Union Tool has now extended its HB range of two flute Super Micro Diameter Ball End Mills to accommodate new sizes. Available from Rainford Precision Machines Ltd, the high quality Japanese Union Tool range is ideal for ultra precision machining that is required in the medical, research & development, aerospace and electronics industries.

The new additions to the HB range include 60 and 80 micron diameters, as well as 100 micron diameter. These tools have a respective radius of 0.03, 0.04 and 0.05mm and they comfortably machine anything from copper to carbon, alloy and pre-hardened steels and cast iron up to 55HRC.

The ultra precise HB Micro series has a diameter and radius tolerance of 0/-0.01mm and +/-0.002mm respectively. This guarantees customers that their cutting tools can meet the accuracy and tolerance demands of any application. The HB Micro series has a length of cut equal to the cutting diameter, with a shank diameter of 4mm and overall length of 50mm.

The new range of micro endmills from Union Tool has a shank taper angle of 11 degrees, this promotes cutter strength and prolongs tool life considerably. Added to this, the HB Micro range has a straight flute that further enhances cutter rigidity. This exceptional stability and rigidity provides outstanding tool life and surface finish. Combining these attributes with the Union Tool specialised HardMax coating further extends tool life beyond competitor products. The design and coating of the HB Micro series enables it to comfortably machine at speeds over 50,000rpm and feed rates beyond 200mm/min.