Louisiana Administrative Code › Title 28 - EDUCATION › Part CXXXIII - Bulletin 1674 - Safety Manual for Career and Technical Education Programs › Chapter 25 - Mechanical Hazards Worksheet › Subchapter B - Hazard Identification › Section CXXXIII-2517 - Abrasive Wheel Machinery

Current through Register Vol. 50, No. 6, June 20, 2024
A.
				  General Requirements
Circle the Appropriate Answer
1. Do grinding wheels fit freely on the spindle?
Y N N/A
2. Is forcing the grinding wheel on the spindle
								prohibited?
Y N N/A
3. Are all wheels closely inspected and sounded by
								the user (ring test) to make sure they have not been damaged before being
								mounted?
Note: Before mounting the wheel, make
								sure the spindle speed of the machine does not exceed the maximum operating
								speed marked on the wheel.
Y N N/A
4. Is the spindle nut-tightened only enough to
								hold the wheel in place?
Y N N/A
5. Are all grinding wheel operators required to
								use eye protection?
Y N N/A
6. Are all contact surfaces of the wheel,
								blotters, and flanges flat and free of foreign material?
Y N N/A
7. When a bushing is used in the wheel hole, is it
								positioned so it does not exceed the width of the wheel nor make contact with
								the flange?
Y N N/A
B.
				  Floor and Bench-Grinding Machines
Circle the Appropriate Answer
1. Are all floor- and bench-mounted abrasive
								wheels equipped with safety guards?
Y N N/A
2. Does the safety guard cover the spindle end,
								nut, and flange projections?
Y N N/A
3. Is the maximum angular exposure of the grinding
								wheel and side 90o or less?
Exception. When work requires contact with the
								wheel below the horizontal plane of the spindle, the angular exposure shall not
								exceed 125o. In either case, the exposure shall
								begin at not more than 65o above the horizontal
								place of the spindle.
Y N N/A
4. Are work rests provided which are rigidly
								supported and readily adjustable?
Y N N/A
5. Are work rests kept adjusted closely to the
								wheel with a maximum opening of 1/8 inch to prevent the work from being jammed
								between the wheel and the rest?
Y N N/A
C.
				  Portable and Other Abrasive Wheels
Circle the Appropriate Answer
1. Do all machines with abrasive wheels greater
								than 2 inches in diameter have safety guards?
Note: Some abrasive wheels may be
								equipped with flanges.
Y N N/A
2. Is the maximum exposure angle on all grinding
								wheels 180o or less?
Y N N/A
3. When in use, is the guard on right angle head
								or vertical portable grinders located between the operator and the wheel?
Y N N/A
4. Is the guard on right angle head or vertical
								portable grinders adjusted so that pieces of a broken wheel will be deflected
								away from the operator?
Y N N/A
5. Is the top half of the wheel on other grinders
								always enclosed?
Y N N/A
D.
				  General Requirements for Guards
Circle the Appropriate Answer
1. Are the guard and its fastenings strong enough
								to retain fragments of the wheel in case of breakage?
Y N N/A
2. Are guards mounted to maintain proper alignment
								with the wheel?
Y N N/A
3. Are tongue guards at the top of the wheel
								bench, floor stand, and cylindrical grinders adjusted to the decreasing
								diameter of the wheel so that the gap is never more than one-fourth of an inch?
Y N N/A
E.
				  Ping Test
1. Wheels should be tapped gently
				  with a light nonmetallic implement, such as the handle of a screwdriver for
				  light wheels, or a wooden mallet for heavier wheels. Tap wheels about
				  45o each side of the vertical centerline and about 1
				  or 2 inches from the edge of the wheel. Then rotate the wheel
				  45o and repeat the test. A sound and undamaged wheel
				  will give a clear metallic tone. If cracked, there will be a dead sound and not
				  a clear "ring."