New Jersey Diamond Products Co.

Cones and Phono Points

Cones and phono points are made from round elongated natural diamonds of only the finest quality. They are used to dress fine thin wheels that need to be accurately trued into irregular shapes. Standard cones and phono points are made by grinding an included angle of between 60 to 120 degrees on the diamond that is mounted in a straight shank. They can also be made to customer specifications with other angles and unlimited shank configurations.