Specifications:
The document provides specifications for extra long centre drills made from High-Speed Steel (HSS) with an E standard. These drills are designed for various materials including aluminum, plastics, cast iron, stainless steel (INOX), titanium, and others. The drills are categorized based on the tensile strength of the material, with specific recommendations for materials with tensile strengths less than 900 N and greater than 900 N.

Procedures:
The document outlines the nominal diameter (⌀) and shank diameter for the drills, specifying the range of diameters suitable for different workpiece materials. It also provides feed rates (f) in mm/rev for different drill sizes, ensuring optimal performance based on the material's tensile strength.

Standards and Recommendations:
The drills conform to a standard similar to DIN 333-A, featuring a 60° angle, ground from solid, and relief ground. They are spiral fluted with an extra long shank, making them suitable for deep drilling applications.

Key Data from Tables:
The tables in the document list various drill sizes with corresponding feed rates and material compatibility. For example, a drill with a nominal diameter of 1 mm is recommended for materials with tensile strength less than 900 N, with a feed rate of 0.02 mm/rev. Larger drills, such as 3.15 mm, have a feed rate of 0.03 mm/rev.

Critical Information:
It is crucial to select the appropriate drill size and feed rate based on the material's tensile strength to ensure efficient drilling and prevent tool damage. The document emphasizes the importance of adhering to these specifications for optimal performance.