Corner Radius Carbide End Mill WRN (standard length)D1 Ø20 mm × D2 Ø20 mm × L1 45 mm × L 100 mm × R 0,5 mm × Z4
- D1 — Cutting diameter
- Ø20mm
- D2 — Shank diameter
- Ø20mm
- L1 — Flute length
- 45mm
- L — Overall length
- 100mm
- R — Corner radius
- 0,5mm
- Z — Number of flutes
- 4
$319.00
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Starting cutting values for WRN200054
Calculated for a Ø20 mm cutting diameter and 4 flutes. Radial engagement is taken as ae = 0.5×D and axial depth of cut as ap = 1×D. Values assume a carbide tool and medium duty conditions; machine rigidity and workholding change the result. These are calculated reference values. They change considerably with the machine, tool holder, clamping and the result you need; applying them remains the responsibility of the user.
| Workpiece material | Vc (m/min) | n (rpm) | fz (mm/tooth) | vf (mm/min) | Suggested coating |
|---|---|---|---|---|---|
| Alaşımlı çelik (42CrMo4) | 115 | 1,830 | 0.115 | 842 | TiAlN, AlTiN |
| Ostenitik paslanmaz (304/316) | 85 | 1,353 | 0.092 | 498 | AlCrN, AlTiN |
| Alüminyum, dövme (6061/7075) | 550 | 8,754 | 0.217 | 7,616 | Kaplamasız cilalı, DLC |
| Sertleştirilmiş çelik 45–55 HRC | 85 | 1,353 | 0.056 | 303 | nACo/AlTiSiN, AlCrN |
About this size
- Corner radius end mill, corner radius R 0.5 mm; combines the side cutting capability of a square end mill with corner strength. When axial engagement exceeds the radius, the effective diameter equals the nominal diameter.
- At 20 mm spindle power and torque start to be the limit. Required power should be calculated before programming, otherwise the machine reduces feed on its own and chip thickness drops below target.
- Length of cut to diameter ratio 2.3; standard configuration. At full engagement deflection becomes measurable and an allowance should be left on the side wall.
- 4 flutes. Table feed is directly proportional to flute count (vf = n x fz x z); when flute count changes, feed per tooth is held constant and table feed is recalculated.
These notes are derived from the geometry and ratios of this size and are general in nature. Machine, holder, clamping and coolant conditions change the outcome considerably.
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