BS ISO 2725-3:2001 pdf – Assembly tools for screws and nuts — Square drive sockets — Part 3: Machine-operated sockets (“non-impact”) — Dimensions.
1 Scope This part of ISO 2725 specifies dimensions, designation and marking of machine operated “non-impact” square drive sockets. NOTE 1 Machine operated “non-impact” square drive sockets are listed under number 301 in ISO 1 703:1 983. NOTE 2 Hand-operated sockets are dealt with in ISO 2725-1. Machine-operated “impact” sockets are dealt with in ISO 2725-2. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 2725. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 2725 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 691 , Assemblytools forscrews andnuts — Wrench andsocketopenings — Tolerances forgeneraluse. ISO 1 1 74-2, Assembly tools for screws and nuts — Driving squares — Part2: Driving squares for power socket tools. 3 Tolerances on width across flats Tolerances on width across flats, s, shall be in conformity with the tolerances for socket openings given in ISO 691 . Manufacturers are free to choose the series of deviations. 4 Dimensions See Figures 1 to 3 and Tables 1 to 5. NOTE Figures 1 to 3 are given only as examples. They are not intended to influence the manufacturer’s design. The driving squares are in conformity with ISO 1 1 74-2. Tables 1 to 3 give the dimensions of sockets for driving squares of 6,3, 1 0 and 1 2,5 (according to ISO 1 1 74-2). Table 4 gives the dimensions of the retaining pin. Table 5 gives the dimensions of the retaining ring. During use, the socket shall be maintained by a retaining ring and pin (type G) or by a plunger retainer (type J). Retaining systems G and J can be used for all types.5 Designation A machine-operated, non-impact square drive socket, conforming to this part of ISO 2725 shall be designated by a) “Hex non-impact socket” or “Bihex non-impact socket” according to the insert; b) reference to this part of ISO 2725, i.e. ISO 2725-3; c) dimensions of the square drive in millimetres; d) width across the flats, in millimetres. EXAMPLE A double hexagon (bihex) machine-operated square drive socket “non-impact” with 1 2,5 mm square drive size and with width across flats of 1 0 mm is designated as follows: Bihex non-impact socket ISO 2725-3 – 12,5 ? ? 10 6 Marking The machine operated square drive non-impact socket shall be marked, permanently and legibly, with at least the following: a) the value of the dimension across the flats; b) the name or trade mark of the manufacturer (or responsible supplier); c) the indication “NON-IMPACT” (in block capitals).