proprietary and confidential machine safeguarding supervisor leadership training series "our...

Proprietary and Confidential

MACHINE SAFEGUARDING

Supervisor Leadership Training Series

"Our loss control service is advisory only. We assume no responsibility for management or control of customer safety activities nor for implementation of recommended corrective measures. This presentation is based on information supplied by the customer and/or observations of conditions and practices at the time of the consultation. We have not tried to

identify all hazards. We do not warrant that requirements of any federal, state, or local law, regulation or ordinance have or have not been met. ”

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Do’s

• Actively participate by contributing– Ask questions

– Share experiences

– Request explanations

• Be supportive of your co-workers

• Apply what you learn to your job

• Pass on the information

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Objectives

• Discuss how to:

• Identify & prioritize risk

• Maintain/improve production without creating hazards

• Identify & correct hazards

• Reduce potential liability

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Basics of Machine Safeguarding

• Assess existing and residual risk– Use R3, ANSI B11 TR3 or similar method

• Safeguard based on:– Frequency (F) of exposure (anticipated & real)

– Likelihood (L) & Severity (S) of potential injury

• Evaluate machines and equipment – Safeguard any part, function or process which may cause

injury/illness to operator(s) or others in the vicinity

• Use engineering, training/educational, and motivation controls

• Inspect safeguards routinely– Properly installed, used & functional

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Machine Guarding General Requirements – 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 such as those created by:

– Point of operation

– Ingoing nip points

– Rotating parts

– Flying chips

– Sparks

• Guards shall be affixed to the machine where possible and secured elsewhere if for any reason attachment to the machine is not possible. The guard shall be such that it does not offer an accident hazard in itself.

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Hazardous Mechanical Motions and Actions

Motions

• Rotating

– Including in-running nip points

• Reciprocating

• Transverse

Actions

• Cutting

• Punching

• Shearing

• Bending

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Rotating Part Nip Points

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Rotating Part Nip Points (Cont.)

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Rotating Part Projections

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Rotating Machine Components

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Reciprocating Action

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Transverse Motion

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Cutting Motions

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Punching, Shearing & Bending

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Where Mechanical Hazards Occur

Dangerous moving parts in these three basic areas need safeguarding:

– Point of Operation

– Power Transmission Apparatus

– Other moving parts

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Requirements For All Machines

• Safeguarding Provisions (Guards & Devices)

• Controls (Types, Location, Labeling)

• Disconnects – Refer to National Electric Code® (Not required for plug & cord equipment)

• Starters (Magnetic/Anti-Restart)

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Requirements - Power Transmission Covers

• Up to 7’ from floor or work platform

– Except for specific belts

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Belt Guarding Exclusions OSHA 1910.219

• Power transmission belts operating at 250 feet per minute of less and that are:– Flat belts 1 in. or less in width

– Flat belts 2 in. or less in width, which are free from metal lacings or fasteners

– Round belts ½ in. or less in diameter

– Single strand V-belts, the width of 13/32/in. or less

• Vertical and inclined belts, if not more than 2 1/2 in. wide and running at a speed of less than 1000 feet per minute and is free from metal lacings or fastenings – May be guarded with a nip-point belt ad pulley guard

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Requirements - Anchoring

• Fixed equipment

– Designed for securing

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Requirements – Control Reliability

• Use of two or more identical (or dissimilar) components, modules, devices or systems verifying (monitoring) the proper operation of each, to ensure the performance of the safety functions

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Requirements for Safeguards

• Prevent contact between the worker and the point of operation

• Securely fastened and require tools to remove

• Prevent objects from falling into moving parts

• Create no new hazards

• Create no interference that hinders worker’s task

• Allow for safe lubrication/maintenance

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Machine Safeguarding Methods - Guards

• Fixed

• Interlocked

• Adjustable

• Self-adjusting

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Fixed Guard

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Interlocks

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Adjustable Guard

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Self-Adjusting Guard

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Machine Safeguarding Methods - Devices

• Presence Sensing

– Photoelectrical (optical)

– Radio Frequency (capacitance)

– Electromechanical

• Pullbacks

• Restraints

• Safety Controls

– Two-Hand Trip

– Two-Hand Control

• Safety Mats

• Gates

– Types A & B

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Presence Sensing

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Pullbacks

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Restraints

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Two Hand Trip

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Two Hand Control

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Safety Mats

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Safety Gates (Type A & B)

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Machine Safeguarding Methods –Feeding/Ejection

• Feeding and ejection methods to improve safety for the operator– Automatic feed

– Semi-automatic feed

– Automatic ejection

– Semi-automatic ejection

– Robots

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Machine Safeguarding Methods – Location/Distance

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Robots

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Machine Safeguarding Methods – Miscellaneous Aids

• Awareness barriers

• Miscellaneous protective shields

• Hand-feeding tools and holding fixtures

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Awareness Barriers

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Shields

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Hand Tools

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Summary

• Evaluate machines and equipment

• Assess existing and residual risk

• Safeguard based on:– Frequency (F), Likelihood (L) & Severity (S)

• Use engineering, training/educational, and motivation controls

• Inspect machines, equipment and safeguards routinely

proprietary and confidential machine safeguarding supervisor leadership training series "our...

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