Innovative cutting and grinding oils

The new Gas-to-Liquid (GTL) cutting and grinding oils are from the latest generation of machining oils. In the GTL manufacturing process, natural gas is converted into an extremely pure, synthetic oil. This process ensures that the oil is free from organic nitrogen, heavy metals, zinc and chlorine compounds.

The resulting GTL products form the OEMETOL GT range of oils. They are characterised by a very high flash point and low emissions. These qualities ensure good occupational safety, and lower consumption. Compared to conventional mineral or hydrocracked oils, the higher lubricating performance and low foaming behaviour of the GTL oils, reduce wear and improve process reliability.

Approvals from a diverse range of well-known customers within the automotive and machine tool industries confirm the process safety of Oemeta’s GT neat oils.

GTL manufacturing process

During the GTL process, natural gas and oxygen are mixed to form syngas, which is used in the Fischer-Tropsch synthesisto create long-chained paraffin waxes. In the next step (Hydrocracking) these long-chained paraffin waxes are converted into liquid hydrocarbons (saturated short-chained paraffins) by cracking, isomerisation and fractionation.

Benefits of GT oils at a glance

  • Odourless
  • Very low evaporation loss
  • Low-foaming and outstanding air separation characteristics
  • Improved filterability and efficiency due to low density
  • Not cytotoxic (EN ISO 10993-5:2009)
  • Outstanding lubricating performance due to selected EP- and AW-additives

The GTL cutting and grinding oils compared to conventional hydrocracked oils


In accordance with EN ISO 10993-5:2009 our GTL oils arenon-cytotoxic. An essential precondition for the useof implants in the medical sector is a good biocompatibility.Therefore, biocompatible materials as well as processingmedia are ideally used.

In order to prove biocompatibility in line with ISO 10993-5, thein-vitro cytotoxity test has to be performed. This test looks atthe influence of the processing fluid on the viability of thebody cells. If the viability amounts to more than 70 percent ofthe cells at the end of the test, the processing fluid iscategorised as non-cytotoxic.

During the test, a stainless steel plate of 25 square centimetresis immersed in the processing medium. The liquid is then leftto drip off for one hour. After sterilization, the plate is placed ina defined cell solution for 48 hours. Microscopic counting anddetermination of the metabolic activity finally establish theviability of the cells.

To optimise the quality of products for the medical sectorduring production, the use of non-cytotoxic cooling liquidstested in line with ISO 10993-5 is recommended.

GT Products


  • Viscosity at 40 °C: 11 mm2/s
  • Recommended for grinding and CBN-grinding


  • Viscosity at 40 °C: 15 mm2/s
  • Recommended for standard machining (all-rounder), turning, milling, drilling and grinding


  • Viscosity at 40 °C: 22 mm2/s
  • No labelling according to GHS/ CLP
  • Recommended for turning, milling and drilling