PFERD Tools Main Catalogue Página 101
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TC burrs Rotational speeds Example: TC burr, ALLROUND cut, Burr dia. 12 mm. Coarse stock removal on steels up to 1,200 N/mm². Cutting speed: 450–750 m/min Rotational speed range: 12.000–20.000 RPM ⑤ Burr dia. [mm] 250 350 1.5 2 3 4 5 6 8 10 12 13 16 20 25 53,000 40,000 27,000 20,000 16,000 13,000 10,000 8,000 7,000 6,000 5,000 4,000 3,000 74,000 56,000 37,000 28,000 22,000 19,000 14,000 11,000 9,000 9,000 7,000 6,000 4,000 450 ⑥ Cutting speeds [m/min] 600 750 900 Rotational speeds [RPM] 1,100 1,300 95,000 127,000 159,000 191,000 233,000 275,000 72,000 95,000 119,000 143,000 175,000 206,000 48,000 64,000 80,000 95,000 117,000 138,000 36,000 48,000 60,000 72,000 88,000 104,000 29,000 40,000 48,000 57,000 70,000 83,000 24,000 32,000 40,000 48,000 59,000 70,000 18,000 24,000 30,000 36,000 44,000 52,000 14,000 19,000 24,000 29,000 35,000 41,000 12,000 16,000 20,000 24,000 30,000 34,000 11,000 15,000 22,500 22,000 27,000 32,000 9,000 12,000 15,000 18,000 22,000 26,000 7,000 10,000 12,000 14,000 17,000 20,000 6,000 8,000 10,000 11,000 13,000 16,000 Tungsten carbide burrs with long shanks Tungsten carbide burrs with long shanks are particularly well suited to working in hard-toreach areas. PFERD holds long-shank versions in stock for the respective product groups. Longshank versions are available with the 3 PLUS, STEEL, Z5 and TOUGH cuts. All long shanks can be individually shortened. Tungsten carbide burrs with the designation GL 75 mm are made from solid tungsten carbide, which means they can only be shortened using diamond tools. Additional variants can be custom-made on request. In some applications, drive spindle extensions are an economic alternative to customized burrs with long shanks. For more information please see catalogue section 9. Safety notes: ■ Tungsten carbide burrs with long shanks are not suitable for robotic or stationary applications. There is a risk that they may break off. Use only rigid clamping systems/ drives. To determine the recommended rotational speed range [RPM], please proceed as follows: ① Select the required burr diameter. ⑦ For the maximum application speed [RPM] with contact with the workpiece, please refer to the right-hand side of the table. Example: TC burr, SL 150 mm, Cut 3 PLUS, Burr dia. 12 mm. Coarse stock removal on steels up to 1,200 N/mm². Maximum application speed with contact with the workpiece: 7.000 RPM ■ When working with long shank lengths, it is crucial that the tool is in contact with the workpiece (or inserted in the bore or slot to be machined) before the drive system is turned on. As a rule, the tool must remain in contact with the workpiece for as long as the machine is running. Failure to observe this procedure may result in burr failure (bending) and hence an increased risk of accidents. If continuous contact between the tool and the workpiece is not guaranteed, the ⑧ maximum idling speeds stated in the table must not be exceeded. ① Burr dia. [mm] 3 6 8 10 12 ■ For safety reasons, the maximum application speeds ⑦ with contact with the workpiece require a reduction in the recommended rotational speed of tungsten carbide burrs with standard shanks. The reduced rotational speeds are stated in the table below. ⑧ Maximum idling speed ⑦ Maximum application speed [RPM] without contact with the [RPM] with contact with the workpiece workpiece Shank length [mm] 75 150 75 150 10,000 6,000 - 8,000 6,000 4,000 3,000 31,000 15,000 - 15,000 11,000 9,000 7,000 Catalogue Page 2 13 2
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