ISO/TC 28/SC 4/WG 16 - Classifications and specifications of Industrial gear oils, turbine oils and compressor oils

This document specifies the minimum requirements for mineral or synthetic based lubricants, as delivered, and intended for use in flooded rotary air compressors (vane and screw). This document can be read in conjunction with ISO 6743-3. NOTE For the purposes of this document, the term “% (m/m)” is used to represent the mass fraction of a material.

This document establishes a classification and specifies the minimum requirements for mineral or synthetic base stock-based greases for the categories CKG and CKL according to ISO 6743-6 intended for the lubrication of enclosed and open gear systems. This document does not cover the extreme cases of use in terms of temperature and extreme charges conditions. For use in exceptional conditions, suppliers and purchasers of lubricants are intended to mutually agree on the testing methods and the acceptability criteria of the products, not covered by this document. NOTE 1 This document can be read in conjunction with ISO 6743-6, ISO 6743-9[1], ISO 12924[3] and ISO 6743-99[2]. NOTE 2 For the purpose of this document, the terms “% (m/m)” and “% (V/V)” are used to represent respectively the mass fraction and the volume fraction of a material.

This document establishes an extended classification which includes sub-categories of environmentally acceptable lubricants and specifies the minimum requirements for mineral or synthetic based lubricants for the categories CKH, CKJ and CKM, according to ISO 6743-6, and their sub-categories of environmentally acceptable lubricants, intended for the lubrication of open and semi-enclosed gears. This document covers the lubricants applied in the open and semi-enclosed gear systems most currently encountered in the industry. It does not cover the extreme cases of use with regards to temperature and extreme charges conditions. NOTE 1 For use in exceptional conditions, suppliers and purchasers of lubricants can mutually agree on additional testing methods and acceptability criteria of the products. NOTE 2 This document can be read in conjunction with ISO 6743-6.

This document specifies the minimum requirements for mineral or synthetic based lubricants intended for use in all types of refrigerating compressors. NOTE This document can be read in conjunction with ISO 6743-3.

This document specifies the minimum requirements for mineral or synthetic based lubricants intended for use in reciprocating and drip feed rotary air compressors (vane compressors) with the compression chamber(s)/cylinders lubricated by direct lubricant injection. NOTE This document can be read in conjunction with ISO 6743-3[1].

ISO 6743-6:2018 establishes the detailed classification of fluids of Family C (gear systems) which belongs to class L (lubricants, industrial oils and related products). It can be read in conjunction with ISO 6743‑99. The classification in this document concerns lubricants for industrial gears and excludes lubricants for automotive gears.

ISO 12925-1:2018 establishes the specifications relative to family C (gears) for lubricants, industrial oils and related products of Class L (see ISO 6743‑6). This document deals only with lubricants for enclosed gear systems. Lubricants for open gears and greases for gears (enclosed or open) are not covered. ISO 12925-1:2018 can be read in conjunction with ISO 6743‑6. The following categories specified in ISO 6743‑6 are covered by this document: CKB, CKC, CKD, CKE, CKSMP, CKTG, CKES, CKPG, CKPR.