Diamond and boron nitride tools - joke Technology GmbH - #5

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302 3 Tel. +49 (0) 22 04 / 8 39-0 • Fax +49 (0) 22 04 / 8 39-61 • info@joke.de 3. Diamond and boron nitride tools For service beyond the call of duty. �¡ You have an aim, but not yet a solution. • We can develop the complete tool on your behalf - from the design/drafting stage, including manufacture of the blank, to coating. �¡ You already know your requirements, but are still not aware of the best possible, most economical solution. • You provide us with your drawing (or even just a sketch) and we will deal with the rest, right down to the ready-to-use tool. �¡ You already have a blank of the tool, or even a worn tool. • We will rework the tool on your behalf and apply the necessary coating. Notes on manufacture of the carriers (blanks) Material: Blanks should preferably be made of low alloyed or unalloyed chromium-free steels, e.g. C 60, C 45, ST 37, which guarantees optimum bonding between the galvanic layer and blank. Prerequisite: fine turning, milling or grinding are adequate machining operations for surfaces to be coated. It is important that all rotating tools are manufactured with optimum radial run-out, since generally, the tools can no longer be dressed after coating. Selection of the grit size: It is advisable to select the grit size as coarse as the desired surface quality allows. We recommend 126 as a medium grit for general grinding of metals and hard materials. Grits >356 should preferably not be used. Coarser diamond grits in the range of D181 to D 602 can be used in plastic and rubber finishing. Fine and extremely fine grits can be used for special applications. Recoating of worn tools Tools with galvanic bonding, like any other tools, are subject to natural wear and tear. Since the immobilisation time of a tool considerably affects the productivity of the working process and the price of the product to be manufactured, extending tool service life is a decisive factor. This is why our tools can be recoated several times. This is of value primarily when on the one hand, the proportion of expenditure for design and/or manufacture of the carrier has incurred a considerable percentage of the costs or when appropriately high numbers of the same tools exist. The prerequisite in this case is merely that the carrier remains free of defects in terms of true running and geometrical shape. Dressing of a damaged carrier after the coating is lost is worthwhile only in exceptional cases, since in most cases, the requisite expenditure for repairs approximates that of a newly manufactured product. Coating thickness For a tolerated dimension in the coated area, account must be taken of the coating thickness when manufacturing the blank. Please contact our Product Manager Stefan Spiegel on all issues regarding (special) diamond tools: Tel. +49 (0) 22 04 / 8 39-0 s.spiegel@joke.de Diamant- und CBN Special tools