Machinery Guarding
Why are we here today?• Training objectives
– Explain the general requirements for guarding the hazardous of machines
– Explain safety devices for machinery– Describe precautions to be taken around any
machinery used while on the job or at home
Number of Serious Violations – FY 2007 3
Most Frequently Cited Serious Violations in General Industry
FY 2007
212(a)(1) - O
1200(e)(1) - Z
23(c)(1) - D
212(a)(3)(ii) - O
1200(h)(1) - Z
215(b)(9) - O
147(c)(4)(i) - J
151(c) - K
147(c)(1) - J
305(b)(1) - S
1435
1266
743
704
682
648
615
614
613
555
Stan
dard
& S
ubpa
rt:
1910
. Machine Guards - General
Eye & Body Flushing Facilities
Point of OperationOpen-Sided Floors
Conductors Entering Cabinets/Boxes/Fittings Protected from Abrasion
Lockout/Tagout - Program
Grinders-Tongue GuardsHazard Communication – Information & Training
Lockout/Tagout - Procedures
Hazard Communication – Written Program
General Requirements
General requirements for machine guards
• Guards shall be attached to machine
• Secured elsewhere if not able to attach to machine
• Shall not cause a accident hazard in itself
• It shall not create a pinch point
Types of Guarding
• Guarding shall be provided to protect the operator from hazards created by:– Point of operation– Ingoing nip points– Rotating parts– Flying chips and sparks
Types of Guarding• Examples of guarding methods are:
– Barrier guards– Electronic safety devices– Two-hand tripping devices
• These are recommended but if is left up to the employer for the best guard for that machine
Table O-10 [In inches]___________________________________________________ | Distance of opening from point | Maximum width of of operation hazard | opening____________________________ |__________________ |
1/2 to 1 1/2 ................. | 1/41 1/2 to 2 1/2 ............... | 3/82 1/2 to 3 1/2 ............... | 1/23 1/2 to 5 1/2 ............... | 5/85 1/2 to 6 1/2 ............... | 3/46 1/2 to 7 1/2 ............... | 7/87 1/2 to 12 1/2 .............. | 1 1/412 1/2 to 15 1/2 ............. | 1 1/215 1/2 to 17 1/2 ............. | 1 7/817 1/2 to 31 1/2 ............. | 2 1/8
____________________________ |__________________
Point of Operation Guarding• Point of operation is the area where work
is actually being performed.
• Point of operation of machines that expose danger shall be guarded
• Hand tools shall be provided to protect a person from placing hands in danger zone
What’s wrong with this picture?
Safety Devices
• Some machines may take more than one means of guarding.
• It shall be that one or more methods be used in protecting the operator.
• Safety devices are used when guards can not be located in the area of the machine.
Safeguarding the point of operation
• Point of operation safety devices :
– Safety trip wired cables
– Gate or movable barrier
– Presence sensing point
– Two handed controls
CPL National Emphasis Program on Amputations
• Identify and reduce workplace hazards likely to cause amputations
• Top five machines that cause amputations are: – Saws, – Shears, – Slicers, – Slitters, and – Presses.
General Discussion on Machinery at work or at home
• Employer responsibility
• Employees responsibility
• Working at home
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