Section R. 408.10199 - TablesRule 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 2GUIDE FOR CONSTRUCTION OF DRAWN STEEL GUARDS FOR WHEEL2" THICK AND LESS, 8" AND LESS IN DIAMETER |
| *Material Used in Construction of Guard Hot Rolled Steel SAE1008 Min. TensileStrength 60,000 PSI forspeeds up to (SFPM) | MaximumThickness ofWheel,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 3DRAWN STEEL GUARD FOR PORTABLE GRINDERSUSED WITH DEPRESSED CENTER WHEELS |
| Material Used in Construction of Guard | Thickness of Wheel | WheelDiameterInches | 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 ConnectingBand to BackMember |
| 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. | BoltsConnectingHood 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 7MINIMUM BASIC THICKNESS FOR PERIPHERAL AND SIDEMEMBERS FOR SAFETY GUARDS USED WITH CUTTING-OFF WHEELS |
| Material UsedinConstructionof 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 9GUIDE FOR CONSTRUCTION OF BAND TYPE GUARDSMaximum Wheel Speed 7000 SFPM For Ring, Segment, Nut Inserted Wheels |
| MaximumMaterialSpecifications | Diameter of Wheel | MinimumThickness ofBand A | MinimumDiameter ofRivets | 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 10GUIDE FOR CONSTRUCTION OF BAND TYPE GUARDSEXPOSURE 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 OutsideDiameter of Flanges | Radial Width of Bearing Surface | MinimumThickness ofFlange atBore | MinimumThickness ofFlange atEdge ofRecess |
| 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 13MINIMUM DIMENSIONS FOR STRAIGHT ADAPTOR FLANGEFOR ORGANIC BONDED WHEELS OVER 1 1/4 INCH THICK |
| Wheel Diameter | Wheel Hole Diameter | B | D | E | F* |
| MinimumFlangeDiameter | MinimumThicknessof Flangeat 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 14MINIMUM DIMENSIONS FOR STRAIGHT FLANGESFOR 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* |
| MinimumFlangeDiameter | MinimumThickness ofFlange atBore | MinimumThickness ofFlange at Edgeof 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 15MINIMUM DIMENSIONS FOR STRAIGHT ADAPTOR FLANGEFOR ORGANIC BONDED WHEELS USED ON SWING FRAME GRINDERSAT 12,500 S.F.P.M. TO 16,500 S.F.P.M.1 |
| Wheel Diameter | Wheel Hole Diameter | B | D | E | F* |
| MinimumFlangeDiameter | MinimumThickness ofFlange atBore | MinimumThickness ofFlange at Edgeof 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 16MINIMUM DIMENSIONS FOR STRAIGHT FLANGES FOR HEAVY DUTY,HIGH SPEED FLOOR STAND GRINDERS112,500 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 17MINIMUM DIMENSIONS FOR FLANGESFOR ARBORLESS WHEELS ORGANIC BOND |
| Wheel Diameter | Bolt Circle | "B" MinimumFlangeDiameter | 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 18MINIMUM DIMENSIONS FOR STRAIGHT FLANGESUSED AS WHEEL SLEEVES FOR PRECISION GRINDING ONLY |
| Wheel Diameter | Wheel Hole Diameter | B | D | E |
| MinimumOutsideDiameter ofFlange | Minimum Thickness of Flange at Bore | MinimumThickness ofFlange at Edge ofUndercut |
| 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 19MINIMUM 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 20MINIMUM THICKNESS OF STEEL DISC WHEELSFOR MACHINES USING PLATE MOUNTED WHEELS HAVING THIN MOUNTINGPLATES |
| 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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Mich. Admin. Code R. 408.10199