Polycrystalline Diamond (PCD) Router Bits
Excellent tool life in abrasive materials (up to 200 times longer than carbide), high initial cost, lower overall sharpening and maintenance cost, less machine downtime due to replacing dull tooling, brittle; excellent for long router bit runs in material where the router bit isn’t likely to break or get damaged prematurely. An automatic feed machine is necessary (eg. CNC Router) to prevent tool breakage, any sudden jerking motion can shatter the brittle PCD diamond. Limited profile selection, many times custom router bits.
Buyers Guide for Diamond Router Bits
Will Diamond Router bits work with the material I am running?
Is the material I am running free of foreign objects (eg. bullets, stones or nails that might be found in solid wood) that might break the diamond router bit prematurely?
For long router bit runs I will have lower overall sharpening cost, and less machine downtime, will this offset the higher initial cost of the diamond router bit?
Will the diamond router bit meet my finish requirements?
How fast do I want to feed the material, will the diamond router bit hold up to these feed speeds?