Drawing on 20 years of experience of high technology, special surface treatment, and still developing...
For all your core pin needs... please contact us Dynamo, Inc.
Most important factor of core pins is smooth continuous line, especially where a radius meets a straight line. Highly developed, sophisticated ingenuity of Dynamo guarantees smoothness.
Water Cooling Hole
The hole is concentric to the O.D. within 0.03mm(0.012") This prolongs pin life by providing equal cooling in all directions.
To work on form pin pictures above, prepare two electrodes, finishing one for EDM with ±0.01mm(0.0004 inch) tolerance. After EDM, application of Magaria treatment takes off EDM scale, tough hard skin and leaves a metallurgical stableness necessary against erosion and deposit.