63229CFRCh.XVII(7–1–11Edition)§1910.217tocomeincontactwiththerollbiteorbecaughtbetweenarollandanadja-centobject,then,providedsuchele-mentsaremadeafixedpartofacal-ender,safetycontroldeviceslistedinparagraph(c)ofthissectionshallnotapply.(e)Tripandemergencyswitches.Alltripandemergencyswitchesshallnotbeoftheautomaticallyresettingtype,butshallrequiremanualresetting.(f)Stoppinglimits—(1)Determinationofdistanceoftravel.Allmeasurementsonmillsandcalendersshallbetakenwiththerollsrunningemptyatmaximumoperatingspeed.Stoppingdistancesshallbeexpressedininchesofsurfacetraveloftherollfromtheinstanttheemergencystoppingdeviceisactuated.(2)Stoppinglimitsformills.Allmillsirrespectiveofthesizeoftherollsortheirarrangement(individuallyorgroup-driven)shallbestoppedwithinadistance,asmeasuredininchesofsur-facetravel,notgreaterthan11⁄2per-centoftheperipheralno-loadsurfacespeedsoftherespectiverollsasdeter-minedinfeetperminute.(3)Stoppinglimitsforcalenders.(i)Allcalenders,irrespectiveofsizeoftherollsortheirconfiguration,shallbestoppedwithinadistance,asmeasuredininchesofsurfacetravel,notgreaterthan13⁄4percentoftheperipheralno-loadsurfacespeedsoftherespectivecalenderrollsasdeterminedinfeetperminute.(ii)Wherespeedsabove250feetperminuteasmeasuredonthesurfaceofthedriverollareused,stoppingdis-tancesofmorethan13⁄4percentarepermissible.Suchstoppingdistancesshallbesubjecttoengineeringdeter-mination.[39FR23502,June27,1974,asamendedat49FR5323,Feb.10,1984;61FR9240,Mar.7,1996]§1910.217Mechanicalpowerpresses.(a)Generalrequirements.(1)–(3)[Re-served](4)Reconstructionandmodification.Itshallbetheresponsibilityofanyper-sonreconstructing,ormodifyingame-chanicalpowerpresstodosoinaccord-ancewithparagraph(b)ofthissection.(5)Excludedmachines.Pressbrakes,hydraulicandpneumaticpowerpress-es,bulldozers,hotbendingandhotmetalpresses,forgingpressesandham-mers,rivetingmachinesandsimilartypesoffastenerapplicatorsareex-cludedfromtherequirementsofthissection.(b)Mechanicalpowerpressguardingandconstruction,general—(1)Hazardstopersonnelassociatedwithbrokenorfall-ingmachinecomponents.Machinecom-ponentsshallbedesigned,secured,orcoveredtominimizehazardscausedbybreakage,orlooseningandfallingorreleaseofmechanicalenergy(i.e.bro-kensprings).(2)Brakes.Frictionbrakesprovidedforstoppingorholdingaslidemove-mentshallbeinherentlyself-engagingbyrequiringpowerorforcefromanex-ternalsourcetocausedisengagement.Brakecapacityshallbesufficienttostopthemotionoftheslidequicklyandcapableofholdingtheslideanditsattachmentsatanypointinitstravel.(3)Machinesusingfullrevolutionposi-tiveclutches.(i)Machinesusingfullrevolutionclutchesshallincorporateasingle-strokemechanism.(ii)Ifthesingle-strokemechanismisdependentuponspringaction,thespring(s)shallbeofthecompressiontype,operatingonarodorguidedwithinaholeortube,anddesignedtopreventinterleavingofthespringcoilsineventofbreakage.(4)Footpedals(treadle).(i)Thepedalmechanismshallbeprotectedtopre-ventunintendedoperationfromfallingormovingobjectsorbyaccidentalsteppingontothepedal.(ii)Apadwithanonslipcontactareashallbefirmlyattachedtothepedal.(iii)Thepedalreturnspring(s)shallbeofthecompressiontype,operatingonarodorguidedwithinaholeortube,ordesignedtopreventinter-leavingofspringcoilsineventofbreakage.(iv)Ifpedalcounterweightsarepro-vided,thepathofthetraveloftheweightshallbeenclosed.(5)Handoperatedlevers.(i)Hand-lever...
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