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ANSI B7.1: Safety Code for the Use, Care, and Protection ...

By Authority OfTHE UNITED STATES OF AMERICAL egally Binding DocumentBy the Authority Vested By Part 5 of the United States code 552(a) and Part 1 of the code of Regulations 51 the attached document has been duly INCORPORATED BY REFERENCE and shall be considered legally binding upon all citizens and residents of the United States of America. HEED THIS NOTICE: Criminal penalties may apply for noncompliance. Official Incorporator:THE EXECUTIVE DIRECTOROFFICE OF THE FEDERAL REGISTERWASHINGTON, Name: CFR Section(s): Date of Action: eANSI : Safety code for the use , care , and Protection of Abrasive CFR , (c) and (d)44 FR 8577, Feb. 9, 1979; 44 FR 20940, Apr. 6, 1979 SUPERSEDED -= ~= Reproduced By GLOBAL J ~~ ENGINEE'lt'ING OOCUMENTS ~WithThePennissionO'ANSI Safety code for -=--Under Royalty Agreement the use , care , and Protection of abras'ive wheels ( American national Standard An American national Standard implies a consensus of those substan-tially concerned with ita scope and provisions.)

(This Foreword is nat a part of the American National Standard Safety Code ... as the ""American Standard Safety Code For the Use, Care and Protection of Abrasive Wheels." The Code has been revised in 1930, 1935, 1943, 1947. 1956, 1964 and 1970. ... Safety is indeed everybody's business in the "Use, Care and Protection of Abrasive Wheels."

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Transcription of ANSI B7.1: Safety Code for the Use, Care, and Protection ...

1 By Authority OfTHE UNITED STATES OF AMERICAL egally Binding DocumentBy the Authority Vested By Part 5 of the United States code 552(a) and Part 1 of the code of Regulations 51 the attached document has been duly INCORPORATED BY REFERENCE and shall be considered legally binding upon all citizens and residents of the United States of America. HEED THIS NOTICE: Criminal penalties may apply for noncompliance. Official Incorporator:THE EXECUTIVE DIRECTOROFFICE OF THE FEDERAL REGISTERWASHINGTON, Name: CFR Section(s): Date of Action: eANSI : Safety code for the use , care , and Protection of Abrasive CFR , (c) and (d)44 FR 8577, Feb. 9, 1979; 44 FR 20940, Apr. 6, 1979 SUPERSEDED -= ~= Reproduced By GLOBAL J ~~ ENGINEE'lt'ING OOCUMENTS ~WithThePennissionO'ANSI Safety code for -=--Under Royalty Agreement the use , care , and Protection of abras'ive wheels ( American national Standard An American national Standard implies a consensus of those substan-tially concerned with ita scope and provisions.)

2 An. American national ~.Ql& quot ;& quot ;'.,o;.~;8& quot ;Gj,'C':~~:) Standard fa intended as a guide to aid the manufacturer, the coDsumer,'t~J'~t:~tci:r.:::.& quot ;~ ~f&;4J. and the general public. The existence of an American national Standard does not in any respect preclude anyone, whether.:he has approved the standard or not, from manufacturing, marketing,: purchasing, or using products, processes, or procedures not conforming to the standard. Amer-ican national standards are subject to periodic review and users are cau-tioned to obtain the latest editions. CAUTION NOTICE: This American national Standard may be revised or withdrawn at any time. The proc~dures of the American national standards Institute require that action be taken to reaffirm, revise, or with-draw this standard no later than five years from the date of publication.

3 Purchasers of American national standards may receive current infor-mation on aU standards by calling or writing the American national standards Institute. DATES OF PREVIOUS REVISIONS Origiull~ unud eM G TfttGtiv. AIMT' SeaNlGnl ill 1111. Bniled GU unC ell GK sea,..& quot ;, .. 1111 . '& quot ; 1110, lUI, IIU, 1'''.& quot ; IIU. 116& quot ; oM 1170. & quot ;. & quot ; Cop1ria'ht 1970 by the American national standards Insti~te, ' 2831 c CONTENTS SECTION I-SCOPE AND DEFINITIONS Page U Scope .. 1 DeftnltlODI .. ,.. Shall and Should .. Abrasive Wheel .. Organic Bonded Wheels .. ' Inorganic Bonded Wheels .. Reinforced Wheels .. Grinding Surface or Face .. Safety Guard .. Wheel Speed .. Revolutions Per Minute .. Surface Feet Per Minute .. Flanges.

4 , .. & quot ; .. Steel Rings .. , .. Threaded Bushings . , .. Reducing Bushings .. Tape or Wire Winding .. Chuck .. , .. The Wheel Manufacturer .. The Machine Builder .. The User of Wheels and Machines .. Usage Definitions .. Centerless Grinding .. Coping .. Cutting Off .. Cylindrical Grinding .. Internal Grinding .. Off-Hand Grinding .. Portable Grinding .. Precision Grinding .. , .. , .. Saw Gumming .. Slotting .. Snaggin&' .. Surfsce Grinding .. Tool Grinding .. Tuck Pointing .. 1 1 1 1 1 2 2 2 3 t S 3 3 4 4 4 4 1 6 5 5 5 6 6 6 6 6 6 7 7 7 7 7 7 Definitions and LimitatioJU! of Wheel Shapes .. 7 Type 1 Straight Wheels .. 8 Type 2 Cylinder 8 Abrasive Disc Wheels.

5 8 Type 4 Taper Sided Wheels .. ,.. 8 Type 5 R~cells(!d One Side Whl'elll .. 9 Type 6 Straight Cup Wheels .. 9 Type 7 Double Recessed Wheels .. ,.. 9 Type 11 Flaring Cup Wheels .. 10 Type 12 Dish Wheels .. 10 Type 13 Saucer Wheels .. 10 Types 16, 17, 18, 18R and 19 Cone and Plug Wheels .. 11 Types 20, ,23, ,26 Relieved and/or Recessed Wheels .. 12 Types 27 and 28 Dellressed Center Wheels .. 13 Type 27A Depreslled Center Wheel!' .. 13 Cutting Off Wheels .. 14 Copinl1: Wheels .. ,.. 14 Tuck Pointing Wheels .. 1-4 Mounted Wheels .. 15 Threaded Hole Cup Wheels .. ,.. 15 Modified Types 6 &: 11 Wheels (Terrazzo) .. 15 SECTION 2-BANDLING, STORAGE AND INSPECTION Handling .. 16 Storage.. 16 Inspection .. , .. '& quot ;.)

6 18 SECTION 3-GENERAL MACmNE CONDITIONS Z8lZ Machine DesiJrll and Maintenance .. 20 Safety Guards .. 20 Power .. 20 Ezhallst Provision .. 20 Diameter of Spindle .. 21 Flanlrt!& quot ; . & quot ;& quot ;.& quot ;& quot ;& quot ; .. ,,& quot ;,, .. ,,& quot ;& quot ;& quot ;& quot ;& quot ;& quot ;& quot ;& quot ;& quot ;& quot ;& quot ;& quot ;& quot ;& quot ;& quot ; 21 Work Rests .. 21 Llmltins: Wheel Diameter .. 21 Direction of Machine Spindlf! Thread .. 23 Lenath of Machine Spindle Thread .. 23 , A-l J CONTENTS (Continued) Page Size of SphuDe or Kount .. 24 Threaded Hole Wheels .. 24 Mounting of Abrasive Discs (Inserted Nut, Inserted Washer and Projecting Stud Type) .. 25 Mount1~ of Plate Mounted Type Wheels .. ~ .. -26 SECTION 4- Safety GUARDS u General Requirements .. 2& quot ;1 Cup Wheel.. 27 Guard Exposure .. 28 Bench and Floor Stands .. 28 Cylindrical Grinders.

7 '.' .. 29 Surface Grinders and Cutting-off Machines .. '.' .. 29 Swing Frame Grinders .. 29 Automatic Snagging Machines .. 30 Top Grinding .. '.. 30 Portable Grinders .. 30 ' ~ght. Angle Head 01' Verticle Portable Grlndem-Type 27 and 28 SO ' Other Portable Grinders . ,.. 30 Ezposure Adjustment .. 31 Enclosure Requirement .. 32 Safety Guard .. ~.. 32 Additional Enclosure .. Material Requirements and Minimum Dimensions .. 33 For Speeds Up to 8,000 .. 33 For Speeds Up to 16,000 .. 33 Optional Materials .. 33 Exception!!.. 33 Material Specifications .. 34 Construction Guide for Fabricated Guards .. 34 SpecUications for Rivets, Bolts, Welds and Studs for Fabricated 34 ConsUuction Guide for Drawn Steel Guards.

8 -.. 37 Band Type Guarda--General Specifications .. 40 Construction Guide for Band Type Guards .. 40 SECTION li-FLANGES General Requirements .. 42 'rype 1 Cuttinp:-Off Wheels .. 42 TyPe 27A Cutting-Off Wheels.. 42 Flange Types .. 43 Design and Material .. 43 Finish and Balance .. 43 Unifonnity of Diameter .. ,.. 43 Receas and Undercut .. 44 Contac:t.. 44 5.'1 Drivlnc Flange .. 45 5.' Flanges, Multiple Wheel Mounting .. 45 .. 45 Straight Flanges, Relieved and Unrelieved .. 45 Straight Adaptor Flanges Heavy Duty Grinding .. 45 &. Sleeve Flanp:es .. 46 &.9 Repairs and Kaintenance .. 46 SECTION 6-KOUNTING Inspection .. & quot ; .. & quot ; .. & quot ; .. & quot ;& quot ; .. & quot ; .. , .. & quot ; .. & quot ;& quot ;& quot ;& quot ; .. & quot ;& quot ; .. & quot ;& quot ;,, .. ,, & quot ;& quot ; .. & quot ; .. & quot ;& quot ;,, 52 Arbor Size .. i.. 52 Surface Condition.

9 52 Bushlnc .. 52 Blotten .& quot ; & quot ;& quot ; f. & quot ; & quot ; & quot ; & quot ; & quot ; & quot ; & quot ; & quot ; & quot ; & quot ; & quot ; .. & quot ; & quot ; & quot ; .. & quot ; & quot ; & quot ; & quot ; .. & quot ; .. & quot ; .. & quot ; .. & quot ; & quot ; .. , .. & quot ; .. & quot ; & quot ; & quot ; .. & quot ; & quot ; .. & quot ; .. 153 FIanca .. 53 8.'1 Mult1ple Wheel J(oantlnr .. 53 ii 2833 A-ll o C) CONTENTS (Continued) Page Tightening of the Mountin,r Nut .. Sinll'le End Nut .. Multiple Screws .. Direction and Length of Thread on Machine Spindle .. Threaded Bole Wheels .. 54 -54 64 54 54 Mountinr of Abrasiore Dises (Inserted Nut, Inserted Wuher and Projecting Stud Type) .. 55 Mountin,r of Plate Mounted Type Wheels .. 55 Safety Guards .. 55 Mounted Wheels .. 55 Type 27 and Type 28 Wheels .. :.. 56 Type 27 A Wheels .. 56 Type 2 Cylinder Wheels .. 57 Segments .. 57 SECTION '7-SPEEDS ' Standard Speeds .. 58 ' Standard Maximum Speeds.

10 68 ' Machine Builder's Responsibility .. 68 Wheel User's .. 68 ( Wheel Manufacturer's .. 60 Speed Check of Machines-User's Responsibility .. 61 Speed Adjustment Control-User's Responsibility .. 61 SECTION B-SPECIAL SPEEDS Introduction .. & quot ; .. 62 Requirements for Special Speeds .. ; .. ~ .. 62. Condition A-The Wheel Manufacturer .. 62 Condition B-The Machine Builder .. 0 63 Condition C-The User .. 63 Wheel Manufacturer'. Responsibility .. 0 0 6::\ Manufacturer'. Test .. 0 63 Identification .. & quot ;.. 63 Machine Builder's Responsibility.)


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