ISO 1721:1974
Rock drilling — Extension drill-steel equipment for percussive long-hole drilling — Reverse-buttress-threaded equipments 1 1/16 and 1 1/4 in (27 and 32 mm)
| Fecha edición: |
1974-08-01
En Vigor
|
|---|---|
| Idiomas disponibles: | Inglés, Francés |
| Resumen: | Specifies the basic dimensions for equipment. Gives a list of components; tabulates together with figures: shank adapters for central flushing, hexagon type and lug-shank type; extension rods; coupling sleeves; four-wing bits; reverse-buttress threads; hollow hexagonal bars for extension rods; hexagonal drill-steels. |
| ICS: | 73.100.30 - Equipo de perforación y excavación |
| CTN: | ISO/TC 82 - 50164 |
|
Equivalencia Internacional |
Idéntica UNE 22664:1985 |










