Machine GuardingMODULE 192 2006 TEEXWhat hazards exist?Crushed by or drawn into equipmentStruck by moving partsStruck by failed components or particles3 2006 TEEXKey parts of machines1. Point of operation: where work is performed on the material, such as cutting, shaping, boring, or forming of stock. 2. Power Transmission Device: transmits energy to the part of the machine performing the workIncludes flywheels, pulleys, belts, connecting rods, couplings, cams, spindles, chains, cranks, and gears. 4 2006 TEEXKey parts of machines3. Operation Contros: Control mechanisms4. Ot!er movin" parts: can include reciprocating, rotating, and transverse moving parts, feed mechanisms, and auxiliary parts of the machine# 2006 TEEXHazards to be Guardedhings to guard includeIn!running nip points"otating equipment#lying chips or sparks$elts or gears%arts that impact or shear6 2006 TEEXRotating PartsCan grip hair or clothing Can force the body into a dangerous position%ro&ecting pieces increase risk$ 2006 TEEXIn-Running ip Points$etween ' rotating parts$etween rotating and tangential parts$etween rotating and fixed parts which shear, crush, or abrade% 2006 TEEXReciprocating Parts"isk of being struck between stationary and moving part& 2006 TEEX!rans"erse motionContinuous straight line motion(orker struck or caught in pinch or shear point10 2006 TEEX#utting action)irect in&ury from cutting action#lying chips or sparksSaws, drills, lathes, mills11 2006 TEEXPunching action"am stamps materials)anger at point of operation 12 2006 TEEX$hearing action%owered blade that shears materials*a+ard at point of operation 13 2006 TEEX%ending action%ower applied to a slide to stamp,shape materials*a+ard at point of operation14 2006 TEEXGuarding Princip&esPrevent contact between ha+ardous moving parts and body or clothing'ec(re "(ar): not easily removedProtect from o*+ects falling into machinery,o new !a-ar)s: sharp,rough edges,o interference with &ob,comfort,speed.ow safe (*rication: without removing guards if possible1# 2006 TEEXGuarding Methods-ocation , distance.uards#ixedInterlocked/d&ustableSelf!ad&usting16 2006 TEEXGuarding Methods)evices%resence sensing%ullback"estraintSafety controls 0tripwire cable, two!hand control, etc.1.ates1$ 2006 TEEXGuarding Methods#eeding 2 e&ection methods/utomatic and,or semi!automatic feed and e&ection"obots3iscellaneous aids/wareness barriers%rotective shields*and!feeding tools1% 2006 TEEX'ixed Guard$arrier is a permanent part of machine%referable over other types1& 2006 TEEXInter&oc(ed GuardStops motion when guard is opened or removedInterlocked guard on revolving drum20 2006 TEEX)d*ustab&e Guard$arrier may be ad&usted for variable operations(hat are the drawbacks4$andsaw blade ad&ustable guard21 2006 TEEX$e&f-)d*usting Guard/d&usts according to si+e,position of materialCircular table saw self!ad&usting guard22 2006 TEEXPu&&bac( +e"iceCables attached to operator5s hands or wrists"emoves hands from point of operation during danger period(hat are the drawbacks423 2006 TEEXRestraint +e"iceCables attached to fixed point and wrists or hands/d&ustable to let hands travel in predetermined area3ay be accompanied by hand!feeding tools24 2006 TEEX$afety !rip,ire #ab&e)evice located around the perimeter of or near the danger area6perator must be able to reach the cable to stop the machine2# 2006 TEEX!,o-Hand #ontro&"equires constant pressure on both pads to activate the machine*ands on controls at safe distance while machine is in dangerous cycle26 2006 TEEXGate3ust close fully to protect user before cycle will start .ate 6pen .ate Closed2$ 2006 TEEX$afeguarding by -ocation.+istance-ocation of ha+ardous parts that is inaccessible or not a ha+ard during normal operation3ust maintain safe distanceraining, warning, communication necessary2% 2006 TEEXProtecti"e $hie&ds%rotection from flying particles or splashing fluids)o not protectcompletely frommachine ha+ards2& 2006 TEEXWhat regu&ations app&y?'7 C#" 8789 Subpart 6'7 C#" 8789 Subpart % for hand and portable power tools/%I "% :; .(oodworking machinery requirements'8:./brasive wheel machinery'8. %oint of operation guarding:ii. .uarded if exposes employee to in&ury/ccording to standards orAeep any part of body out of danger +oneiii. *and tools to permit material handling B in addition to guards, not insteadiv. @xamples of machines requiring guards on point of operation3# 2006 TEEX121345156a7 Machine guarding;. "evolving barrels, drums, containers guarded by interlocked enclosure 0cannot turn without guard in place1:. @xposure to fan blades: guard openings 8,' inch36 2006 TEEX121345156b7 )nchoring fixed machinery3achines designed for fixed location must be anchored to prevent movingT!is pe)esta "rin)er is )esi"ne) for anc!orin"0 *(t is not anc!ore)

)brasi"e Whee& Machinery29 CFR 1910.2153% 2006 TEEX121345186a7 Genera& re0uirements/brasive wheels must be guarded, with exceptions.uard design dependent on type of work and type of wheel3& 2006 TEEX121345186a7 Genera& re0uirements(ork rests: "igid, clamped in place securely/d&usted to within 8,= inch of wheelCever ad&usted while in motion1or2 rest is cose/a)+(ste)40 2006 TEEX121345186b7627 9xposure ad*ustment#or type where operator stands in front of opening: /d&ustable for decreasing wheel si+e/d&ustable tongue guard must never be more than D inch from wheel41 2006 TEEX121345186d7 MountingInspect for damage and ring test immediately before mountingap with light nonmetallic implement 0screwdriver, wooden mallet1If sound is dead, cracked ring may not be usedCheck spindle speed against maximum for wheel42 2006 TEEXRing !est

Mechanica& Po,er-!ransmission )pparatus29 CFR 1910.21944 2006 TEEX/rganization of 121345120a1 .eneral requirements0b1 %rime!mover guards081 #lywheels0'1 Cranks and connecting rods0>1 ail rods or extension piston rods0c1 Shafting0d1 %ulleys4# 2006 TEEX/rganization of 121345120e1 $elt, rope, and chain drives0f1 .ears, sprockets, and chains0g1 .uarding friction drives0h1 Aeys, setscrews, and other pro&ections0i1 Collars and couplings0&1 $earings and facilities for oiling0k1 .uarding of clutches, cutoff couplings, and clutch pulleys46 2006 TEEX/rganization of 121345120l1 $elt shifters, clutches, shippers, poles, perches, and fasteners0m1 Standard guards!general requirements0o1 /pproved materials0p1 Care of equipment

Hazards on /i& and Gas $itesMachine Guardin4% 2006 TEEXParts Re0uiring Guarding)rive belts and shafts B mud pumps and tank area%ony rods"otating partsShale shaker/gitator shafts 2 couplings3oving generator parts0explore14& 2006 TEEXMud Pumps#0 2006 TEEX$ha&e $ha(er#1 2006 TEEXGenerators#2 2006 TEEXParts Re0uiring Guarding/ir compressorsCrown sheavesAelly bushing B or controls"otary chain drive/ir hoist line)rawworks$ench grinder wheels#3 2006 TEEX#ro,n $hea"es#4 2006 TEEXKe&&y and %ushing/lternative /batement: S) 8!8'.'= C*!8 ## 2006 TEEX+ra,,or(s#6 2006 TEEXParts Re0uiring Guarding$elts, drive chains, gears and drives on power and hand toolsraveling blocksSheavesCathead4#$ 2006 TEEX+ri&&ing -ine#% 2006 TEEX!ra"e&ing %&oc(#& 2006 TEEXHoisting -ine

$afety Responsibi&itiesMachine Guardin61 2006 TEEX$afety Responsibi&ities3ana"ement: @nsure all machinery is properly guarded'(pervisors:rain employees on specific guard rules in their areas@nsure machine guards remain in place and are functionalImmediately correct machine guard deficienciesEmpo/ees:)o not remove guards unless machine is locked and tagged"eport machine guard problems to supervisors immediately)o not operate equipment unless guards are in place62 2006 TEEX!raining6perators,affected employees should receive training on:*a+ards associated with particular machines*ow the safeguards provide protection and the ha+ards for which they are intended*ow and why to use the safeguards *ow and when safeguards can be removed and by whom (hat to do if a safeguard is damaged, missing, or unable to provide adequate protection

Hand and Portab&e Po,er !oo&s29 CFR 1910 Su!"ar# P and 192$ Su!"ar# %64 2006 TEEX#onstruction "s4 Genera& IndustryConstruction, alteration, or repair4/pplicable standard depends on type of operations:8789 Subpart %: *and and %ortable %owered ools and 6ther *and!*eld @quipment87'< Subpart I: ools B *and and %ower6# 2006 TEEX121345:5 Genera&@mployer is responsible for safe condition of tools and equipmentIncluding equipment furnished by employeeCompressed air must not be used for cleaning unless:"educed to E>9 p.s.i.6nly with effective chip guarding and %%@66 2006 TEEX121345:;6a7 Portab&e po,ered too&s%ortable circular saws F' in. guarded/utomatic return to covering positionSwitches and controls: constant pressure control for circular and chain sawsother controls for other tools as appropriate6$ 2006 TEEX121345:;6a7 Portab&e po,ered too&s%ortable belt sanding machine guardingCip pointsGnused run of sanding beltCracked saws: remove from service.rounding: 3eet Subpart S6% 2006 TEEX121345:;6b7 Pneumatic po,ered too&s and hoseool retainer to prevent e&ection/irhose designed for applied pressure and service6& 2006 TEEX121345:; Guarding of portab&e po,ered too&sc. %ortable abrasive wheels: 3ust be guarded"ing test and inspectiond. @xplosive actuated fastening toolse. %ower lawnmowers.uardingControls and shutoff device-abeling, manuals)esign$0 2006 TEEX121345:: /ther portab&e too&s and e0uipmenta. Hacks-oading and marking6peration and maintenanceb. /brasive blast cleaning no++les: operating valve and support$1 2006 TEEX125