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Professional edge rounding with HSSCo8 precision

The HSSCo8 Corner Rounding Cutter is a specialized machining tool for producing clean, rounded workpiece edges. Thanks to its 8 percent cobalt content, this high-speed steel exhibits excellent heat resistance and reliably handles varying cutting conditions. With four flutes and a 0° helix angle, the tool supports chatter-free contouring and creates highly accurate radii. Its uncoated design makes this corner rounding cutter particularly suitable for versatile applications in general steel machining as well as in aluminum alloys, preventing the formation of troublesome built-up edges.

Suitable materials

Technical data

  • Mill type: Corner Rounding Cutter (no centre cutting)
  • Material grade: HSSCo8 (high-speed steel with 8% cobalt)
  • Coating: Uncoated
  • Number of flutes: 4
  • Helix angle: 0°
  • Shank type: Weldon shank
  • Packaging unit: 1 Pc

Dimensions of HSSCo8 Corner Rounding Cutter

  Item Nr. r D d(h6) L Z
VKF-Z4-D8.0-R1.0 HSSCo8 2351101 1,0 8 10 60 4
VKF-Z4-D9.0-R1.5 HSSCo8 2351102 1,5 9 10 60 4
VKF-Z4-D10.0-R2.0 HSSCo8 2351103 2,0 10 10 60 4
VKF-Z4-D11.0-R2.5 HSSCo8 2351104 2,5 11 10 60 4
VKF-Z4-D12.0-R3.0 HSSCo8 2351105 3,0 12 12 60 4
VKF-Z4-D13.0-R3.5 HSSCo8 2351106 3,5 13 12 60 4
VKF-Z4-D14.0-R4.0 HSSCo8 2351107 4,0 14 12 60 4
VKF-Z4-D15.0-R4.5 HSSCo8 2351108 4,5 15 12 60 4
VKF-Z4-D16.0-R5.0 HSSCo8 2351109 5,0 16 12 60 4
VKF-Z4-D19.0-R5.5 HSSCo8 2351110 5,5 19 16 67 4
VKF-Z4-D20.0-R6.0 HSSCo8 2351111 6,0 20 16 67 4
VKF-Z4-D21.0-R6.5 HSSCo8 2351112 6,5 21 16 71 4
VKF-Z4-D22.0-R7.0 HSSCo8 2351113 7,0 22 16 71 4
VKF-Z4-D23.0-R7.5 HSSCo8 2351114 7,5 23 16 71 4
VKF-Z4-D24.0-R8.0 HSSCo8 2351115 8,0 24 16 71 4
VKF-Z4-D25.0-R8.5 HSSCo8 2351116 8,5 25 25 85 4
VKF-Z4-D26.0-R9.0 HSSCo8 2351117 9,0 26 25 85 4
VKF-Z4-D27.0-R9.5 HSSCo8 2351118 9,5 27 25 85 4
VKF-Z4-D28.0-R10.0 HSSCo8 2351119 10,0 28 25 85 4
VKF-Z4-D31.0-R10.5 HSSCo8 2351120 10,5 31 25 90 4
VKF-Z4-D32.0-R11.0 HSSCo8 2351121 11,0 32 25 90 4
VKF-Z4-D34.0-R12.0 HSSCo8 2351122 12,0 34 25 90 4
VKF-Z4-D41.0-R12.5 HSSCo8 2351123 12,5 41 25 100 4
VKF-Z4-D42.0-R13.0 HSSCo8 2351124 13,0 42 25 100 4
VKF-Z4-D44.0-R14.0 HSSCo8 2351125 14,0 44 25 100 4
VKF-Z4-D46.0-R15.0 HSSCo8 2351126 15,0 46 25 100 4
VKF-Z4-D48.0-R16.0 HSSCo8 2351127 16,0 48 25 100 4
VKF-Z4-D52.0-R18.0 HSSCo8 2351128 18,0 52 32 112 4
VKF-Z4-D56.0-R20.0 HSSCo8 2351129 20,0 56 32 112 4

Cutting data

Workpiece Material Tensile Strength Cutting Speed Feed fz (mm)
(N/mm²) Ae Vc (m/min) Ø 8-11 Ø 12-16 Ø 20 Ø 24-28 Ø 34-48

Structural Steel

<450 1/10 10-20 0,015-0,024 0,019-0,03 0,033 0,038-0,05 0,048-0,058

Tempered Steel

450-700 1/10 10-15 0,015-0,024 0,015-0,03 0,033 0,039-0,05 0,048-0,058

Tooling Steel

>700 1/10 10-15 0,015-0,024 0,015-0,03 0,033 0,039-0,05 0,048-0,058

Aluminum/Aluminum-alloys

<600 1/10 85-90 0,018-0,023 0,022-0,031 0,034 0,38-0,45 0,05-0,058

Applications

This corner rounding cutter is purpose-built for milling quarter-circle profiles on external workpiece edges. It is an excellent choice for professional machine and fixture construction when components need to be deburred or provided with defined radii. The geometry creates very good conditions for machining structural steel, tempered steel, and tooling steel with tensile strengths above 700 N/mm², as well as non-ferrous metals like aluminum.

Due to the toughness of the cobalt-alloyed HSS substrate, the milling cutter provides stable machining operations even on conventional machines. The standardized Weldon shank ensures that the tool holder firmly secures the cutter against rotation, guaranteeing optimal power transmission during the milling process.

Special features

The end mill is characterized by its four straight flutes, which promote particularly smooth cutting behavior during edge rounding. Because it is designed with no centre cutting capabilities, its geometry is uncompromisingly tailored for profile-shaping external machining. The uncoated, sharp cutting edges facilitate a smooth chip flow, especially in softer materials that are prone to cold welding, helping to maintain a high surface finish on the completed workpiece.

2351101

Data sheet

Materials
NF-Metals
Steel
Solid carbide Mills
Quarter Circle Cutter

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