BS ISO 20168:2016 pdf free.Resistance welding – – Locking tapers for electrode holders and electrode caps.
BS ISO 20168 This document specifies the dimensions and tolerances for electrode holders and of spot welding electrode caps, where a locking taper is used.
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5182, Resistance welding一Materials for electrodes and ancillary equipment ISO 5821, Resistance welding一Spot welding electrode caps
Terms and definitions For the purposes of this document, the terms and definitions given in ISO 17677-1 and the following apply.
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locking taper taper allowing for a tight fit between an electrode holder and the electrode cap as their taper angles differ by 0° 2′ 60″, ensuring the electrode cap engagement point is at the skirt of the cap and electrode holder Note 1 to entry: See Figure 1.Note 2 to entry: Traditionally called“Fisher taper”. Note 3 to entry: During welding, the electrode cap tightens further on the electrode holder.
Electrode holders shall be designated in accordance with this document and nominal diameter, d1. EXAMPLE
A spot welding electrode holder, with nominal diameter 20 mm is designated as fllows:
ISO 20168:2016- 20 !
Electrode caps shall be designated in accordance with ISO 5821, except the number of this document shall be used to indicate that the cap has a locking taper.
The materials used shall be in accordance with ISO 5182.
The packaging shall be marked with the full designation and material used.BS ISO 20168 pdf download.