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Diehl Steel has introduced Ready-Block EDM Blanks for EDM applications. The ready-to-use blanks are pre-hardened, squared and ground at Diehl Steel, eliminating the need for customers to machine and heat-treat them prior to use. They are available in many popular tool steel grades including in-stock AISI A-2 and D-2 (58-62 HRC).
Each block is first precision machined to a specific thickness, width and length, within +.010"/.020" tolerance. They are then hardened and tempered to a standard hardness. A starter hole is included at the customer's request.
Related Glossary Terms
- electrical-discharge machining ( EDM)
electrical-discharge machining ( EDM)
Process that vaporizes conductive materials by controlled application of pulsed electrical current that flows between a workpiece and electrode (tool) in a dielectric fluid. Permits machining shapes to tight accuracies without the internal stresses conventional machining often generates. Useful in diemaking.
- hardness
hardness
Hardness is a measure of the resistance of a material to surface indentation or abrasion. There is no absolute scale for hardness. In order to express hardness quantitatively, each type of test has its own scale, which defines hardness. Indentation hardness obtained through static methods is measured by Brinell, Rockwell, Vickers and Knoop tests. Hardness without indentation is measured by a dynamic method, known as the Scleroscope test.
- tolerance
tolerance
Minimum and maximum amount a workpiece dimension is allowed to vary from a set standard and still be acceptable.
