Enforcement Policy on Rollers and Idlers
The 30 CFR Guarding Standard:
30 CFR 56.14107
Moving machine parts.
(a) Moving machine parts shall
be guarded to protect persons from contacting gears,
sprockets, chains, drive, head, tail, and takeup pulleys,
flywheels, couplings, shafts, fan blades, and
similar moving parts that
can cause injury.
(b) Guards shall not be
required where the exposed moving parts are at least seven
feet away from walking or working surfaces.
The Nationally Published MSHA
Enforcement Policy VOL IV:
56/57.14107 Moving Machine Parts
All moving parts identified under this standard are to be guarded
with adequately constructed, installed and maintained guards to
provide the required protection. The use of chains to rail off
walkways and travelways near moving machine parts, with or without
the posting of warning signs in lieu of guards, is not in compliance
with this standard.
Conveyor belt rollers are not to be construed as
"similar exposed moving machine parts" under the standard and
cannot be cited for the absence of guards and violation of this
standard where skirt boards exist along the belt.
However, inspectors should recognize the accident potential, bring
the hazard to the attention of the mine operators, and recommend
appropriate safeguards to prevent injuries.
This standard is to be cited when a guard at conveyor locations does
not extend a distance sufficient to prevent any parts of a person
from accidentally getting behind the guard and becoming caught, or
in those instances when there is no guard at the conveyor-drive,
conveyor-head, conveyor-tail, or conveyor take-up pulleys.