eye sights are of aluminium alloy. The sight windows are glass and Buna N seals are used throughout. These valves are available in an angle or cross pattern, with a female inlet of ¼,] , or ½ inch pipe thread, and male outlets of ¼, J , ½, or ¾ inch. The maximum temperature permitted is 225 ° F. Oil-Rite Corporation, PO Box 747, Manitowoc, Wi 54220, USA
Removing tramp oil Tramp lubricating and hydraulic oils can impaii the efficiency of water based cutting fluids. Heat transfer capacity is reduced, giving an increase in temperature at the point of cutting to the detriment of cutting edge and the surface finish: exclusion of air encourages the growth of anaerobic bacteria.
19 - 22 June, 1978, Massachusetts,
Fundamentals of •bology An international Conference on Fundamentals of Tribology will be held at the Massachusetts Institute of Technology on 19-22 June, 1978. The purpose of this conference is to establish the state of fundamental knowledge in tribology and to assess the nature of the major problems to be solved through an assembly of experts in the field. Invited review papers on the limits of understanding will be given by: D. Scott (on overview); D.J. Whitehouse (surface topography and surface quality); A.S. Argon (role of physical properties); D. Buckley (role of chemical properties); R.M. Latanison (surface phenomena); E. Rabinowicz
7-
Curtagil have developed a portable, free-standing oil skimmer which mechanically removes unemulsified oil floating on the surface of water based coolants. An oleophilic plastic pick-up band driven by a low powered electric motor picks up the surface oil film and conveys it via a wiper blade to a waste container. According to Curtagil, oil removal rates vary according to tramp oil film thickness, viscosity, and the model of oil-skimmer used. They suggest, however, that generally one hour of operation will reduce to an acceptable level the tramp oil accumulated in an automatic machine during one week of normal runnong. Curtagil Ltd, Fishponds Road, Wokingham, Berkshire RG11 2QL, UK
USA
(fundamentals of friction); F.T. Barwell (wear mechanisms); I. Finnie (erosion); M.C. Shaw (wear in metals processing); D. Tabor and B. Briscoe (polymer wear); R.A. Burton (thermomechanical effects); V.C. Westcott (wear monitoring); M.B. Peterson (wear prevention); D. Godfrey (boundary and solid lubrication); and H.S. Cheng (elastohydrodynamic contact). Discussion papers on the general topics ,zovered by the review papers will also be presented. Professor N.P. Suh, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
10 April, 1977, Cardiff, UK
Surface treatments for protection The aim of this meeting is to review both the established and some of the more recent commercial surface treatment processes, that impart specific wear and/or corrosionoxidation resistance. The surface treatment processes will be considered in terms of the nature of protection provided, and it is hoped that significant interlinking between the tribological and corrosion aspects will develop. It is not intended to present new, basic research results, but rather to illustrate the technical and commercial importance of surface treatment processes, while also providing the opportunity of introducing the newcomer to the field, those involved in peripheral industries, or just interested parties to the great
technological and economic significance of surface protection treatments. There will be three keynote lectures on surface treatments for protection, oxidation and corrosion, and wear resistance. Supporting papers and case studies will be presented on: electrodeposition; hot dip coating processes; thermochemical treatments; chemical vapour deposition; high temperature coatings; ion implantation; lubricant protection; and plastic coatings.
The Meetings Secretary, The Institution of Metallurgists, Northway House, Whetstone, London N20 9LW, UK
Redrculating ballscrews BaUscrews can be used in a wide range of applications involving conversion of rotary to linear motion or vice versa. Typical applications include operating tables, printing machinery, steering gear, and conveyor pushers.
The SF rolled thread recirculating ballscrews are available in four nominal diameters from 8 - 1 6 mm and in threaded lengths from 600-2000 mm.
for mounting. According to SKF, theoretical efficiencies of over 90% can be achieved.
To complement its SC system of ballscrews and accessories, SKF (UK) Ltd has introduced a low cost SF range.
Recirculation of the balls is achieved using a tube in the outside diameter of the nut, which is externally threaded
Special Products Division, SKF (UK) Ltd, Sundon Park Road, Luton, Bedfordshire, UK
TRIBOLOGY international February 1978 77