Dielectrics IME 63, IME 82, IME 110, IME 126

IME dielectrics are synthetic products manufactured in a catalytic process and posessing greatest disruptive strength. They are clear fluids and are almost odourless. They do not change colour during erosion. They have the same purity as pharmaceutical white oil and contain only a few traces of aromatics. There is no toxic or allergic reaction to contact with human skin or eyes, when IME products are used.

The Institute for Research and Material Testing of the State of Baden-Württemberg has tested this brand of dielectrics i.r.o. operational safety and industrial hygiene. A tolerance limit for workroom air (according to German regulations for the maximum concentration of chemical substances at places of work) is not reached.

IME dielectrics have been subjected to extensive tests and have proven themselves in practice for decades. They are explicitly recommended by the leading manufacturers of spark erosion machines.

Dielectric IME 63 is an extremely thin-bodied dielectric with the least possible surface tension. It is particularly suitable for very fine work, when a very low overcut is required, e.g. the microboring of spinnerets and the manufacture of microelectronic parts.

Dielectric IME 82 combines high metal removal with low electrode wear, which makes it suitable for general use in manufacturing tools and moulds. Even rough cut operations using an electric current of 600 amps can be carried out with IME 82.


Dielectric IME 110 is always used when a flash point of over 100° C is required for safety reasons, while much finishing work also has to be done. Dielectric IME 110 lies outside danger class A III.

Dielectric IME 126 is a dielectric for very high metal removal in rough cut operations, such as in the manufacture of forging dies. It can only be used for finishing if the best possible flushing conditions are ensured.

Testing the various IME dielectrics
IME dielectrics have been tested in practice both for metal removal and for electrode wear. The following materials and operational steps were selected for these tests:

a) Materials



1) electrolyte copper

tool steel X 210 Cr 12

2) graphite (Ellor 9)

tool steel X 210 Cr 12

b) Operational steps

The control settings given represent easy to manage operational steps involving no special difficulties. Metal removal and electrode wear were determined by measuring weight differences, which were then converted into units of volume.

Rough cut
When working with copper and steel, metal removal was lowest for IME 63 during rough cut operations, and highest for IME 126. Electrode wear was least for IME 63 and most for IME 126. When working with graphite/steel similar results were obtained. Metal removal was highest for IME 126 and least for IME 63.

It was astonishing that no measurable electrode wear took place when IME 110 was used.

Roughening n 12 Tr./200 μ sec

When working with copper and steel in the finishing process, IME 126 achieved the highest metal removal. Least electrode wear took place when IME 63 was used. When working with graphite and steel, IME 126 also achieved highest metal removal. The results of IME 82 were only slightly lower.

All these test results are valid only for the given control settings and materials. They are intended to show the varying influence of the dielectric used on the work process. The excellent results of IME 126 during finishing can undoubtedly not be achieved, unless flushing conditions are optimal.

Finishing nnn 2 Tr./10 μ sec



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