Sait 45021 3/8" x 3/4" Type SF3 Double Cut Tungsten Carbide BurDouble Cut (Alternate Cut) - Type SF. Double cut or Alternate cut is the most popular bur in ferrous applications. Manufactured with cuts made on the left and right spirals, this design produces a finer finish on material producing smaller chips and slivers. The double cut offers much smoother operation and greater tool control. Tungsten Carbide construction for long life and precision cutting. Excellent for confined or hard-to-reach areas. Use for deburring and finishing on ferrous and non-ferrous metals. Shaping and enlarging holes in steel. Removing welds. Smoothing castings. Specifications: Max RPM - (File Diameter - 1/4", RPM1 - 22000, RPM2 - 33000), (File Diameter - 3/8", RPM1 - 18000, RPM2 - 27000), (File Diameter - 1/2", RPM1 - 16000, RPM2 - 24000). Use RPM1 for iron, steel welds, cast iron, tool steels, die steels, bronze, brass and aluminum. Use RPM2 for stainless steel.
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