DEPARTMENT OF LICENSING AND REGULATORY AFFAIRS  
DIRECTOR’S OFFICE  
GENERAL INDUSTRY SAFETY AND HEALTH STANDARD  
(By authority conferred on the director of the department of licensing and regulatory  
affairs by sections 16 and 21 of the Michigan occupational safety and health act, 1974 PA  
154, MCL 408.1016 and 408.1021, and Executive Reorganization Order Nos. 1996-2,  
2003-1, 2008-4, and 2011-4, MCL 445.2001, 445.2011, 445.2025, and 445.2030)  
PART 7. GUARDS FOR POWER TRANSMISSION  
R 408.10701 Scope.  
Rule 701. This part applies to all equipment used in the transmission of power,  
excluding the point of operation.  
History: 1979 AC.  
R 408.10702 Referenced standard.  
Rule 702. The Michigan Occupational Safety and Health Administration (MIOSHA)  
standard General Industry Safety and Health Standard Part 2. “Walking-Working  
Surfaces,” R 408.10201 to R 408.10241, is referenced in these rules. Up to 5 copies of  
this standard may be obtained at no charge from the Michigan Department of Licensing  
and Regulatory Affairs, MIOSHA Regulatory Services Section, 530 West Allegan Street,  
P.O. Box 30643, Lansing, Michigan, 48909-8143 or via the internet at the following  
website: www.michigan.gov/mioshastandards. For quantities greater than 5, the cost, at  
the time of adoption of these rules, is 4 cents per page.  
History: 2016 AACS; 2019 AACS.  
R 408.10703 Definitions; B to G.  
Rule 703. (1) "Belt" includes any power transmission belt, including, but not  
limited to, a flat belt, round belt, and V-belt, overhead chain and link belt. It does not  
include a conveyor belt.  
(2) "Belt pole" means a device used in shifting belts on and off fixed pulleys on a  
line or countershaft if there are no loose pulleys.  
(3) "Belt shifter" means a device for mechanically shifting belts from tight to  
loose idler pulleys or vice versa, or for shifting belts on cones of speed pulleys.  
(4) "Exposed to contact" means that the location of an object is such that a  
person might come into contact with it and be injured.  
Page 1  
(5) "Flywheel" includes a balance wheel and a flywheel pulley mounted and  
revolving on the crankshaft of an engine or other shafting.  
(6) "Gears" means a set or train of wheels or parts that engages another part as by  
meshing teeth.  
(7) "Guarded" or "enclosed" means that an object is covered, fenced,  
surrounded so that it is not exposed to contact.  
or  
History: 1979 AC; 1982 AACS.  
R 408.10704 Definitions; H to V.  
Rule 704. (1) "Horizontal belt" means a belt running within a 60 degree angle  
from horizontal.  
(2) "Maintenance runway" means a permanent runway or platform used for  
oiling, maintenance, running adjustment, or repair work, but not for a passageway.  
(3) "Nip-point belt and pulley guard" means a device which encloses a pulley  
and is provided with rounded or rolled edge slots through which the belt passes.  
(4) "Point of operation" means that point at which cutting, shaping, or forming by  
a machine is accomplished upon stock and other points that may offer a hazard to the  
operator in inserting or manipulating stock in the operation of the machine.  
(5) "Securely fastened" means that the safety device or object referred to shall be so  
secured in place that it cannot be moved under normal or reasonably foreseen  
conditions or circumstances.  
(6) "Vertical belt" means a belt running within a 30 degree angle from vertical.  
History: 1979 AC.  
POWER TRANSMISSION EQUIPMENT  
R 408.10711 Flywheels.  
Rule 711. An employer shall ensure that any part of a flywheel 7 feet or less above  
the floor or platform is guarded in 1 of the following ways:  
(a) Enclosed by a guard pursuant to R 408.10751 to R 408.10754.  
(b) With guardrail systems placed not less than 15, nor more than 20, inches from  
the rim of the flywheel in compliance with General Industry Safety and Health Standard  
Part 2. “Walking-Working Surfaces,” as referenced in R 408.10702.  
(c) The upper rim of a flywheel protruding through a working floor is enclosed or  
surrounded by a guardrail system in compliance with General Industry Safety and Health  
Standard Part 2. “Walking-Working Surfaces,” as referenced in R 408.10702.  
(d) A flywheel with a smooth rim 5 feet or less in diameter may be guarded pursuant  
to R 408.10756.  
History: 1979 AC; 1982 AACS; 2016 AACS; 2019 AACS.  
Page 2  
R 408.10712 Cranks and connecting rods.  
Rule 712. A crank and a connecting rod, if exposed to contact, must be guarded  
pursuant to R 408.10751 to R 408.10754 or by a guardrail system in compliance with  
General Industry Safety and Health Standard Part 2. “Walking-Working Surfaces,” as  
referenced in R 408.10702.  
History: 1979 AC; 1982 AACS; 2016 AACS; 2019 AACS.  
R 408.10713 Tail rods and extension piston rods.  
Rule 713. Tail rods and extension piston rods exposed to contact must be guarded  
pursuant to R 408.10751 to R 408.10754 or by a guardrail system in compliance with  
General Industry Safety and Health Standard Part 2. “Walking-Working Surfaces,” as  
referenced in R 408.10702, which allows a clearance of not less than 15, nor more than  
20, inches from the fully extended tail rod or extension piston rod.  
History: 1979 AC; 1982 AACS; 2016 AACS; 2019 AACS.  
R 408.10714 Rescinded.  
History: 1979 AC; 1982 AACS.  
R 408.10715 Discharge or exhaust pipes.  
Rule 715. The discharge of an exhaust pipe or boiler blowoff, if exposed to contact,  
shall be guarded pursuant to R 408.10751 to R 408.10754.  
History: 1979 AC; 1982 AACS.  
R 408.10716 Revolving and reciprocating parts.  
Rule 716. A revolving or reciprocating part, if exposed to contact, shall be  
guarded pursuant to R 408.10751 to R 408.10754.  
History: 1979 AC; 1982 AACS.  
R 408.10721 Shafts.  
Rule 721. (1) A continuous line of shafting shall be secured in position against  
endwise movement.  
(2) An inclined or vertical shaft will be held in position against endwise trust.  
(3) A project shaft end, if exposed to contact, shall be made flush or guarded  
pursuant to R 408.10751 to R 408.10754.  
History: 1979 AC; 1982 AACS.  
Page 3  
R 408.10722 Shafting.  
Rule 722. (1) Shafting exposed to contact 7 feet or less above a floor or platform  
level shall be guarded pursuant to R 408.10751 to R 408.10754.  
(2) Horizontal shafting extending over a driveway shall be guarded with a trough  
guard unless it is located 15 feet or more above the driveway or is a part of an overhead  
traveling crane.  
(3) Horizontal transmission shafting exposed to contact under benches shall be  
guarded in 1 of the following ways:  
(a) Be completely enclosed.  
(b) Be guarded by a trough guard. The sides of the trough shall come to the  
underside of the table or, if the shafting is located near a floor, to the floor.  
(c) Be guarded on exposed sides with a rigid shield guard extending from the  
underside of the bench top to 2 inches below the line of shafting.  
History: 1979 AC; 1982 AACS.  
R 408.10723 Rescinded.  
History: 1979 AC.  
R 408.10725 Pulley guards and guides.  
Rule 725. (1) A pulley and a pulley part exposed to contact 7 feet or less from  
the floor or platform shall be guarded pursuant to R 408.10751 to R 408.10754.  
(2) If the distance from a pulley to the nearest fixed pulley, clutch, or hanger is less  
than the width of the belt used, a guide shall be provided to prevent the belt from  
leaving the pulley.  
(3) If there is an overhanging pulley on a line, jack, or countershaft with no  
bearing between the pulley and the outer end of the shaft, a guide to prevent the belt from  
running off the pulley shall be provided.  
History: 1979 AC; 1982 AACS.  
R 408.10726 Pulley condition and operation.  
Rule 726. (1) A pulley with a defect, including, but not limited to, a crack or a  
piece broken out, shall not be used.  
(2) A pulley subject to active corrosive conditions shall be of corrosion-  
resisting material.  
(3) A pulley permanently out of service shall not be allowed to remain on shafting  
which is in use, unless enclosed with a guard pursuant to R 408.10751 to R  
408.10754.  
(4) A pulley shall not be operated at more than its designed rim speed.  
History: 1979 AC; 1982 AACS.  
Page 4  
R 408.10727 Belts.  
Rule 727. (1) A belt and pulley that is 7 feet or less above the floor or platform and  
that is exposed to contact must be guarded pursuant to R 408.10751 to R 408.10754. In a  
power plant or power-development room, a guardrail system may be used in compliance  
with General Industry Safety and Health Standard Part 2. “Walking-Working Surfaces,”  
as referenced in R 408.10702.  
(2) A horizontal belt more than 7 feet above the floor or platform must be guarded  
for its entire length if located over a passageway or work place pursuant to R 408.10753  
and figure 2 contained in subrule (5) of this rule.  
(3) A passageway between horizontal belts must have a lower run guarded by a  
platform that is provided with a guardrail system in compliance with General Industry  
Safety and Health Standard Part 2. “Walking-Working Surfaces,” as referenced in  
R 408.10702, and the upper run guarded pursuant to subrule (2) of this rule.  
(4) A vertical or inclined belt running over a lower pulley more than 7 feet above the  
floor or platform and located over a passageway or work place must be guarded pursuant  
to subrule (2) of this rule.  
(5) Figure 2 reads as follows:  
FIGURE 2  
Page 5