Machine Guarding Safety Course

Machine GuardingMachine Guarding

The point of operation that exposes an employee toThe point of operation that exposes an employee to
injury shall be guardedinjury shall be guarded
Machines designed for a fixed location shall beMachines designed for a fixed location shall be
securely anchored to prevent walking or movingsecurely anchored to prevent walking or moving
Special handtools for placing and removing materialSpecial handtools for placing and removing material
shall be such as to permit easy handling of materialshall be such as to permit easy handling of material
without the operator placing a hand in the dangerwithout the operator placing a hand in the danger
zonezone
Fan blades less than seven (7) feet above the floor orFan blades less than seven (7) feet above the floor or
working level, the blades shall be guarded and haveworking level, the blades shall be guarded and have
openings no larger than one-half (1/2) inchopenings no larger than one-half (1/2) inch
General Machine RequirementsGeneral Machine Requirements
(29 CFR 1910.212)(29 CFR 1910.212)

Requirements for SafeguardsRequirements for Safeguards
(29 CFR 1910.213)(29 CFR 1910.213)
Prevent contactPrevent contact
Protect from falling objectsProtect from falling objects
Create no new hazardsCreate no new hazards
Create no interferenceCreate no interference
Allow safe lubricationAllow safe lubrication
SecureSecure

MachineryMachinery
(29 CFR 1910.213)(29 CFR 1910.213)
All belts, pulleys, gears, shafts andAll belts, pulleys, gears, shafts and
moving parts shall be guardedmoving parts shall be guarded
A mechanical or electrical power controlA mechanical or electrical power control
shall be provided on each machine toshall be provided on each machine to
make it possible for the operator to cutmake it possible for the operator to cut
off the power from each machineoff the power from each machine
without leaving their position at the pointwithout leaving their position at the point
of operationof operation

TrainingTraining
A description & identification of the hazardsA description & identification of the hazards
associated with particular machinesassociated with particular machines
The safeguards themselves, how the provideThe safeguards themselves, how the provide
protection and the hazards for which they areprotection and the hazards for which they are
intendedintended
How to use the safeguards and whyHow to use the safeguards and why
How and under what circumstances safeguards canHow and under what circumstances safeguards can
be removed and by whombe removed and by whom
What to do if a safeguard is damaged, missing orWhat to do if a safeguard is damaged, missing or
unable to provide adequate protectionunable to provide adequate protection

Abrasive Wheel MachineryAbrasive Wheel Machinery
(29 CFR 1910.215)(29 CFR 1910.215)
The safety guard shall cover the spindle end,The safety guard shall cover the spindle end,
nut, and flange projectionsnut, and flange projections
Work rests shall be used to support the work.Work rests shall be used to support the work.
They shall be of rigid construction & designedThey shall be of rigid construction & designed
to be adjustable to compensate for wheelto be adjustable to compensate for wheel
wear with the maximum opening of 1/8 inch towear with the maximum opening of 1/8 inch to
prevent the work from being jammed betweenprevent the work from being jammed between
the wheel and the rest, which may causethe wheel and the rest, which may cause
wheel breakagewheel breakage

The adjustable tongue or the end of theThe adjustable tongue or the end of the
peripheral member at the top shall neverperipheral member at the top shall never
exceed 1/4 inchexceed 1/4 inch
All wheels shall be closely inspected andAll wheels shall be closely inspected and
sounded by the user ( ring test) to make suresounded by the user ( ring test) to make sure
they have not been damaged . The spindlethey have not been damaged . The spindle
speed of the machine shall be checkedspeed of the machine shall be checked
before mounting of the wheel to be certainbefore mounting of the wheel to be certain
that it does not exceed the maximumthat it does not exceed the maximum
operating speed marked on the wheel.operating speed marked on the wheel.
Abrasive Wheel MachineryAbrasive Wheel Machinery

Four Types of GuardsFour Types of Guards
1.1. FixedFixed
2.2. InterlockedInterlocked
3.3. AdjustableAdjustable
4.4. Self-AdjustingSelf-Adjusting

CITATIONSCITATIONS
No guard on grinders.No guard on grinders.
Wrong speed or unknown speed onWrong speed or unknown speed on
grinding wheelgrinding wheel

Major PointsMajor Points
Mechanical hazards can be found at the point ofMechanical hazards can be found at the point of
operation, the power transmission apparatusoperation, the power transmission apparatus
or at the area of transverse motion.or at the area of transverse motion.
Mortar mixer must have guarding over the openMortar mixer must have guarding over the open
face. Many manufacturer sell retrofit guards.face. Many manufacturer sell retrofit guards.

FatalitiesFatalities
Many fatalities have resulted fromMany fatalities have resulted from
employees getting caught inemployees getting caught in
rotating shafts such as well boringrotating shafts such as well boring
drills & lathes.drills & lathes.

Fixed GuardsFixed Guards
• A permanent part of the machineA permanent part of the machine
• Not dependent on any other part toNot dependent on any other part to
perform the functionperform the function
• Usually made of sheet metal, screen,Usually made of sheet metal, screen,
bars or other material which willbars or other material which will
withstand the anticipated impactwithstand the anticipated impact
• Generally considered the preferred typeGenerally considered the preferred type
of guard.of guard.
• Simple and durableSimple and durable

Interlocked GuardInterlocked Guard
• Usually connected to a mechanism thatUsually connected to a mechanism that
will cut off the power automaticallywill cut off the power automatically
• Could use electrical, mechanical orCould use electrical, mechanical or
hydraulic systemshydraulic systems
• Should rely on a manual reset systemShould rely on a manual reset system

Adjustable GuardAdjustable Guard
• Very flexible to accommodate variousVery flexible to accommodate various
types of stock.types of stock.
• Manually adjustedManually adjusted

Self-AdjustingSelf-Adjusting
• The opening is determined by theThe opening is determined by the
movement of the stock through themovement of the stock through the
guard.guard.
• Does not always provide maximumDoes not always provide maximum
protection.protection.
• Common complaint- reduced visibility atCommon complaint- reduced visibility at
the point of operation.... “I can’t see whatthe point of operation.... “I can’t see what
I’m doing!”I’m doing!”

Subpart O - Machinery & MachineSubpart O - Machinery & Machine
Guarding (1910.211 - 222)Guarding (1910.211 - 222)
Standard:1910.
212(a)(1)
Machine guards - General
1,726
215(b)(9)
Grinders - Tongue guards
1,491
219(d)(1)
Pulleys
1,285
212(a)(3)(ii)
Point of operation
1,100
215(a)(4)
Grinders - Work rests
1,027
Number of Serious Violations - FY 94

This picture, takenThis picture, taken
through a window,through a window,
shows anshows an
unguarded sawunguarded saw
blade.blade.

Once inside theOnce inside the
building, we findbuilding, we find
more violations. Anmore violations. An
ungrounded plug, anungrounded plug, an
electrical cord withelectrical cord with
an illegal splice.an illegal splice.
Don’t let theseDon’t let these
violations sneak upviolations sneak up
on you!on you!

This shows a pulleyThis shows a pulley
system which hassystem which has
correct guards tocorrect guards to
keep fingers andkeep fingers and
tools away fromtools away from
pinch points.pinch points.

This man lost hisThis man lost his
finger when afinger when a
machine in amachine in a
foundry cut it off.foundry cut it off.
There was no guardThere was no guard
in place, as requiredin place, as required
by law, to keep hisby law, to keep his
finger out of a pointfinger out of a point
of contact.of contact.

This grinder has aThis grinder has a
fixed guard on thefixed guard on the
side to keep fingersside to keep fingers
away from theaway from the
moving grind stonemoving grind stone

This is an example ofThis is an example of
a self-adjustinga self-adjusting
guard thatguard that
automatically movesautomatically moves
to accommodateto accommodate
different size stock.different size stock.
Note the unguardedNote the unguarded
pulley underneath.pulley underneath.

This is an example ofThis is an example of
an adjustable guard.an adjustable guard.
The operator mustThe operator must
move the guard tomove the guard to
accommodateaccommodate
different size stockdifferent size stock
on this band saw.on this band saw.

TransmissionTransmission
sources such as thissources such as this
should be guardedshould be guarded
to keep hands andto keep hands and
arms out of them.arms out of them.

This machine isThis machine is
using a gate systemusing a gate system
to keep hands out ofto keep hands out of
the point ofthe point of
operation area.operation area.

Bench GrindersBench Grinders
require a workrequire a work
rest with arest with a
maximummaximum
clearance of 1/8clearance of 1/8
inch to insureinch to insure
that the workthat the work
does not getdoes not get
drawn into thedrawn into the
grinding wheel.grinding wheel.

The top clearanceThe top clearance
on a bench grinderon a bench grinder
should not exceedshould not exceed
1/4 inch.1/4 inch.

This wood workingThis wood working
device has andevice has an
adjustable guardadjustable guard
that moves as thethat moves as the
wood is fed into it.wood is fed into it.

When workingWhen working
closely with woodclosely with wood
cutting machines, acutting machines, a
push stick can keeppush stick can keep
your fingers on theyour fingers on the
end of your hands!!end of your hands!!

This saw has:This saw has:
• a blade guarda blade guard
• anti kickback deviceanti kickback device
It should have aIt should have a
retracting device toretracting device to
automatically bringautomatically bring
the saw back intothe saw back into
positionposition

This worker isThis worker is
protected from theprotected from the
moving blade by anmoving blade by an
adjustable guard.adjustable guard.

Moving wheels areMoving wheels are
guarded with coverguarded with cover
plates.plates.
Adjustable guard onAdjustable guard on
the blade at thethe blade at the
point of operation.point of operation.

A shield of safetyA shield of safety
glass preventsglass prevents
sparks and particlessparks and particles
from striking thefrom striking the
worker.worker.
Rotating shafts areRotating shafts are
required to haverequired to have
guards on them.guards on them.

This machine isThis machine is
using a wire guardusing a wire guard
to stop the machineto stop the machine
when a worker getswhen a worker gets
too close.too close.

Instead of havingInstead of having
the worker pick thethe worker pick the
finished product outfinished product out
of the die with theirof the die with their
fingers, this systemfingers, this system
uses an automaticuses an automatic
device to push thedevice to push the
product out of theproduct out of the
die.die.

This machineThis machine
ejects theejects the
finished productfinished product
automatically.automatically.

In order to operateIn order to operate
this press thethis press the
operator must pushoperator must push
both buttons at theboth buttons at the
top of the machine.top of the machine.
This insures that hisThis insures that his
hands are not in thehands are not in the
point of operationpoint of operation
area when the pressarea when the press
activates.activates.

The operator mustThe operator must
press both of thepress both of the
control buttons atcontrol buttons at
the same time tothe same time to
operate this press.operate this press.

This operate hasThis operate has
wrist cuffs attachedwrist cuffs attached
to her arms to keepto her arms to keep
her from puttingher from putting
them in harms way.them in harms way.
Some versions willSome versions will
automatically pullautomatically pull
the operators handsthe operators hands
back when the pressback when the press
cycles.cycles.

This cable will stopThis cable will stop
the machine when itthe machine when it
is pulled.is pulled.

The tripod type barThe tripod type bar
on top of thison top of this
machine can bemachine can be
grabbed by a workergrabbed by a worker
to stop the machine.to stop the machine.

This safety bar willThis safety bar will
stop the machine ifstop the machine if
the worker gets toothe worker gets too
close to theclose to the
operation area.operation area.

Robots can beRobots can be
deadly.deadly.
Establish a systemEstablish a system
to keep humansto keep humans
from getting into thefrom getting into the
robots work area.robots work area.
MaintenanceMaintenance
workers must use aworkers must use a
lockout system.lockout system.

It’s up to youIt’s up to you
Of all thing’s in life that you have noOf all thing’s in life that you have no
control over, this is one thing that youcontrol over, this is one thing that you
have complete control over.have complete control over.
Keep the guarding in place!Keep the guarding in place!
Be Safe!!!Be Safe!!!

Machine Guarding Safety Course

More Related Content

What's hot

Viewers also liked

Similar to Machine Guarding Safety Course

Recently uploaded

Machine Guarding Safety Course