SAE Glossary

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NPM alloy
Non precious metal or precious metal free alloy. With the development of the SAE spark erosion procedure, it became possible in 1982, for the first time ever, to produce high-quality combined fixed/removable dentures made of precious metal free alloys and titanium without the need for soldered joints.

NPM CoCrMo alloy
Hard, precious metal free alloy made of cobalt-chrome-molybdenum (CoCrMo) such as the SAE Okta special alloys.
Free of nickel, gallium and beryllium.

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SAE Spark Erosion Procedure
The patented dental spark erosion procedure for the production of high-quality dentures with precision fit was introduced into dental technology for the first time ever in 1982 by master dental technician, Günter Rübeling, founder of SAE DENTAL. Up until this point, spark erosion procedures were only used in industry to process hard alloys and steel. With the development of the SAE spark erosion procedure, it became possible for the first time ever, to produce high-quality combined fixed/revmoable dentures made of precious metal free alloys (= NPM alloys such as cobal-chrome-molybdenum / CoCrMo) and titanium without soldered joints. A further, essential advantage of the SAE spark erosion procedure: by dispensing with expensive gold alloys, high-quality dentures can be produced with precision fit and extremely economically.

Spark Erosion, Dental
Also called SAE Spark Erosion Procedure.
See SAE Spark Erosion Procedure

Spark Erosion, Industrial 
Spark erosion, in terms of ISO 8580 and ISO 8590, belongs to the erosive manufacturing process by which associated terms are collated in the VDI guideline 3402-1. Spark erosion is used everywhere where other erosive processes, due to their machining application, cannot be used. The reasons are either the properties of the material - in particular the hardness of the material - or the contour that needs to be attained - inner corners or complicated indentations. Another advantage is that the spark erosion process causes very few machining forces and thus the workpiece is not subjected to any mechanical stresses. This in turn means that for production the desired dimensional accuracy can be attained using spark erosion without the need for subsequent manual follow-up work. Manual follow-up work is limited to improving surface characteristics and, e.g. manual polishing. Principally, direct injection die casts, pressure casting moulds and impression die forging are made using spark erosion. As such, the principle users of spark erosion are tool makers and mould design and construction companies.
(Source: http://erosion.de/Funkenerosion_EDM/Funkenerosion_EDM-Info.html).

See also SAE spark erosion procedure or dental spark erosion = utilization of the industrial spark erosion technology for dental technology by master dental technician Günter Rübeling, the founder of SAE DENTAL in 1982.