BurrsMAR18

Tel: 01509 610300 • Fax: 01509 610400 • Email: sales@merlintools.co.uk • www.merlintools.co.uk 25 manufactured Tungsten Carbide Burrs Burr Application Data Material Group Single Cut Double Cut Double Cut AITiN Aluminium Cut Aluminium l Brass, Bronze, Copper l Cast Iron l l l Plastics l Steel, <48 HRc l l l Steel, 48-60 HRc l l l Steel, Carbon l l l Steel, Chrome l l l Stainless Steel l l l Steel Weldments l l l Titanium l l l Zinc l Suitable for use = l Burr Recommended R.P.M. Guide Burr Diameter R.P.M. 3mm Solid Carbide 45,000 - 60,000 5mm Solid Carbide 35,000 - 40,000 5mm Carbide Head Brazed to 3mm Steel Shank 30,000 - 35,000 6mm Solid Carbide 30,000 - 35,000 6mm Carbide Head Brazed to 3mm Steel Shank 25,000 - 30,000 8mm Carbide Head Brazed to 6mm Steel Shank 25,000 - 30,000 10mm Carbide Head Brazed to 6mm Steel Shank 25,000 - 30,000 11mm Carbide Head Brazed to 6mm Steel Shank 20,000 - 25,000 12mm Carbide Head Brazed to 6mm Steel Shank 20,000 - 25,000 16mm Carbide Head Brazed to 6mm Steel Shank 15,000 - 20,000 18mm Carbide Head Brazed to 6mm Steel Shank 15,000 - 20,000 25mm Carbide Head Brazed to 6mm Steel Shank 12,000 - 18,000 Technical Information - Application & Speed Data When working with long shank burrs, the burr must be in contact with the workpiece (or inserted in the bore or slot to be machined) before the machine 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 shank failure and hence an increased accident risk. If the continuous contact between the tool and Burr Diameter (mm) ≥ 75mm Overall Shank Length ≥ 150mm Overall Shank Length Disengaged (without contact) Engaged (with contact) Disengaged (without contact) Engaged (with contact) 3 10,000 30,000 N/A N/A 6 6,000 15,000 9,500 13,500 9.5 N/A N/A 6,000 11,000 12 N/A N/A 3,000 7,000 the workpiece is not guaranteed, the maximum idling speeds stated in the table should not be exceeded. For safety reasons, the maximum application speeds with contact to the workpiece require a reduction in the recommended standard shank burr speed. The reduced speeds are stated in the table below. To determine the recommended rotational speed range, please proceed as follows: