PrioBioKSS - Precision machining with biogenic jatropha oil as cutting fluid

Project description

The production program of small and medium-sized companies in the metalworking industry is often linked to customized and complex requirements. Examples are the machining of difficult to machine materials (tungsten carbide, titanium, special alloys, etc.) or the precision machining in small or medium series production.

In order to maintain the required quality characteristics of the workpieces (surface roughness, accuracy) cutting fluids are needed for lubrication and cooling. Most of the conventional cutting fluids used today are water or non-water miscible fluids based on the finite resource mineral oil. The procurement, maintenance and disposal of such fluids are connected with significant costs. Therefore, the cost situation and competitiveness of the cutting fluid user and producer is exacerbated by the unfavourable price development of the mineral oil and due to the cost for safety measures when handling insalubrious and environmentally hazardous substances.

Aim of the research project PrioBioKSS is therefore the development of an alternative non-water miscible mineral oil free cutting fluid on the basis of vegetable oil for the precision machining of difficult to machine materials with geometrically defined and undefined cutting edge.

Cutting fluid application during external cylindrical grinding
Source: Institut für Werkzeugmaschinen und Fertigungstechnik, TU Braunschweig

The raw material of the new cutting fluid is jatropha oil. This vegetable oil is not suitable for use in food and fodder production and also does not compete with food and fodder production in terms of land and usage.  By controlled adjustment of the viscosity and by the use of additives the jatropha oil is enhanced for the precision machining of difficult to machine materials. This development process takes place in a business overarching approach by involving experienced partners in the field of cutting fluid production, filtration, application and disposal.

Research focus of the IWF is the technical, economic and environmental assessment. For this purpose, the non-water miscible cutting fluid is tested on a pilot scale in the context of filtration experiments and machining experiments with a geometrically defined and undefined edge. Furthermore, the IWF accompanies the industrial application partners in the testing of the novel cutting fluid.

Project partners

  • DAW Schmierungstechnik GmbH
  • TRANSOR Filter GmbH
  • A. Leistner Werkzeugtechnik GmbH + Co. KG
  • CPT Präzisionstechnik GmbH
  • Fraunhofer-Institut für Verfahrenstechnik und Verpackung

Keywords: Cutting fluid; Jatropha oil; Mineral oil free factory


2013 until 2015


Sebastian Thiede


Federal Ministry of Education and Research (BMBF)
Project Management Karlsruhe (PTKA)

  last changed 24.08.2016
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