Pitched at the tool-making industry, Rainford Precision has introduced the series of HSB-S Unimax ball-nose end mills from Union Tool.

The range of small, two-flute, short-shank end mills are ground to an H4 tolerance of 0/-0.004 mm.
Designed for application with precision tool holders such as shrink-fit types, the HSB-S is offered with an overall length from 35 to 40 mm to minimise tool protrusion and maximise rigidity. Importantly, a key feature of the range is the ±0.003 mm tolerance of the ball-nose radius, which is intended to improve surface finish.
The HSB-S Unimax can be offered with a ball-nose radius of 0.1, 0.15, 0.2, 0.3, 0.4, 0.5, 0.75, 1, 1.5 or 2 mm, and a length of cut from 0.2 to 4 mm. Designated as a series for machining materials of 40 HRc and above, the tools feature HardMax coating technology and negative rake-angle geometry to provide a balance of tool hardness, heat-resistance and durability. The negative rake reduces as the radius transitions to the periphery, which is said to minimise tool deflection and generate mirror-finish surfaces.
HSB-S end mills can be applied to materials such as carbon, alloy, pre-hardened and hardened steels up to 70 HRc. Additionally, the HardMax coating enables the HSB-S to process copper, cast iron, titanium alloys and heat-resistant alloys.
For manufacturers seeking a long-necked version for reaching difficult-to-access surfaces, Rainford Precision offers the HSLB-S series. Available with a ball-nose radius from 0.1 to 3 mm, the HSLB-S range has a maximum clearance length of 20 mm with an overall length from 35 to 50 mm, depending upon the selected tool diameter.
For further information www.rainfordprecision.com