Guide For Machining Blanks With Radius

For example, the female radius in the steel blank must be larger than the finished diamond plated size and so naturally a male radius must be smaller. Just how much larger or smaller the radius must be depends on the diamond grit (mesh) size selected. Based on the required grit size and the specifications on the form we can determine the manufacturing feasibility of your electroplated diamond tool.

  • Female radius on the steel blank must be larger than the finished size required

Example: If a 0.250" female radius is needed with 100/120 Grit.- How much larger than the finished radius should the tool radius be? 100/120=0.0075", therefore 0.250" + 0.0075=0.2575

  • Male radius on the steel blank must be smaller than the finished size required
Example: If a 0.250" male radius is needed with 100/120 Grit.- How much smaller than the finished radius should the tool radius be? 100/120=0.0075", therefore 0.250" - 0.0075=0.2425

Recommended Steel Blank Materials

Blank material hardness should be about 50 to 60 on Rockwell scale of hardness. Diamonds usually provide best adhesion to materials with high carbon content. High speed steels such as 4130, 4140 usually used for most blanks to be electroplated with diamonds. Steel used should have no lead content.