Environmental Engineering Reference
In-Depth Information
FIgure 25.24
A.welder.performing.arc.welding.
All. woodworking. machinery—such. as. table. saws,. swing. saws,. radial. saws,.
band.saws,.jointers,.tenoning.machines,.boring.and.mortising.machines,.shapers,.
planers,. lathes,. sanders,. veneer. cutters,. and. other. miscellaneous. woodworking.
machinery—shall. be. enclosed. or. guarded,. except. that. part. of. the. blade. doing. the.
actual.cutting,.to.protect.the.operator.and.other.employees.from.hazards.inherent.to.
the.operation.
Power.control.devices.must.be.provided.on.each.machine.to.make.it.possible.for.
the.operator.to.cut.off.the.power.to.the.machine.without.leaving.his.or.her.position.
at. the. point-of-operation.. Power. controls. and. operating. controls. should. be. located.
within.easy.reach.of.the.operator.while.at.his.or.her.regular.work.location,.making.it.
unnecessary.for.the.operator.to.reach.over.the.cutter.to.make.adjustments..This.does.
not.apply.to.constant.pressure.controls.used.only.for.setup.purposes.
Restarting. machinery. in. operations. where. injury. to. the. operator. might. result.
because. motors. were. to. restart. after. power. failures,. provision. must. be. made. to.
prevent.machines.from.automatically.restarting.upon.restoration.of.power.
Band.saw.blades.must.be.enclosed.and.guarded.except.for.the.working.portion.of.
the.blade.between.the.bottom.of.the.guide.rolls.and.the.table..Band.saw.wheels.must.
be.fully.encased..The.outside.periphery.of.the.enclosure.must.be.solid..The.front.and.
back.should.be.either.solid.or.wire.mesh.or.perforated.metal.
Circular. table. saws. should. have. a. hood. over. the. portion. of. the. saw. above. the.
table.mounted.so.that.the.hood.will.automatically.adjust.itself.to.the.thickness.of,.
and.remain.in.contact.with,.the.material.being.cut..Circular.table.saws.should.have.a.
spreader.aligned.with.the.blade,.spaced.no.more.than. 1 / 2 .inch.behind.the.largest.blade.
mounted.in.the.saw..A.spreader.in.connection.with.grooving,.dadoing,.or.rabbeting.
is.not.required..Circular.table.saws.used.for.ripping.must.have.non-kickback.ingers.
or.dogs.
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