Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › General Industry and Construction Safety and Occupational Health Standards › General Industry Safety Standards › Part 1a - ABRASIVE WHEELS › OPERATING PROVISIONS › Section R. 408.10199 - Tables

Current through Vol. 24-12, July 15, 2024
Rule 199. Tables 1 to 31 read as follows:
TABLES 1 TO 31
TABLE 1 GUARD EXPOSURE
									 ANGLE
Grinder Type
Exposure Above or Below Horizontal
									 Plane
Total Exposure
Bench and Floor
65 degrees above
*90 degrees
Cylindrical Grinder
65 degrees above
180 degrees
Surface Grinder
15 degrees below
150 degrees
Cut-off Machine
15 degrees below
150 degrees
Swing Frame
180 degrees
Snagging
180 degrees
Top
30 degrees above
60 degrees
Portable
180 degrees
Masonry and Concrete Saws
35 degrees above
180 degrees
Tool and Cutter Grinder
180 degrees
*Whenever the nature of the work
									 requires contact with the abrasive wheel below the horizontal plane of the
									 spindle, the exposure shall not exceed 125 degrees.
TABLE 2
GUIDE FOR
									 CONSTRUCTION OF DRAWN STEEL GUARDS FOR WHEEL
2" THICK AND LESS, 8"
									 AND LESS IN DIAMETER
*Material Used in Construction
									 of Guard Hot Rolled Steel SAE
1008 Min. Tensile
Strength 60,000 PSI for
speeds up to (SFPM)
Maximum
Thickness
									 of
Wheel,
Inches
2 to 5 inches
Above 5 to 8 inches
A Inches
B Inches
A Inches
B Inches
9,500
2
1/16
1/16
3/32
1/16
12,500
2
3/32
1/16
3/32
3/32
17,000
1
3/32
1/16
1/8
3/32
*The recommendations listed in the
									 above table are guides for the conditions stated. Other material, designs or
									 dimensions affording equal or superior protection are also acceptable.
TABLE 3
DRAWN
									 STEEL GUARD FOR PORTABLE GRINDERS
USED WITH DEPRESSED CENTER
									 WHEELS
Material Used in Construction
									 of Guard
Thickness of Wheel
Wheel
Diameter
Inches
A Inches
B Inches
For speeds up to 14,200 SFPM
*Hot Rolled Steel SAE 1008 min.
									 tensile strength 60,000 PSI
3/8 inches or less
2 to 9
1/16
1/2
Over 3/8 to 1 inch
7 to 9
3/32
1 1/8
*The recommendations listed in the
									 above table are guides for the conditions stated. Other material, designs or
									 dimensions affording equal or superior protection are also acceptable.
TABLE 4 TABLE FOR FABRICATED
									 STEEL GUARDS FOR SQUARED OR TAPERED CUP WHEELS
Wheel Diameter*
Back Thickness
*Band Thickness
Bolts Connecting
Band to
									 Back
Member
4"
.056 .064
.112 .128
3 5/16 18
5"
.082 .098
.112 .128
3 5/16 18
6"
.082 .098
.112 .128
3 3/8 16
TABLE 5 TABLE FOR DRAWN STEEL
									 GUARDS FOR TAPERED CUP WHEELS
Wheel Diameter
"A"
No.
Bolts to Machine
No.
Bolts
Connecting
Hood to Band
Washer Back Plate Thickness
"B" O.D.
*"C" Hood
*"D" Band
4"
1 7/8
4
1/4 20
3
5/16 18 x 3/4
.097 .112
4
.056 .064
.112 .128
5"
2 1/8
4
5/16 18
3
5/16 18 x 3/4
.097 .112
4 3/4
.082 .098
.112 .128
6"
2 5/8
4
5/16 18
4
5/16 18 x 3/4
.097 .112
4 3/4
.082 .098
.112 .128
*The recommendations listed in the
									 above tables are guides for the conditions stated. Other material, designs or
									 dimensions affording equal or superior protection are also acceptable.
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TABLE 7
MINIMUM
									 BASIC THICKNESS FOR PERIPHERAL AND SIDE
MEMBERS FOR SAFETY GUARDS
									 USED WITH CUTTING-OFF WHEELS
Material Used
in
Construction
of Guard
Maximum Thickness of Cutting
									 Off Wheel
Speed Not to Exceed
Cutting Off Wheel
									 Diameters
6 to 11 inches
Over 11 to 20 inches
Over 20 to 30 inches
Over 30 to 48 inches
Over 48 to 72 inches
A
B
A
B
A
B
A
B
A
B
*Structural Steel (Min. Tensile
									 Strength 60,000 PSI)
1/2 inch or less
14,200 SFPM
1/16
1/16
3/32
3/32
1/8
1/8
3/16
3/16
1/4
1/4
1/2 inch or less
16,000 SFPM
3/32
1/8
1/8
1/8
3/16
1/8
1/4
3/16
5/16
1/4
*The recommendations listed in the
									 above table are guides for the conditions stated. Other material, designs or
									 dimensions affording equal or superior protection are also acceptable.
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NOTE: Column D assumes low carbon steel (38,000 PSI
						  tensile) rivets. Two rivets per bar 12 and 16" diameter. For rivets per bar 24
						  and 30" diameter.
TABLE 9
GUIDE FOR
									 CONSTRUCTION OF BAND TYPE GUARDS
Maximum Wheel Speed 7000 SFPM For
									 Ring, Segment, Nut Inserted Wheels
Maximum
Material
Specifications
Diameter of Wheel
Minimum
Thickness of
Band A
Minimum
Diameter of
Rivets
Maximum Distance Between Centers of
									 Rivets
Inches
Inches
Inches
Inches
*Hot Rolled Steel SAE 1008
Under 8
1/16
3/16
3/4
8 to 24
1/8
1/4
1
Over 24 to 30
1/4
3/8
1 1/4
* The recommendations listed in the
									 above table are guides for the conditions stated. Other material, designs or
									 dimensions affording equal or superior protection are also acceptable.
TABLE 10
GUIDE
									 FOR CONSTRUCTION OF BAND TYPE GUARDS
EXPOSURE VERSUS WHEEL
									 THICKNESS
Overall Thickness of Wheel (T)
									 Inches
Maximum Exposure of Wheel (C)
									 Inches
1/2
1/4
1
1/2
2
3/4
3
1
4
1 1/2
5 and over
2
TABLE 11 MINIMUM DIMENSIONS
									 FOR STRAIGHT RELIEVED FLANGES
A*
B
C
D
E
Diameter of Wheel
**Minimum Outside
Diameter of Flanges
Radial Width of Bearing
									 Surface
Minimum
Thickness
									 of
Flange at
Bore
Minimum
Thickness
									 of
Flange at
Edge of
Recess
Minimum
Maximum
Inches
Inches
Inches
Inches
Inches
Inches
1
3/8
1/16
1/8
1/16
1/16
2
3/4
1/8
3/16
1/8
3/32
3
1
1/8
3/16
3/16
3/32
4
1 3/8
1/8
3/16
3/16
1/8
5
1 3/4
3/16
1/4
1/4
1/8
6
2
1/4
1/2
3/8
3/16
7
2 1/2
1/4
1/2
3/8
3/16
8
3
1/4
1/2
3/8
3/16
10
3 1/2
5/16
5/8
3/8
1/4
12
4
5/16
5/8
1/2
5/16
14
4 1/2
3/8
3/4
1/2
5/16
16
5 1/2
1/2
1
1/2
5/16
18
6
1/2
1
5/8
3/8
20
7
5/8
1 1/4
5/8
3/8
22
7 1/2
5/8
1 1/4
5/8
7/16
24
8
3/4
1 1/4
5/8
7/16
26
8 1/2
3/4
1 1/4
5/8
1/2
28
10
7/8
1 1/2
3/4
1/2
30
10
7/8
1 1/2
3/4
5/8
36
12
1
2
7/8
3/4
42
14
1
2
7/8
3/4
48
16
1 1/4
2
1 1/8
1
60
20
1 1/4
2
1 1/4
1 1/8
72
24
1 1/2
2 1/2
1 3/8
1 1/4
* Flanges for wheels under 2 inches
									 diameter may be unrelieved and shall be maintained flat and true. * * See rule
									 141.
TABLE 12 MINIMUM DIMENSIONS
									 FOR STRAIGHT UNRELIEVED FLANGES FOR WHEELS WITH THREADED INSERTS OR PROJECTING
									 STUDS
A
B*
T
Diameter of Wheel
Minimum Outside Diameter of Flange
Minimum Thickness of Flange
Inches
Inches
Inches
1
5/8
1/8
2
1
1/8
3
1
3/16
4
1 3/8
3/16
5
1 3/4
1/4
6
2
3/8
* NOTE: Must be large enough to
									 extend beyond the bushing. Where prong anchor or cupback bushing are used, this
									 footnote does not apply.
TABLE 13
MINIMUM
									 DIMENSIONS FOR STRAIGHT ADAPTOR FLANGE
FOR ORGANIC BONDED WHEELS
									 OVER 1 1/4 INCH THICK
Wheel Diameter
Wheel Hole Diameter
B
D
E
F*
Minimum
Flange
Diameter
Minimum
Thickness
of Flange
at Bore
Minimum Thickness of Flange at Edge of
									 Undercut
(D-E) Minimum Thickness
Inches
Inches
Inches
Inches
Inches
Inches
12 to 14
4
6
7/8
3/8
1/2
5
7
7/8
3/8
1/2
6
8
7/8
3/8
1/2
Larger than 14 to 18
4
6
7/8
3/8
1/2
5
7
7/8
3/8
1/2
6
8
7/8
3/8
1/2
7
9
7/8
3/8
1/2
8
10
7/8
3/8
1/2
Larger than 18 to 24
6
8
1
1/2
1/2
7
9
1
1/2
1/2
8
10
1
1/2
1/2
10
12
1
1/2
1/2
12
14
1
1/2
1/2
Larger than 24 to 30
12
15
1
1/2
1/2
Larger than 30 to 36
12
15
1 3/8
7/8
1/2
* For wheels under 1 1/4 inch thick
									 F dimension shall not exceed 40% of wheel thickness.
TABLE 14
MINIMUM
									 DIMENSIONS FOR STRAIGHT FLANGES
FOR AUTOMATIC SNAG MACHINES 12,500
									 S.F.P.M. TO 16,500 S.F.P.M.1
Wheel Diameter
Wheel Hole Diameter
B
D
E
F*
Minimum
Flange
Diameter
Minimum
Thickness of
Flange at
Bore
Minimum
Thickness of
Flange at Edge
of Undercut
(D-E) Minimum Thickness
20
6
8
1
1/2
1/2
20
8
10
1 1/2
3/4
3/4
24
12
15
1 1/2
3/4
3/4
30
12
15
1 1/2
3/4
3/4
36
12
15
1 1/2
3/4
3/4
1 FLANGES shall be of
									 steel, quality SAE 1040 or equivalent, annealed plate, heat treated to R
									 c 25-30. * For wheels under 1 1/4 inch thick F dimension
									 shall not exceed 40% of wheel thickness.
TABLE 15
MINIMUM
									 DIMENSIONS FOR STRAIGHT ADAPTOR FLANGE
FOR ORGANIC BONDED WHEELS
									 USED ON SWING FRAME GRINDERS
AT 12,500 S.F.P.M. TO 16,500
									 S.F.P.M.
1
Wheel Diameter
Wheel Hole Diameter
B
D
E
F*
Minimum
Flange
Diameter
Minimum
Thickness of
Flange at
Bore
Minimum
Thickness of
Flange at Edge
of Undercut
(D-E) Minimum Thickness
20
6
8
1
1/2
1/2
20
8
10
1
1/2
1/2
24
12
15
1
1/2
1/2
30
12
15
1
1/2
1/2
1 FLANGES shall be of
									 steel, quality SAE 1040 or equivalent, annealed plate, heat treated to R
									 c 25-30. * For wheels under 1 1/4 inch thick F dimension
									 shall not exceed 40% of wheel thickness.
TABLE 16
MINIMUM
									 DIMENSIONS FOR STRAIGHT FLANGES FOR HEAVY DUTY,
HIGH SPEED FLOOR
									 STAND GRINDERS1
12,500 S.F.P.M. TO
									 16,5000 S.F.P.M.
Wheel Diameter
Hole Diameter
B
D
Minimum Flange Diameter
Minimum Thickness of Flange at Bore
20
6 thru 10
8 thru 12
1
24
12
15
1
30
12
15
1
1 FLANGES shall be of
									 steel, quality SAE 1040 or equivalent, annealed plate, heat treated to R
									 c 25-30.
TABLE 17
MINIMUM
									 DIMENSIONS FOR FLANGES
FOR ARBORLESS WHEELS ORGANIC BOND
Wheel Diameter
Bolt Circle
"B" Minimum
Flange
Diameter
Torque Used in Mounting Ft. Lbs.
Minimum Hole Size Dimensions. (8 holes)
									 (holes equally spaced)
16
6 1/2
8 7/8
30-40
All mounting holes shall be 17/32"
									 inside diameter, with a fiber bushing in place, not to exceed 21/32" outside
									 diameter.
20
8
10 3/8
30-40
24
9 5/8
12
40-60
30
12
14 3/8
40-60
TABLE 18
MINIMUM
									 DIMENSIONS FOR STRAIGHT FLANGES
USED AS WHEEL SLEEVES FOR
									 PRECISION GRINDING ONLY
Wheel Diameter
Wheel Hole Diameter
B
D
E
Minimum
Outside
Diameter of
Flange
Minimum Thickness of Flange at Bore
Minimum
Thickness of
Flange at Edge of
Undercut
Inches
Inches
Inches
Inches
Inches
12 to 14
5
7
1/2
7/16
Larger than 14 to 20
5
7
5/8
7/16
6
8
5/8
7/16
8
10
5/8
7/16
10
11 1/2
5/8
7/16
12
13 1/2
5/8
7/16
Larger than 20 to 30
8
10
3/4
1/2
10
11 1/2
3/4
1/2
12
13 1/2
3/4
1/2
16
17 1/2
3/4
1/2
Larger than 30 to 42
12
13 1/2
3/4
1/2
16
17 1/2
3/4
1/2
18
19 1/2
3/4
1/2
20
21 1/2
3/4
1/2
Larger than 42 to 60
16
20
1
3/4
20
24
1
3/4
24
29
1 1/8
7/8
Note: These flanges may be clamped
									 together by means of a central nut, or by a series of bolts or some other
									 equivalent means of fastening. For hole sizes smaller than shown in this table,
									 use table 9.
TABLE 19
MINIMUM
									 THICKNESS OF STEEL DISC WHEELS
(MACHINE FACE PLATE) FOR MOUNTING
									 ABRASIVE DISCS
Diameter Inches
Minimum Thickness Inches
8 to 14 inclusive
1/2
15 to 18 inclusive
5/8
19 to 26 inclusive
3/4
27 to 36 inclusive
7/8
37 to 40 inclusive
1
41 to 72 inclusive
1 1/8
TABLE 20
MINIMUM
									 THICKNESS OF STEEL DISC WHEELS
FOR MACHINES USING PLATE MOUNTED
									 WHEELS HAVING THIN MOUNTING
PLATES
Abrasive Disc Diameter D (Inches)
Minimum Thickness Pt (Inches)
12 and smaller
3/8
14 to 16 inclusive
1/2
17 to 18 inclusive
5/8
19 to 26 inclusive
3/4
27 to 36 inclusive
7/8
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TABLE 22 WHEEL MANUFACUTERS
									 TESTING SPEEDS
Class of Wheel
Operating Speed Surface Feet Per
									 Minute
Minimum Test Factor*
Cutting-off Wheels
All speeds
1.20
All Bonds and Wheel Types (Except Cutting-off
									 Wheels)
Up to 5,000
1.25
All Bonds and Wheel Types (Except Cutting-off
									 wheels)
Faster than 5,000
1.50
* Actual operating speed shall be
									 multiplied by this test factor to establish minimum speed at which wheels shall
									 be tested by the wheel manufacturer.
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