PFERD Tools Main Catalogue Page 205
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Countersink tools HSS flat countersink Recommended rotational speed range [RPM] To determine the recommended cutting speed range [m/min], please proceed as follows: ① Select the material group to be machined. ② Select the type. ③ Establish the cutting speed range. To determine the recommended rotational speed range [RPM], please proceed as follows: ④ Select the required diameter. ⑤ The cutting speed range and the diameter determine the recommended rotational speed range. ① Material group Steels up to 700 N/mm² Steel, cast steel Steels over 700 N/mm² Stainless steel (INOX) Non-ferrous metals Construction steels, carbon steels, tool steels, alloyed and non-alloyed steels, case-hardened steels, cast steel, tempering steels Austenitic and ferritic stainless steels Soft non-ferrous metals Aluminium alloys Brass, copper, zinc Grey cast iron, white cast iron Cast iron Plastics, other materials ② Design Rust and acid-resistant steels Hard non-ferrous metals Bronze, titanium/titanium alloys, hard aluminium alloys (high Si content) Cast iron with flake graphite EN-GJL (GG), with nodular graphite/nodular cast iron EN-GJS (GGG), white annealed cast iron EN-GJMW (GTW), black annealed cast iron EN-GJMB (GTS) ③ Cutting speed Fine (F) Medium (M) Tapping hole (GKL) Fine (F) Medium (M) Tapping hole (GKL) Fine (F) Medium (M) Tapping hole (GKL) Fine (F) Medium (M) Tapping hole (GKL) Fine (F) Medium (M) Tapping hole (GKL) 10–20 m/min 10–15 m/min 10–15 m/min 15–20 m/min 10–20 m/min Fine (F) Medium (M) 10 m/min Tapping hole (GKL) Fine (F) Fibre-reinforced thermoplastics and duroplastics, hard rubber, wood Example: Flat countersink FLS HSS DIN 373 15.0 F, Flat countersink dia. 15 mm. Steels up to 700 N/mm². Cutting speed: 10–20 m/min Rotational speed range: 220–440 RPM 2 Medium (M) 10–15 m/min Tapping hole (GKL) ④ Countersink dia. [mm] 6.00 8.00 10.00 11.00 15.00 18.00 20.00 10 530 400 320 290 220 180 160 ⑤ Cutting speeds [m/min] 15 Rotational speeds [RPM] 795 600 480 435 330 270 240 20 1,060 800 640 580 440 360 320 Catalogue Page 2 117
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