07. machinery hazards

8/3/2019 07. Machinery Hazards

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Prepared byAMIR BIN MOHAMED; CIAST, P.O.Box 7012, Jalan Petani 19/1, Section 19, Shah Alam, Selangor


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Contact or entanglementContact or entanglement machinery.machinery.

Trapped between.Trapped between.

Contact or entanglementContact or entanglement material.material.

Struck by ejected parts of machinery.Struck by ejected parts of machinery.

Struck by material.Struck by material.

Release of potential energy.Release of potential energy.


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Contact of the operatorContact of the operatorwith sharp surfaces.with sharp surfaces.

SawsSaws

CuttersCutters

DiscsDiscs

BladesBlades


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ShearShear remove or take off by cutting.remove or take off by cutting.

Shear pointShear point position between stationary andposition between stationary and

moving part.moving part.

Shear betweenShear betweentwo machinerytwo machinery

parts.parts.


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Shear between machinery part andShear between machinery part andwork piece.work piece.


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Penetration of body by machinery or flyingPenetration of body by machinery or flyingobject.object.

Fly

ing objectFlying object ejection of machinery parts &ejection of machinery parts &

ejection of material.ejection of material.


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Moving part of machinery, eg; drill.Moving part of machinery, eg; drill.


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ImpactImpact object acts againts the body but doesobject acts againts the body but doesnot penetrate it. Struck by moving part.not penetrate it. Struck by moving part.

ExampleExample robot and traversing motion ofrobot and traversing motion of

machinery part.machinery part.


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EntanglementEntanglement resulting from hair, rings itemresulting from hair, rings item

of clothing in moving (particularly rotating) partof clothing in moving (particularly rotating) part

of machinery.of machinery.

Contact with single rotation surface.Contact with single rotation surface.


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Catching on projections and gaps.Catching on projections and gaps.


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Drawing in hazards between counterDrawing in hazards between counter--

rotating parts (nips).rotating parts (nips).


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Catching between rotating & fixed parts.Catching between rotating & fixed parts.


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Catching in material in motion.Catching in material in motion.


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Burns or removal of skin layer.Burns or removal of skin layer. High speed parts eg; centrifuge basket.High speed parts eg; centrifuge basket.

Abrasive materials eg; sander, abrasive wheel.Abrasive materials eg; sander, abrasive wheel.

Friction & abrasion hazards.Friction & abrasion hazards.


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CrushingCrushing body part caught between twobody part caught between twohard objects.hard objects.

Machinery part and a fixed structure.Machinery part and a fixed structure.


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Two machinery parts.Two machinery parts.


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Drawing inDrawing in body trapped between closing orbody trapped between closing orpassing motionspassing motions

of the machine.of the machine.

In running nipsIn running nips two countertwo counter

rotation parts,rotation parts,

rotating surfacerotating surface

and material.and material.


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Failure of the machine or seizing of machineFailure of the machine or seizing of machine

component. Resultcomponent. Result ejection of material.ejection of material.

ExamplesExamples -- disintegration of abrasive wheel.disintegration of abrasive wheel.

-- seizure of brake.seizure of brake.

-- failure of clamp.failure of clamp.


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Unexpected release of potential energy.

Unexpected release of potential energy. Examples:Examples:

-- energy store in springs.energy store in springs.

-- release of pressure.release of pressure.

-- falling objects.falling objects.


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EXERCISE

List the different types of machinery hazards at the abrasive

wheel shown below


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07. machinery hazards

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