Mich. Admin. Code R. 408.10199 - Tables

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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
	Maximum Thickness of Wheel, 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
For speeds up to 14,200 SFPM	*Hot Rolled Steel SAE 1008 min. tensile strength 60,000 PSI	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

*Structural Steel (Min. Tensile Strength 60,000 PSI)

1/2 inch or less

14,200 SFPM

1/16

3/32

1/8

3/16

1/4

1/2 inch or less

16,000 SFPM

3/32

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
Maximum Material Specifications	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
Diameter of Wheel	Minimum Outside Diameter of Flanges**	Minimum	Maximum	Minimum Thickness of Flange at Bore
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*
Wheel Diameter	Wheel Hole Diameter	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*
Wheel Diameter	Wheel Hole Diameter	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*
Wheel Diameter	Wheel Hole Diameter	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
Wheel Diameter	Hole Diameter	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
Wheel Diameter	Wheel Hole Diameter	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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Notes

Mich. Admin. Code R. 408.10199

1990 AACS

State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.

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