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BS EN 14399-10:2018 pdf free

BS EN 14399-10:2018 pdf free.High-strength structural bolting assemblies for preloading Part 10: System HRC – Bolt and nut assemblies with calibrated preload.
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 14399-1, High-strength structural bolting assemblies for preloading — Part 1: General requirements
EN 14399-2:2015, High-strength structural bolting assemblies for preloading — Part 2: Suitability for preloading
EN 14399-3, High -strength structural bolting assemblies for preloading — Part 3: System HR — Hexagon bolt and nut assemblies
EN 14399-5, High-strength structural bolting assemblies for preloading — PartS: Plain washers EN 14399-6, High-strength structural bolting assemblies for preloading — Part 6: Plain chamfered washers
EN 26157-1, Fasteners — Surface discontinuities — Part 1: Bolts, screws and studs for general requirements (ISO 6157-1)
EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread (ISO 898-1)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 shear wrench non-impacting electric or manual tool, equipped with two co-axial sockets which react by torque one against the other:
— the outer socket which engages the nut rotating clockwise;
— the inner socket which engages the spline-end of the bolt (i.e. bi-hexagonal) rotating anticlockwise;
Note I to entry: The shear wrench operates as follows:
— during the tightening operation of an assembly, the socket in rotation is the one that finds the least resistance to it;
— from the outset and right up to the final tightening stage, the outer socket on the nut rotates clockwise while the inner socket holds the spline-end without rotating, the result being that the bolt assembly is progressively tightened by the increasing torque applied to the nut;
— at the final stage of tightening, i.e. when the torsional resistance plateau of the break-neck section is attained, the inner socket rotates anticlockwise while the outer socket on the nut provides the reaction without rotating;
— the bolt assembly installation is complete when the spline-end shears oil at the break-neck section.BS EN 14399-10 pdf free download.

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