High Performance DP End Mills - China Suppliers & Factory for 2 and 4 Flute Options

What types of workpieces are these DP series end mills best suited for?

According to the workpiece table, these end mills show excellent (◎) performance on Carbon steel, Alloy steel, Pre-hardened/Hardened steel up to ~55HRC, and Cast iron/Nodular cast iron. They also show good (○) performance on Stainless steel.

What geometries are available in the derek DP end mill lineup?

The derek DP lineup features three primary geometries: Square end mills (for flat bottom milling and slotting), Ball nose end mills (for 3D profiling and contoured surfaces), and Corner Radius end mills (for adding strength to corners and minimizing chipping).

What is the difference between standard and long (EL/BL) models?

Standard models (like DP-2-E, DP-4-E, and DP-2-B) feature standard overall lengths (L) and cut lengths (H). Long models designated by the "L" suffix (like DP-2-EL, DP-4-EL, DP-2-BL) offer extended overall lengths and cut lengths, making them ideal for deep cavity milling and long-reach applications.

How do I choose between 2 flutes and 4 flutes for my milling operation?

2-flute end mills (such as DP-2-E and DP-2-EL) provide larger chip pockets, which are highly recommended for slotting, heavy roughing, and efficient chip evacuation. 4-flute end mills (such as DP-4-E and DP-4-EL) offer higher core strength and are optimized for peripheral milling, semi-finishing, and finishing operations requiring a superior surface finish.

Are these tools suitable for processing high-hardness materials above 60HRC?

Based on the specifications, these end mills are rated as excellent (◎) for hardened steels up to ~55HRC. However, they are not rated for hardened steels reaching ~68HRC, meaning they are optimized for light-to-medium hardened materials.