Regulations (Standards - 29 CFR) - Table of Contents |
Part Number: | 1910 |
Part Title: | Occupational Safety and Health Standards |
Subpart: | O |
Subpart Title: | Machinery and Machine Guarding |
Standard Number: | 1910.215 |
Title: | Abrasive wheel machinery. |
1910.215(a)(1)(i)
1910.215(a)(1)(ii)
1910.215(a)(1)(iii)
1910.215(a)(2)(ii)
1910.215(a)(3)
1910.215(a)(5)
1910.215(b)
1910.215(b)(1)
1910.215(b)(1)(i)
1910.215(b)(1)(ii)
1910.215(b)(1)(iii)
1910.215(b)(2)
1910.215(b)(3)
(For Figure Nos. O-6 and O-7, Click Here) Wherever the nature of the work requires contact with the wheel below the horizontal plane of the spindle, the exposure shall not exceed 125 deg. (See Figures O-8 and O-9.) (For Figure Nos. O-8 and O-9, Click Here) 1910.215(b)(4)
(For Figure Nos. O-10 and O-11, Click Here) 1910.215(b)(5)
(For Figure Nos. O-12 and O-13, Click Here) 1910.215(b)(6)
(For Figure Nos. O-14 and O-15, Click Here) 1910.215(b)(7)
1910.215(b)(8)
(For Figure Nos. O-16 and O-17, Click Here) 1910.215(b)(9)
1910.215(b)(10)
1910.215(b)(10)(i)
1910.215(b)(10)(ii)
1910.215(b)(10)(iii)
1910.215(b)(10)(iv)
(For Figure Nos. O-18 and O-19, Click Here) CORRECT Showing adjustable tongue giving required angular protection for all sizes of wheel used. (For Figure Nos. O-20 and O-21, Click Here) Showing movable guard with opening small enough to give required protection for smallest size wheel used. (For Figure Nos. O-22 and O-23, Click Here) Showing movable guard with size of opening correct for full size wheel but too large for smaller wheels. 1910.215(b)(10)(v)
1910.215(b)(10)(vi)
1910.215(b)(11)
1910.215(b)(11)(i)
1910.215(b)(11)(ii)
1910.215(b)(11)(iii)
1910.215(b)(12)
1910.215(c)
1910.215(c)(1)
1910.215(c)(1)(i)
1910.215(c)(1)(i)(a)
1910.215(c)(1)(i)(b)
1910.215(c)(1)(i)(c)
1910.215(c)(1)(i)(d)
1910.215(c)(1)(i)(e)
1910.215(c)(1)(i)(f)
1910.215(c)(1)(i)(g)
1910.215(c)(1)(i)(h)
1910.215(c)(1)(i)(i)
1910.215(c)(1)(ii)
1910.215(c)(1)(iii)
1910.215(c)(1)(iv)
1910.215(c)(1)(iv)(a)
1910.215(c)(1)(iv)(b)
1910.215(c)(1)(iv)(c)
1910.215(c)(1)(v)
(For Figure No. O-24, Click Here)
1910.215(c)(2)
1910.215(c)(3)
1910.215(c)(4)
1910.215(c)(4)(i)
1910.215(c)(4)(ii)
(For Figure No. O-24-A, Click Here)
1910.215(c)(4)(iii)
1910.215(c)(5)
1910.215(c)(5)(i)
1910.215(c)(5)(ii)
1910.215(c)(6)
1910.215(c)(6)(i)
1910.215(c)(6)(ii)
1910.215(c)(6)(ii)(a)
1910.215(c)(6)(ii)(b)
1910.215(c)(6)(ii)(c)
1910.215(c)(6)(ii)(d)
1910.215(c)(6)(ii)(e)
1910.215(c)(6)(ii)(f)
1910.215(c)(6)(ii)(g)
1910.215(c)(6)(ii)(h)
1910.215(c)(6)(ii)(i)
1910.215(c)(6)(ii)(j)
1910.215(c)(7)
1910.215(c)(8)
1910.215(c)(8)(i)
1910.215(c)(8)(ii)
1910.215(c)(8)(iii)
1910.215(c)(9)
1910.215(d)
1910.215(d)(1)
1910.215(d)(1)(i)
(For Figure Nos. O-25 and O-26, Click Here) 1910.215(d)(1)(ii)
1910.215(d)(2)
1910.215(d)(4)
1910.215(d)(5)
1910.215(d)(5)(i)
1910.215(d)(5)(ii)
1910.215(d)(5)(iii)
1910.215(d)(5)(iv)
1910.215(d)(5)(v)
1910.215(d)(5)(vi)
1910.215(d)(5)(vii)
1910.215(d)(5)(viii)
1910.215(d)(5)(ix)
1910.215(d)(6)
(For Figure Nos. O-27 and O-28, Click Here) TABLE O-1 - MINIMUM BASIC THICKNESS FOR PERIPHERAL AND SIDE MEMBERS FOR SAFETY GUARDS USED WITH CUTTING-OFF WHEELS _____________________________________________________________________ | | | Material | Maximum | | Cutting off wheel diameters used | thickness | Speed |_________________________________ in | of | not | | | construction| cutting | to | 6 to 11 | Over 11 to |Over 20 to of | off | exceed | inches | 20 inches | 30 inches guard | wheel | |_________|____________|___________ | | | | | | | | | | | A | B | A | B | A | B _____________|____________|________|____|____|______|_____|_____|_____ | | | | | | | | Structural | 1/2 inch | 14,200 | | | | | | steel (min. | or less... | SFPM...|1/16|1/16| 3/32 | 3/32| 1/8 | 1/8 tensile | | | | | | | | strength | | | | | | | | 60,000 | 1/2 inch | 16,000 | | | | | | p.s.i.). | or less... | SFPM...|3/32| 1/8| 1/8 | 1/8 | 3/16| 1/8 _____________|____________|________|____|____|______|_____|_____|_____ TABLE O-1 - MINIMUM BASIC THICKNESS FOR PERIPHERAL AND SIDE MEMBERS FOR SAFETY GUARDS USED WITH CUTTING-OFF WHEELS (Continued) _________________________________________________________________ | | | Material | Maximum | | Cutting off wheel diameters used | thickness | Speed |_____________________________ in | of | not | | construction| cutting | to | Over 30 to | Over 48 to of | off | exceed | 48 inches | 72 inches guard | wheel | |____________|_______________ | | | | | | | | | A | B | A | B _____________|____________|________|______|_____|______|________ | | | | | | Structural | 1/2 inch | 14,200 | | | | steel (min. | or less... | SFPM...| 3/16 | 3/16| 1/4 | 1/4 tensile | | | | | | strength | | | | | | 60,000 | 1/2 inch | 16,000 | | | | p.s.i.). | or less... | SFPM...| 1/4 | 3/16| 5/16 | 1/4 _____________|____________|________|______|_____|______|_______ (For Figure No. O-29, Click Here) TABLE O-3 - GUIDE FOR CONSTRUCTION OF BAND TYPE GUARDS [Maximum Wheel Speed 7,000 SFPM] __________________________________________________________________ | | | | Minimum | | Minimum | Minimum | Maximum material | Diameter | thickness | diameter | distance specifications| of | of band A | of rivets | between | wheel | | | centers | | | | of rivets ______________|_______________|___________|___________|___________ | | 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 ______________|_______________|___________|___________|___________ (For Figure Nos. O-30 and O-31, Click Here) TABLE O-5 - MINIMUM DIMENSIONS FOR STRAIGHT ADAPTOR FLANGE -- FOR ORGANIC BONDED WHEELS OVER 1 1/2 INCHES THICK(1) (In inches) ____________________________________________________________________ | | | | | | | B- | D- | E- | F(1)- | Wheel | Minimum | Minimum | Minimum | (D-E) Wheel | hole | flange | thickness | thickness | minimum diameter | diameter | diameter | of flange | of flange | thickness | | | at bore | at edge of| | | | | undercut | ___________|__________|__________|___________|___________|__________ | | | | | 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 ___________|__________|__________|___________|___________|__________ Footnote(1) For wheels under 1 1/4 inches thick F dimension shall not exceed 40 percent of wheel thickness. (For Figure No. O-32, Click Here) TABLE O-6 - MINIMUM DIMENSIONS FOR STRAIGHT RELIEVED FLANGES(1) (In inches) __________________________________________________________________ | | | | A-- | B-- | C-- Radial width of | D-- | E-- Diameter| Minimum | bearing surface | Minimum | Minimum of | outside |_____________________| thickness | thickness Wheel | diameter| | | of | of flange | of | Minimum | Maximum | flange | at edge | flanges | | | at bore | of recess ________|_________|__________|__________|___________|_____________ | | | | | 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 ________|_________|__________|__________|___________|_________ Footnote(1) Flanges for wheels under 2 inches diameter may be unrelieved and shall be maintained flat and true. (For Figure Nos. O-33 and O-34, Click Here) TABLE O-7 - MINIMUM DIMENSIONS FOR STRAIGHT FLANGES - FOR MECHANICAL GRINDERS 12,500 S.F.P.M. TO 16,5 S.F.P.M.(1) ____________________________________________________________________ | | | | | | | | D-- | E-- | F(2)-- | Wheel | B-- | Minimum | Minimum | (D-E) Wheel | hole | Minimum | thickness | thickness | minimum Diameter | diameter | flange | of | of flange | thickness | | diameter | flange | at edge of | | | | at bore | undercut | __________|__________|__________|___________|____________|___________ | | | | | 20 | 6 | 8 | 1 | 1/2 | 1/2 20 | 8 | 10 | 1 1/2 | 3/4 | 3/4 24 | 12 | 15 | 2 | 1 | 1 30 | 12 | 15 | 2 | 1 | 1 36 | 12 | 15 | 2 | 1 | __________|__________|__________|___________|____________|__________ Footnote(1) Flanges shall be of steel, quality SAE 1040 or equivalent, annealed plate, heat treated to R.25-30. Footnote(2) For wheels under 1 1/4 inch thick F dimension shall not exceed 40 percent of wheel thickness. (For Figure No. O-35, Click Here) TABLE O-8 - MINIMUM DIMENSIONS FOR STRAIGHT FLANGES USED AS WHEEL SLEEVES FOR PRECISION GRINDING ONLY (In inches) ________________________________________________________________ | | | | | | B-- | D-- | E-- Wheel | Wheel | Minimum | Minimum | Minimum diameter | hole | outside | thickness | thickness | diameter | diameter | of flange | of flange | | of flange | at bore | at edge of | | | | undercut _______________|__________|___________|___________|_____________ | | | | 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 12. (For Figure Nos. O-36 and O-37, Click Here) TABLE O-9 - MINIMUM BASIC THICKNESS OF PERIPHERAL AND SIDE MEMBERS FOR SAFETY GUARDS (In inches) ____________________________________________________________________ | | | Material used |Maxi- | Grinding wheel diameters | in construction |mum |___________________________________________| of guard |thick-| | | | |ness | 3 to 6 | Over 6 to | Over 12 to | |of | inches | 12 inches | 16 inches | |grind-|_____________|______________|______________| |ing | | | | | | | |wheel | A | B | A | B | A | B | _________________|______|______|______|______|_______|_______|______| | | | | | | | | Material | 2 | 1/4 | 1/4 | 3/8 | 5/16 | 1/2 | 3/8 | satisfactory(1) | 4 | 5/16 | 5/16 | 3/8 | 5/16 | 1/2 | 3/8 | for speeds up | 6 | 3/8 | 5/16 | 1/2 | 7/16 | 5/8 | 1/2 | to 8,000 SFPM. | 8 | | | 5/8 | 9/16 | 7/8 | 3/4 | | 10 | | | 3/4 | 11/16 | 7/8 | 3/4 | | 16 | | | | | 1 1/8 | 1 | | 20 | | | | | | | Cast iron | | | | | | | | (min. tensile | | | | | | | | strength | | | | | | | | 20,000 p.s.i.) | | | | | | | | Class 20. | | | | | | | | _________________|______|______|______|______|_______|_______|______| | | | | | | | | Material | | | | | | | | satisfactory(1) | 2 | 1/4 | 1/4 | 3/8 | 5/16 | 1/2 | 3/8 | for speeds up | 4 | 5/16 | 5/16 | 3/8 | 5/16 | 1/2 | 3/8 | to 9,000 SFPM. | 6 | 3/8 | 5/16 | 1/2 | 7/16 | 5/8 | 1/2 | | 8 | | | 1/2 | 7/16 | 5/8 | 1/2 | | 10 | | | 1/2 | 7/16 | 5/8 | 1/2 | | 16 | | | | | 13/16 |11/16 | | 20 | | | | | | | Malleable iron | | | | | | | | (min. tensile | | | | | | | | strength | | | | | | | | 50,000 p.s.i.) | | | | | | | | Grade 32510. | | | | | | | | | | | | | | | | Materials | | | | | | | | satisfactory(1) | 2 | 1/4 | 1/4 | 5/16 | 5/16 | 3/8 | 3/8 | for speeds up | 4 | 1/4 | 1/4 | 1/2 | 1/2 | 1/2 | 1/2 | to 16,000 SFPM. | 6 | 3/8 | 1/4 | 3/4 | 5/8 | 3/4 | 5/8 | | 8 | | | 7/8 | 3/4 | 7/8 | 3/4 | | 10 | | | 1 | 7/8 | 1 | 7/8 | | 16 | | | | | 1 1/4 |1 1/8 | | 20 | | | | | | | | | | | | | | | Steel castings | | | | | | | | (min. tensile | | | | | | | | strength | | | | | | | | 60,000 p.s.i.) | | | | | | | | Grade V60-30 | | | | | | | | _________________|______|______|______|______|_______|_______|______| | | | | | | | | Structural | 2 | 1/8 | 1/16 | 5/16 | 1/4 | 5/16 | 1/4 | steel | 4 | 1/8 | 1/16 | 3/8 | 5/16 | 3/8 | 5/16 | (min. tensile | 6 | 3/16 | 1/16 | 1/2 | 3/8 | 7/16 | 3/8 | strength | 8 | | | 1/2 | 3/8 | 9/16 | 7/16 | 60,000 p.s.i.) | 10 | 9/16 | 7/16 | 5/8 | 1/2 | 5/8 | 1/2 | | 16 | | | | | 5/8 | 9/16 | | 20 | | | | | | | _________________|______|______|______|______|_______|_______|______| TABLE O-9 - MINIMUM BASIC THICKNESS OF PERIPHERAL AND SIDE MEMBERS FOR SAFETY GUARDS (In inches) [Continued] _________________________________________________________ | | | Material used |Maxi- | Grinding wheel diameters | in construction |mum |________________________________| of guard |thick-| | | |ness | Over 16 to | Over 20 to | |of | 20 inches | 24 inches | |grind-|_______________|________________| |ing | | | | | |wheel | A | B | A | B | _________________|______|_______|_______|________|_______| | | | | | | Material | 2 | 5/8 | 1/2 | 7/8 | 5/8 | satisfactory(1) | 4 | 3/4 | 5/8 | 1 | 5/8 | for speeds up | 6 | 1 | 5/8 | 1 1/8 | 3/4 | to 8,000 SFPM. | 8 | 1 | 3/4 | 1 1/8 | 3/4 | | 10 | 1 | 3/4 | 1 1/8 | 3/4 | | 16 | 1 1/4 | 1 | 1 5/16 | 1 | | 20 | 1 3/8 | 1 1/8 | 1 3/8 | 1 1/8 | Cast iron | | | | | | (min. tensile | | | | | | strength | | | | | | 20,000 p.s.i.) | | | | | | Class 20. | | | | | | _________________|______|_______|_______|________|_______| | | | | | | Material | | | | | | satisfactory(1) | 2 | 5/8 | 1/2 | 3/4 | 5/8 | for speeds up | 4 | 5/8 | 1/2 | 3/4 | 5/8 | to 9,000 SFPM. | 6 | 3/4 | 5/8 | 7/8 | 5/8 | | 8 | 3/4 | 5/8 | 7/8 | 5/8 | | 10 | 3/4 | 5/8 | 7/8 | 5/8 | | 16 | 13/16 | 11/16 | 1 | 3/4 | | 20 | 7/8 | 3/4 | 1 | 3/4 | Malleable iron | | | | | | (min. tensile | | | | | | strength | | | | | | 50,000 p.s.i.) | | | | | | Grade 32510. | | | | | | | | | | | | Materials | | | | | | satisfactory(1) | 2 | 1/2 | 7/16 | 5/8 | 1/2 | for speeds up | 4 | 9/16 | 1/2 | 5/8 | 1/2 | to 16,000 SFPM. | 6 | 3/4 | 5/8 | 13/16 | 11/16 | | 8 | 7/8 | 3/4 | 7/8 | 3/4 | | 10 | 1 | 7/8 | 1 1/8 | 15/16 | | 16 | 1 1/4 | 1 1/8 | 1 1/4 | 1 1/8 | | 20 | 1 3/8 | 1 1/4 | 1 3/8 | 1 1/4 | | | | | | | Steel castings | | | | | | (min. tensile | | | | | | strength | | | | | | 60,000 p.s.i.) | | | | | | Grade V60-30 | | | | | | _________________|______|_______|_______|________|_______| | | | | | | Structural | 2 | 5/16 | 1/4 | 5/16 | 1/4 | steel | 4 | 3/8 | 5/16 | 3/8 | 5/16 | (min. tensile | 6 | 7/16 | 3/8 | 7/16 | 3/8 | strength | 8 | 9/16 | 7/16 | 9 | | 60,000 p.s.i.) | 10 | 5/8 | 1/2 | 5/8 | 1/2 | | 16 | 3/4 | 5/8 | 3/4 | 5/8 | | 20 | 13/16 | 11/16 | 13/16 | 11/16 | _________________|______|_______|_______|________|_______| TABLE O-9 - MINIMUM BASIC THICKNESS OF PERIPHERAL AND SIDE MEMBERS FOR SAFETY GUARDS (In inches) [Continued] ______________________________________________________________ | | | Material used |Maxi- | Grinding wheel diameters | in construction |mum |_____________________________________| of guard |thick-| | | |ness | Over 24 to | Over 30 to | |of | 30 inches | 48 inches | |grind-|_________________|___________________| |ing | | | | | |wheel | A | B | A | B | _________________|______|________|________|_________|_________| | | | | | | Material | 2 | 1 | 3/4 | 1 1/4 | 1 | satisfactory(1) | 4 | 1 1/8 | 3/4 | 1 3/8 | 1 | for speeds up | 6 | 1 1/4 | 7/8 | 1 1/2 | 1 1/8 | to 8,000 SFPM. | 8 | 1 1/4 | 7/8 | 1 1/2 | 1 1/8 | | 10 | 1 1/4 | 7/8 | 1 1/2 | 1 1/8 | | 16 | 1 7/16 | 1 1/16 | 1 3/4 | 1 3/8 | | 20 | 1 1/2 | 1 3/8 | 2 | 1 5/8 | Cast iron | | | | | | (min. tensile | | | | | | strength | | | | | | 20,000 p.s.i.) | | | | | | Class 20. | | | | | | _________________|______|________|________|_________|_________| | | | | | | Material | | | | | | satisfactory(1) | 2 | 7/8 | 3/4 | 1 | 7/8 | for speeds up | 4 | 7/8 | 3/4 | 1 1/8 | 7/8 | to 9,000 SFPM. | 6 | 1 | 3/4 | 1 1/4 | 7/8 | | 8 | 1 | 3/4 | 1 1/4 | 7/8 | | 10 | 1 | 3/4 | 1 1/4 | 7/8 | | 16 | 1 1/8 | 7/8 | 1 3/8 | 1 | | 20 | 1 1/8 | 7/8 | 1 1/2 | 1 1/8 | Malleable iron | | | | | | (min. tensile | | | | | | strength | | | | | | 50,000 p.s.i.) | | | | | | Grade 32510. | | | | | | | | | | | | Materials | | | | | | satisfactory(1) | 2 | 3/4 | 5/8 | 7/8 | 3/4 | for speeds up | 4 | 3/4 | 5/8 | 1 | 3/4 | to 16,000 SFPM. | 6 | 13/16 | 11/16 | 1 1/8 | 3/4 | | 8 | 15/16 | 13/16 | 1 3/8 | 1 | | 10 | 1 1/8 | 1 | 1 7/16 | 1 1/16 | | 16 | 1 1/4 | 1 1/8 | 1 13/16 | 1 7/16 | | 20 | 1 7/16 | 1 5/16 | 2 1/16 | 1 11/16 | | | | | | | Steel castings | | | | | | (min. tensile | | | | | | strength | | | | | | 60,000 p.s.i.) | | | | | | Grade V60-30 | | | | | | _________________|______|________|________|_________|_________| | | | | | | Structural | 2 | 3/8 | 5/16 | 1/2 | 3/8 | steel | 4 | 3/8 | 5/16 | 1/2 | 3/8 | (min. tensile | 6 | 7/16 | 3/8 | 3/4 | 1/2 | strength | 8 | | | | | 60,000 p.s.i.) | 10 | 7/8 | 5/8 | | | | 16 | 13/16 | 11/16 | 1 1/16 | 13/16 | | 20 | 7/8 | 3/4 | 1 3/16 | 15/16 | _________________|______|________|________|_________|_________| Footnote(1) 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 O-2 - EXPOSURE VERSUS WHEEL THICKNESS [in inches] ________________________________________________ | | Maximum Overall thickness of wheel (T) | exposure | of wheel (C) _________________________________|______________ | 1/2 .............................| 1/4 1 ...............................| 1/2 2 ...............................| 3/4 3 ...............................| 1 4 ...............................| 1 1/2 5 and over ......................| 2 _________________________________|______________ TABLE O-4 - MINIMUM DIMENSIONS FOR STRAIGHT UNRELIEVED FLANGES FOR WHEELS WITH THREADED INSERTS OR PROJECTING STUDS. ________________________________________________________ | | | B(1) - Minimum | A - Diameter of | outside diameter | T - Minimum wheel | of flange | thickness of flange ________________|__________________|_____________________ | | 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(1): Must be large enough to extend beyond the bushing. Where prong anchor or cupback bushing are used, this footnote does not apply.
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