Counter sinking: Counter sinking is the operation of making a cone shaped enlargement at the end of a hole to provide recess for a flat head screw or a countersunk rivet. The counter-sunks (tools used for counter sinking) carry included angles of 60°, 82° or 90° and the cutting edges of the tool are formed at the conical surface.

Helical Solutions manufactures some of the best carbide end mills in the business. Join along as we tour their Maine Factory where they grind, inspect, and apply end mill coatings!

01:00 – Grinding Helical End Mills 28:30 – Inspection Department 32:40 – Setting Up Grinding Wheels 35:00 – Coating Department 42:00 – Laser Marking 43:18 – Test Cuts 50:00 – Order Fulfillment