BS ISO 3316:2018 pdf free

BS ISO 3316:2018 pdf free.Assembly tools for screws and nuts – Attachments for hand-operated square drive socket wrenches
Place the tool in an internal test square and apply the corresponding torque.
Smoothly apply an increasing load until the minimum testing torque (see Table 1) is reached.
The across-flats dimension of the internal test square shall be equal to the minimum dimension of the corresponding internal square (see ISO 1174-1) with a tolerance of H8; the internal test square shall be hardened to a hardness of not less than 55 HRC.
A device in which the internal test square can be rotated at a certain torque, determined with an accuracy of +2,5 %, may also be used for this test.
Following the application of the minimum test torsion torque, no damage or deformation shall affect the usability of the tool.
Test of adaptor socket wrench and extension bar as universal joint, square drive
The torque shall be achieved by applying a load using a driving part, the square drive of which has been treated for a minimum hardness of 55 HRC and whose across-flats dimension is equal to the maximum dimension of the corresponding male square (see ISO 1174-1) with a tolerance of h8.
The universal joint shall be tested in the position in which the two squares are on the same axis.
An attachment for hand-operated square drive socket wrenches in accordance with this International Standard shall be designated by
a) an abbreviated description/ descriptor as shown in Table 1;
b) a reference to this document, i.e. ISO 3316;
c) the dimension of the internal square drive and the external square drive, in millimetres, for the adaptor; or
d) the dimension of the square drive, in millimetres, and the overall length, I, in millimetres, for the extension bar; or
e) the dimension of the square drive, in millimetres, for the universal joint.
EXAMPLE 1 An adaptor socket wrench 5 1 00 03 0 with a nominal dimension of 10 mm, an internal square drive and a 6,3 mm external square drive is designated as follows:
EXAMPLE 2 An extension bar5 1 00 04 0and51 00 04 1 with a nominal dimension of 10 mm, a square drive and an overall length I= 125 mm is designated as follows BS ISO 3316 pdf download.