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

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19

10

. Machine Guards - General

Eye & Body Flushing Facilities

Point of Operation

Open-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