56001B 56000A 163 END MILLS TECHNICAL INFORMATION on solid carbide slitting saws Cooling: We recommend using highly effective cooling when cutting with solid carbide tools. If the cooling is not sufficient or is irregular in nature, this can cause fractures in the tools or even result in complete failure. When in doubt, use water-oil emulsions or cutting oil. Exception: Grey cast iron is usually machined while dry and plastics are also cut dry. Occasionally, compressed air or water may be used. Exercise caution with magnesium alloys. Magnesiummay explode if it comes into contact with water. Therefore, always cut magnesium alloys while they are dry. Feed rates: As a guideline, use a feed rate per saw tooth of 0.005 mm for very hard materials and 0.05 mm for softer non-ferrous metals. For a metal of typical hardness, start with approx. 0.01 mm per tooth – i.e., much slower than with high speed steel. Depending on the results you achieve, you can reduce or increase the feed rate slightly. Your choice of feed rate is affected by many unpredictable factors. The machinability of the material plays a role as does the speed, feed type, workpiece clamping and the state of your machines and tools. Additional factors include the number of saw teeth that are engaged at any given moment, the saw diameter and saw width. Therefore it is only possible to provide approximate values. Depending on the machining conditions, you may have to increase or decrease this value. When using Karnasch solid carbide tools in particular, lower feed rates and finer tooth pitches will result in improved cutting surfaces. Depending on the material being processed, start with the feed rate given in the table below. Multiplying the number of teeth with the speed gives the feed rate to be set on your machine in mm/min. For non-ferrous metals, you can also use spray oil lubrication if this is available on the machine being used: or type: 60 1150 (Mecut spray). Material Coolant/lubricant Cutting speed Suggested feed rate Sz (mm / tooth) Steels with up to 600 N/mm2 (free-cutting steel) Steels from 600 to 1000 N/mm2 (structural steel) Stainless steel High-alloyed steel Titanium Grey cast iron harder than 220 HB Copper alloys Brass alloys Aluminium Emulsion / Mixture ratio 1:20 150 m/min. 0.010 – 0.030 mm Emulsion / Mixture ratio 1:15 120 m/min. 0.005 – 0.020 mm Emulsion / Mixture ratio 1:10 80 m/min. 0.005 – 0.015 mm Emulsion / Mixture ratio 1:10 70 m/min. 0.005 – 0.010 mm Cutting oil 60 m/min. 0.003 – 0.005 mm Dry 100 m/min. 0.005 – 0.010 mm Emulsion 300 m/min. 0.020 – 0.040 mm Spray oil cooling / Emulsion 500 m/min. 0.010 – 0.040 mm Spray oil cooling / Emulsion 1000 – 2000 m/min. 0.010 – 0.040 mm Feed per tooth: Sz (mm / tooth) S = feed (mm / min.) Z = number of teeth n = speed (rpm) Feed rate: S (mm / min) Sz = feed per tooth (mm / tooth) Z = number of teeth n = speed (rpm) All of the given values are only intended as a guideline. S = Sz · Z · n Sz = S Z · n 11 Index 10 9 OIL 8 7 6 5 4 3 2 1
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