1722 NTERNATIONAL STANDARD (TSO Rock drilling -- Extension drill-steel equipment for percussive long-hole drilling -- Reverse-buttress-threaded equipments 1 1/2 to 2 1/2 in (38 to 64 mm) Forage des roches -- Materiels pour forage percutant de longs trous - Equipements a filetage a butee inverse 1 1 /2 a2 1/2 in (38 a 64 mm) First edition - 1974-09-15 UDC 622.233.5 Ref. No. ISO 1722-1974 (E) Descriptors : mining, drilling equipment, percussion drilling. Not for Resale Price based on 6 pages FOREWORD ISO (the International Organization for Standardization) is a woridwide federation of national standards institutes (ISO Member Bodies). The work of developing International Standards is carried out through sO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set governmental and non-governmental, in liaison with isO, also take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the ISO Council. Prior to 1972, the results of the work of the Technical Committees were published as so Recommendations; these documents are now in the process of being transformed into International Standards. As part of this process, Technical Committee ISO/TC 82 has reviewed ISO Recommendation R 1722 and found it iSO Recommendation R 1722-1970. ISO Recommendation R 1722 2 was approved by the Member Bodies of the following countries : Hungary Australia Poland India Belgium South Africa, Rep. of Canada Iran Spain Czechoslovakia Israel Sweden Egypt, Arab Rep. of Italy Thailand Japan Turkey France Germany Netherlands United Kingdom Greece New Zealand Yugoslavia No Member Body expressed disapprovai of the Recommendation. The Member Body of the following country disapproved the transformation of ISO/R 1722 into an International Standard : Canada @ International Organization for Standardization, 1974 cense fromIHS Not for Resale INTERNATIONAL STANDARD Rock drilling - Extension drill-steel equipment for percussive long-hole drilling - Reverse-buttress-threaded equipments 1 1/2 to 2 1/2 in (38 to 64 mm) 1 SCOPE AND FIELD OF APPLICATION 3 LIST OF COMPONENTS This International Standard specifies the basic dimensions 1 1/2 in 1 3/4 in 2 1/4 in 2 1/2 in for reverse-buttress-threaded extension drill-steel equipment Equipment light light light tight for percussive long-hole drilling of the following nominal (38 mm) (45 mm) (57 mm) (64 mm) sizes : Thread diameter 1 1/2 in 1 3/4 in 2 1/4 in 2 1/2 in 1 1/2 in light (38 mm) 1 3/4 in light (45 mm) 1 1/4 in 11/2in 13/4 in 17/8in Size of drill-steel hexagonal I hexagonal hexagonal hexagonal in bar form 2 1/4 in light (52 mm) (32 mm) (38 mm) (45 mm) (48 mm) 2 1/2 in light (64 mm) mm Lengths of 3050 10 13050 extension rods 2 REFERENCE 3660 12 3660 3660 12 3660 12 (ctause 4) ISO 723, Rock drilling - Forged collared shanks and chuck 6095 20 6095 20 bushings. for hollow hexagonal drill-steels. See clause 5 Coupling sleeves mm in 64 2 1/2 70 23/4 Bit diameters 76 76 (four-wing bits) (clause 6) 89 31/2 89 1275 Reverse-buttress threads See clause 7 Hollow hexagonal bars for extension rods See clause 8 d without license from IHS Not for Resale