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6-Flute End Mill VHM up to 60HRC - AITiN - for Steel & Stainless Steel

Kortools

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Ø6x18x6Dx50L

Ø6x24x6Dx75L

Ø8x24x8Dx60L

Ø8x32x8Dx75L

Ø10x30x10Dx75L

Ø10x40x10Dx100L

Ø12x32x12Dx75L

Ø12x45x12Dx100L

Ø16x45x16Dx100L

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Product description

6-flute solid carbide end mill up to 60 HRC — AlTiN — for steel and stainless steel

Solid carbide (VHM) · six flutes · 45° helix · AlTiN coating

A solid carbide cylindrical end mill for finishing steel and stainless steel. The tool has six flutes, a 45° helix and a five-layer AlTiN coating. Applications also include hardened steels up to 60 HRC and the heat-resistant alloys listed below. Select a size using cutting diameter, flute length, shank diameter and overall length.

1. Applications

The end mill is intended for face and side milling, particularly finishing operations. The table separates the principal material groups from the additional cast-iron application. Maximum workpiece hardness is 60 HRC.

Material group	Application scope
Steels — group P	General, carbon, alloy, pre-hardened, tool and mould steels.
Stainless steels — group M	Milling surfaces on stainless-steel components.
Hardened steels — group H	Machining hardened steels within the maximum hardness of 60 HRC.
Heat-resistant alloys — group S	Machining heat-resistant alloys specified for this geometry.
Cast iron — group K	Additional application; rated below the principal material groups listed above.

This end mill is not recommended for aluminium or copper. Select a tool with the appropriate geometry and application for those materials. Choosing the workpiece material is a separate decision from selecting cutting diameter and tool length.

2. Construction and specifications

Parameter	Specification
Tool type	Shank end mill; cylindrical end-cutting tool.
Tool material	VHM — monolithic solid carbide.
Number of flutes	6.
Helix angle	45°.
Coating	AlTiN — aluminium titanium nitride; five-layer design.
Maximum workpiece hardness	60 HRC.
Cutting-section construction	Six helical flutes, chip grooves and a large-core-diameter design.
Shank	Cylindrical; diameter stated in the selected size designation and variant card.
Dimensions identifying the size	Cutting diameter, flute length, shank diameter and overall length.
Dimension unit	Millimetres (mm).

VHM identifies the end mill body material, while AlTiN identifies its coating. The 45° value is the flute helix angle. The 60 HRC value describes the maximum workpiece hardness. These designations refer to separate tool characteristics and should not be interchanged.

3. Geometry and machining operations

The cutting section has six helical flutes and chip grooves. A large core diameter is part of this family’s geometry. The end mill is intended for surface finishing and side and face milling, with operating conditions selected for the workpiece material.

The illustrated operations include surface milling, side milling, slots and U-shaped slots, and hole machining by interpolation. For mould steels, the end mill can be used for roughing and finishing. Select the tool path and cutting-section engagement for the particular operation.

Flute length describes the cutting section. Overall length also includes the shank. A longer end mill does not automatically have longer flutes — both lengths are specified separately for the selected size.

4. How to read the size designation

The example Ø6x18x6Dx50L means a cutting diameter of 6 mm, flute length of 18 mm, shank diameter of 6 mm and overall length of 50 mm. The designation contains four dimensions in millimetres. The letters D and L distinguish shank diameter from overall length.

Designation element	Meaning	Example value
Ø6	Cutting diameter	6 mm
18	Flute length	18 mm
6D	Shank diameter	6 mm
50L	Overall tool length	50 mm

The number followed by D is the mounting-section diameter, rather than flute count. This end mill has six flutes, stated separately. Read the complete designation when comparing sizes: equal cutting diameters do not mean equal flute lengths or overall lengths.

The variant card shows four labelled dimensions and their values in separate rows. The photograph is illustrative and not to scale; read the designation and labels rather than measuring the proportions of the image.

5. Selecting diameter and length

First compare cutting diameter with the dimensions of the planned surface or slot. Then check the flute length required by the operation. Shank diameter identifies the mounting size, while overall length describes the complete tool length.

For tools with the same cutting diameter, check both lengths. A different shank size or cutting-section length can affect selection for the intended holder and access to the part. Check the selected end mill specifications before mounting it.

Keep tool projection from the holder as short as practicable while retaining the access needed by the operation. If greater projection is necessary, reduce spindle speed, feed or cutting engagement as appropriate for the operating conditions.

6. Mounting and preparation

Check mounting accuracy before machining. Measure tool runout before cutting; if it exceeds 0.01 mm, correct the mounting and check it again before starting the operation.

Check the tool size. Compare its four dimensions with the variant card and operation requirements.
Select the holder for the shank. Use the value followed by D and stated in its separate card row.
Set the required projection. Keep the length extending from the holder as short as practicable.
Measure runout. If it exceeds 0.01 mm, correct the mounting before cutting.
Account for the material. Confirm the application and hardness within this listing’s limit.

7. Cooling and machining stability

For machining steel, mist cooling or an air blast is recommended. Account for cooling and chip removal when preparing an operation for the selected material and mounting arrangement.

If unusual vibration or noise occurs during cutting, reduce spindle speed and cutting engagement until conditions improve. Increased tool projection may also require a lower feed. These recommendations concern the mounted tool in operation rather than a change to its dimensions.

The dimensions and helix angle identify the end mill but do not provide one speed and feed setting for every operation. Select settings for the material, hardness, tool size, projection and machining conditions.

8. Frequently asked questions

What is the maximum workpiece hardness?
60 HRC, within the application scope stated in this description.

What is the helix angle?
45°. This is a flute-geometry characteristic, separate from maximum workpiece hardness.

Can the tool machine stainless steel?
Yes. Stainless steels are among the principal applications of this family.

Can it be used for aluminium and copper?
The end mill is not recommended for those materials; select a tool intended for machining them.

What do D and L mean in the size designation?
D identifies shank diameter and L identifies overall length. Flute length is a separate element of the designation.