Основной каталог Kyocera 2021 - 2022 - страница 970

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Recommended cutting conditions

Recommended chipbreaker (fz: mm/t)Recommended insert grades (Vc: m/min)
Workpiece materialReco for ROMU12 tmmended feed rate (Reference ype: ap=3 mm/for ROMU16 tyvalue) pe: ap=4 mmMEGACOAT NANOCVD Coated carbide
GMSMGHPR1535PR1525PR1510CA6535
Carbon steel★ 0.1~0.2~0.3✩ 0.06~0.15~0.2✩ 0.15~0.3~0.35✩ 120~180~250★ 120~180~250--
Alloy steel★ 0.1~0.2~0.3✩ 0.06~0.15~0.2✩ 0.15~0.3~0.35✩ 100~160~220★ 100~160~220--
Mold steel★ 0.1~0.15~0.25✩ 0.06~0.12~0.2✩ 0.15~0.2~0.3✩ 80~140~180★ 80~140~180--
Stainless steel (Austenitic related)✩ 0.1~0.15~0.2★ 0.06~0.12~0.2✩ 0.15~0.2~0.25★ 100~160~200✩ 100~160~200--
Stainless steel (Martensitic related)✩ 0.1~0.15~0.2★ 0.06~0.12~0.2✩ 0.15~0.2~0.25✩ 150~200~250--★ 180~240~300
Stainless steel (Precipitation Hardening)★ 0.1~0.15~0.2✩ 0.06~0.12~0.2✩ 0.15~0.2~0.25★ 90~120~150---
Gray cast iron★ 0.1~0.2~0.3-✩ 0.15~0.3~0.35--★ 120~180~250-
Nodular cast iron★ 0.1~0.15~0.25-✩ 0.15~0.2~0.3--★ 100~150~200-
Ni-base heat-resistant alloys★ 0.1~0.12~0.15✩ 0.06~0.1~0.15✩ 0.12~0.15~0.2✩ 20~30~50--★ 20~30~50
Titanium alloys✩ 0.1~0.12~0.15★ 0.06~0.1~0.15-★ 40~60~80-✩ 30~50~70-

★: 1st Recommendation ✩: 2nd Recommendation M Machining with coolant is recommended for Ni-base heat-resistant alloys and titanium alloys.

  • The bold-faced number indicates a center value of recommended cutting condition. Adjust the cutting speed and the feed rate within the above conditions according to the actual machining situation.
  • Recommended feed rate is the reference value when ap is RE/2 (3mm for ROMU12, 4mm for ROMU16). For lower ap than the above conditions, the conversion factor in the following table is recommended.
Insertap (Recommended)Max. apConversion factor for feed per tooth fz
ap=0.5mmap=1mmap=2mmap=3mmap=4mm
ROMU12 type3mm or less6mm2.11.51.11.0 (Standard)-
ROMU16 type4mm or less8mm2.41.71.31.11.0 (Standard)
  • Example (ROMU12 type, carbon steel, GM chipbreaker, ap=1mm)

fz=0.2mm/t × 1.5 = fz = 0.3 mm/t

(Reference value for carbon steel and GM chipbreaker) (Conversion factor for ROMU12 type, ap=1mm) (Recommended feed rate)

  • Recommended ap: 3mm or less for ROMU12, 4mm or less for ROMU16 Except the case that ap temporally surpass the recommended ap, machining under the recommended ap is recommended.

Corner-R shape during processing Y(Gap between insert corner-R) Corner-R shape during processing with MRW (Ref. to the right figure)

Insert ROMU12 typeAPMX 6 mmX 3 mmY 0.1 mmInsert corner
ROMU16 type8 mm4 mm0.1 mmAPMX X(Recommended ap)
  • When machining with larger ap than recommended ap (X), there is a gap (Y) between the workpiece corner and Insert corner-R(RE).
  • The above figure is estimation. There would be ±0.2mm variation depending on the cutting conditions.