|Stainless steel balls, ball-cones, satellites steel media used for burnishing|
Quality: The lustre attained during the burnishing process depends largely on the quality of the stainless steel balls. The balls used are spherical and are polished, lapped and passivated. Process specifications, most of the times, require completely non magnetic balls.
Steel: Generally AISI 304 stainless steel balls are used. For higher burnishing requirements, AISI 316 steel balls are preferred.
Size and Shape: Depending upon the size of the coin blanks, ball diameters ranging from 2 mm to 6 mm (5/64" to 15/64 inch size) are suitable. A mixture of sizes is also used. Generally, 3x5 mm size ballcones or satellites are mixed with the spherical balls to polish the edges and engravings, if any. For trial runs, eclipse balls are used for cost savings.
Techbuff stainless steel media offered by Technocon Engineers, India is the preferred choice of many coin blanks makers and mints worldwide because of its excellent quality and very competitive prices.