Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › General Industry and Construction Safety and Occupational Health Standards › General Industry Safety Standards › Part 1 - General Provisions › Section R. 408.10034 - Machine guards and devices

Current through Vol. 24-12, July 15, 2024
Rule 34.
(1) Two
					 hand-control devices shall be the anti-tie down type and located in a manner to
					 prevent bridging. Operation shall require manual activation of both controls
					 until a point is reached in the cycle where the operator cannot remove his or
					 her hands and place them within a pinch point. If repeating would cause an
					 injury, an anti-repeat device shall be incorporated into the control
					 system.
(2) Guards shall be secured
					 to the machine, if possible, or to other fixed objects. The guard shall not
					 create a hazard in itself.
(3) A
					 point of operation guard or device shall be as prescribed in a specific
					 standard, or, in the absence of a specific standard, shall be designed and
					 constructed, when required, to prevent the machine operator exposed to the
					 hazard from having any part of his or her body in the hazardous area during the
					 operating cycle. A guard or device for the point of operation of a
					 nonproduction arbor press or straightening press is not required if the machine
					 is equipped with a hand control that is designed to stop the ram action or
					 return the ram to the up position when released .
(4) Hand tools shall not be substituted for
					 the required guarding or point of operation devices, except that a hand tool
					 may be used as prescribed in subrule (5) of this rule for a press brake
					 operation. Where hand tools are used for placing into, and removing material
					 from, a point of operation, they shall be designed so that the operator is not
					 required to place a hand within the point of operation.
(5) A bending operation on a press brake
					 involving less than 25 pieces of 1 specific bend, if not guarded, shall require
					 the use of a hand tool when the operator must hold the work piece within 4
					 inches of the point of operation, and a conspicuous sign shall be posted on the
					 machine stating "Hand tools shall be used to hold stock."
(6) A revolving barrel, container, or drum
					 exposed to contact shall be guarded by a standard barrier, an enclosure, or
					 equivalent protection where a hazard exists. Access through a standard barrier
					 or enclosure shall be by a gate equipped with an interlock, which shall
					 disconnect the power when the gate is opened and require manual re-actuation of
					 a start button. A constant pressure jog control that bypasses the interlock may
					 be used to aid loading and unloading.
(7) Blades of a fan, located within 7 feet of
					 a floor or working level and used for ventilation or cooling of an employee,
					 shall be guarded with a firmly affixed or secured guard. Any opening in the
					 guard shall have not more than 1 of its dimensions more than 1 inch and the
					 distance to the blade shall not be less than that prescribed in Table
					 1.
(8) A fan used in process
					 cooling whose blade is less than 7 feet above the floor or working level shall
					 meet the distance requirements of Table 2. Where the openings are larger than
					 those shown in Table 2, the distance from the guard to the blade shall prevent
					 any part of the employee's body from making contact with the blade.
(9) When an employee is exposed to a hazard
					 created by a pinch point other than point of operation, the hazard shall be
					 guarded or the employee otherwise protected.
(10) A band or circular saw shall be guarded
					 as prescribed in General Industry Safety and Health Standard Part 27
					 "Woodworking Machinery," as referenced in R 408.10002.
(11) An extractor, parts washer, or tumbler,
					 manually controlled and equipped with an inside revolving cylinder, shall be
					 equipped with a cover or door interlocked in such a manner as to prevent
					 opening the door when the inside cylinder is in motion, and to prevent power
					 operation of the inside cylinder when the cover or door is open. An inch
					 control or constant pressure control which bypasses the interlock may be used
					 to aid loading and unloading.
(12)
					 An employee shall not place his or her body beneath equipment, such as
					 vehicles, machines, or materials, supported only by a jack, overhead hoist,
					 chain fall, or any other temporary single supporting means, unless safety
					 stands, blocks or other support system capable of supporting the total imposed
					 weight is used to protect the employee in case of failure of the supporting
					 system.
TABLE 1
Smallest dimension in guard (inches):
Minimum distance from guard to blade:
Greater than 0 up to 1/4 inclusive
1/2 inch
Greater than 1/4 up to 3/8 inclusive
11/2 inches
Greater than 3/8 up to 1/2 inclusive
2 1/2 inches
Greater than 1/2 up to 3/4 inclusive
4 inches
Greater than 3/4 up to 1 inclusive
6 times the smallest dimension
TABLE 2
Distance of opening from point of operation
									 hazard (inches)
Maximum width opening (inches)
1/2 to 1 1/2
1/4
1 1/2 to 2 1/2
3/8
2 1/2 to 3 1/2
1/2
3 1/2 to 5 1/2
5/8
5 1/2 to 6 1/2
3/4
6 1/2 to 7 1/2
7/8
7 1/2 to 12 1/2
1 1/4
12 1/2 to 15 1/2
1 1/2
15 1/2 to 17 1/2
1 7/8
17 1/2 to 31 1/2
2 1/8