BALL-NOSED END MILL_S213

General Information

• Manufacturer: DORMER PRAMET – part of the Dormer solid carbide end mill programme
• Dimensions according to the Dormer Pramet standard
• Primary use: copy milling of contoured surfaces and cutting internal part radii
• Recommended workpiece groups: ISO P, ISO M and ISO K
• Pack quantity: 1 piece

Usage Guidance and Cautions

• Select cutting speed and feed per tooth from the Dormer Pramet application material group (AMG) tables or the manufacturer machining calculator for the workpiece material being cut.
• The effective cutting speed of a ball nose varies with depth of cut and falls towards zero at the tip; where possible, tilt the tool or the workpiece so that the centre of the ball is not doing the cutting.
• Hold the shank in a rigid, accurate holder such as a collet chuck or shrink-fit chuck, and keep the overhang as short as possible to reduce runout and vibration.
• Carbide is very hard but brittle; avoid impacts and excessive deflection, and always wear eye protection when machining.
• Tungsten carbide contains cobalt; avoid inhaling dust when regrinding the tool.

Overview

The DORMER PRAMET S213 is a solid carbide ball-nosed end mill with a full-radius ball nose, 2 flutes, a 30° helix and a regular (medium) cut length. Coated with TiAlN, it is a versatile cutter for copy milling, contouring curved surfaces and machining internal part radii in steel, stainless steel and cast iron.

Key Features

• Solid carbide – premium micrograin carbide combines hardness and toughness for high wear resistance and long, consistent tool life.
• TiAlN coating – increases surface hardness, improves chip flow and extends tool life, allowing higher metal removal rates.
• Full-radius ball nose – designed for cutting internal part radii and for profiling contoured surfaces.
• 2 flutes, 30° helix – general-purpose geometry (cutter type N) for low to high resistance materials.
• Regular cut length – medium flute length that balances reach and rigidity.
• Plain cylindrical shank – fits standard collet chucks and shrink-fit holders.

Applications

• Copy milling and profile milling of contoured surfaces on moulds, dies and machined components
• Machining internal radii, concave corners and radiused grooves
• Steel and cast steel, stainless steel, and malleable, ductile and compacted graphite cast iron

The S213 is a single-ended solid carbide end mill with a full-radius ball nose at the cutting end and a plain cylindrical shank. The dimensions shown in the Specification Table are defined as follows:

• d1 – cutting diameter; the ball nose radius is half of d1 (full profile radius, e.g. 2.5 mm on the 5 mm size)
• d2 – shank diameter; equal to d1 on most sizes, and larger than d1 on the 7 mm and 9 mm sizes
• l2 – length of cut, measured from the ball tip along the 2 helical flutes (30° helix)
• l1 – overall length of the tool

Choosing the Right Dormer Ball-Nosed End Mill

• S213 – TiAlN coated, 2 flutes, 3 – 12 mm: first choice for steel, cast steel, stainless steel and cast iron, where the coating raises surface hardness and tool life for higher metal removal rates.
• S113 – bright finish, 2 flutes, 2 – 20 mm: the same regular-length 30° helix geometry without coating; the bright finish improves chip flow in soft or non-ferrous materials such as aluminium and copper alloys.
• S239 – coated, 4 flutes, 2 – 12 mm: a 4-flute regular-length ball nose for applications where more cutting edges are preferred.
• Selecting the diameter: the ball radius equals half of the cutting diameter, so choose a size whose radius is equal to or smaller than the smallest concave radius on the part, and use the largest diameter that fits for maximum rigidity.