp

25. Slide 25

    Pulleys

    • Pulleys 7 feet or less above the floor or platform must be guarded. 1910.219(d)
    • Pulleys with cracks or pieces broken out of rims shall not be used.
26. Slide 27

    Machine Guarding website

27. Slide 28

    Lockout Tagout

    • Video: Control of Hazardous Energy
    • Show a machine guarding lockout/tagout video of your choice