(A) Scope.
This rule applies to mechanical power transmission apparatus
and facilities to transmit power to operating equipment or machine tools. This
rule shall
does not be construed as
being applicable
apply to power
transmission facilities located within the frame or the equipment and exposure
is necessary to its operation or adjustment.
(B) Reserved.
(C) Belts and pulleys.
This paragraph covers all types and shapes of
power-transmission belts, except the following when operating at two hundred
fifty feet per minute or less: flat belts one inch or less in width, flat belts
two inches or less in width which are free from metal lacings or fasteners,
round belts one-half inch or less in diameter; and single strand V-belts, the
width of which is thirteen thirty-seconds inch or less.
(1) Horizontal belts (not including conveyors
or conveyor belts).
Horizontal belts and pulleys seven feet or less above floor or
platform shall
will be guarded as follows:
(a) Where both runs of horizontal belts are
seven feet or less from floor level, the guard
shall
will extend to
at least fifteen inches above the belt or to a standard height, except that
where both runs of a horizontal belt are forty-two inches or less from the
floor, the belt
shall
will be fully enclosed in accordance with rule
4123:1-5-99 of the
Administrative Code. Note: In power or power development plants a standard
guard railing may be used in lieu of this
requirement
specification.
(b) If lower part of belt is seven feet or
less above platform or floor level and upper part of belt more than seven feet
above platform or floor level, the lower part of belt and pulley
shall
will be
guarded on bottom, sides, and ends, to a height of seven feet above floor or
platform level. Guarding
shall
will be in accordance with rule
4123:1-5-99 of the
Administrative Code.
(c) Horizontal
overhead belts more than seven feet above floor or platform
shall
will be
guarded for their entire length under the following conditions:
(i) If located over passageways or work
places and traveling eighteen hundred feet or more per minute;
(ii) If center to center distance between
pulleys is ten feet or more;
(iii)
If belt is eight inches or more in width.
(d) Where passageway is provided between
upper and lower parts of belts, the passageway
shall
will be guarded
on sides, top and bottom.
(2) Vertical and inclined belts (not
including conveyors or conveyor belts).
Vertical and inclined belts and their pulleys seven feet or
less above floor or platform level shall
will be guarded in accordance with rule
4123:1-5-99 of the
Administrative Code.
(3) Vee
belts.
Vee belts and their pulleys, where exposed to contact,
shall
will be
guarded.
(4) Rope drives.
Rope drives and their pulleys, where exposed to contact,
shall
will be
guarded.
(D) Gears,
sprockets, link belts, and friction drives.
(1) Set or train of gears.
(a) A set or train of gears is two or more
power-driven gears that move and intermesh. This does not apply to adjusting
gears which do not normally revolve and are not power operated, or to adjusting
gears which require access to the gears for manual manipulation.
(b) Guarding.
All or any part of a set or train of gears seven feet or less
above floor or platform level shall
will be completely guarded or have a band guard
around the face of the gear with the side flanges extending inward beyond the
root of the teeth. Where there are openings of more than two and one-half
inches between arm or through web, the entire gear shall
will be
guarded. Guarding shall
will be in accordance with rule
4123:1-5-99 of the
Administrative Code and shall
will be securely fastened in
place.
(2)
Frictional disc, link belt, and sprocket drives.
Frictional disc, link belt, and sprocket drives
shall
will be
guarded.
(E)
Shafts, collars couplings, and flywheels.
(1)
Guarding of horizontal shafting.
(a) All
exposed parts of horizontal shafting seven feet or less from floor or working
platform, excepting runways used exclusively for oiling or running adjustments,
shall
will be
protected by a stationary casing enclosing shafting completely or by a trough
enclosing sides and top or sides and bottom of shafting as location
requires.
(b) Shafting under bench
machines
shall
will be enclosed by a stationary casing, or by a
trough at sides and top or sides and bottom as location requires. The sides of
the trough shall come within at least six inches of the underside of table, or
if shafting is located near the floor, within six inches of the floor. In every
case the sides of the trough shall extend at least two inches beyond the
shafting or protuberance.
(2) Guarding vertical and inclined shafting.
Vertical and inclined shafting seven feet or less from floor or
work platform, excepting maintenance runways, shall
will be guarded
in accordance with rule
4123:1-5-99 of the
Administrative Code.
(3)
Projecting shaft ends.
(a) Projecting shaft
ends
shall
will present a smooth edge and end and
shall not
cannot project more than one-half the diameter of the
shaft unless guarded by nonrotating caps or safety sleeves.
(b) Unused keyways
shall
will be filled
up or covered.
(4) Set
screws, keys, and other projections.
Set screws, keys, and other projections, protruding beyond the
surface of revolving parts shall
will be guarded.
(5) Collars and couplings.
(a) Collars.
All revolving collars, including split collars,
shall
will be
cylindrical, and screws or bolts used in collars shall not
cannot
project beyond the largest periphery of the collar.
(b) Couplings.
Shaft couplings shall
will be so constructed as to present no hazard
from bolts, nuts, setscrews will, however, be permitted where they are covered
with safety sleeves or where they are used parallel with the shafting and are
countersunk or else do not extend beyond the flange of the coupling.
(6) Universal joints.
Universal joints shall
will be guarded.
(7) Revolving face plates and chucks.
Revolving face plates and chucks shall
will be
cylindrical with no projecting parts on the rim unless such projecting parts
are guarded. This does not apply to those face plates and chucks revolving less
than five revolutions per minute.
(8) Flywheels.
Flywheels located so that any part is seven feet or less above
floor or platform shall
will be guarded in accordance with the
requirements
specifications of paragraphs (E)(8)(a) to
(E)(8)(d)(i)(c) of this rule:
(a) With
an enclosure of sheet, perforated, or expanded metal, or woven wire;
(b) With standard guard railings placed not
less than fifteen inches nor more than twenty inches from rim. When flywheel
extend into a pit or is within twelve inches of the floor, a standard toeboard
shall
will
also be provided.
(c) When the
upper rim of a flywheel protrudes through a working floor, it
shall
will be
entirely enclosed or surrounded by a standard guard railing and
toeboard.
(d) Alternate methods.
(i) For flywheels with smooth rims five feet
or less in diameter, where the preceding methods cannot be applied, the
following may be used:
(a) A disc attached to
the flywheel in such manner as to cover the spokes of the wheel on the exposed
side and present a smooth surface and edge, at the same time providing means
for periodic inspection;
(b) An
open space, not exceeding four inches in width, may be left between the outside
edge of the disc and the rim of the wheel if desired, to facilitate turning the
wheel over;
(c) Where a disc is
used, the keys or other dangerous projections not covered by disc
shall
will be
cut off or covered.
(ii)
Paragraph (E)(8) of this rule does not apply to flywheels with solid web
centers.
Notes
Ohio Admin. Code 4123:1-5-04
Effective:
6/30/2023
Five Year Review (FYR) Dates:
2/1/2027
Promulgated Under:
119.03
Statutory Authority: 4121.12, 4121.121, 4121.13
Rule Amplifies: 4121.47
Prior Effective Dates:
04/01/1964, 08/01/1977, 04/01/1999, 04/10/2011,
02/01/2022
