Niagara Cutter N49101 5/16in 4-Flute HSS Ball End Mill

This is a new Niagara Cutter N49101 ball end mill in High Speed Steel (HSS), with a 5/16 in cutting diameter, 3/8 in shank diameter, 2 in length of cut, and 3-3/4 in overall length. The tool carries Niagara's internal designation SB470-0.313-F8-B-3-Z4, confirming a 4-flute (Z4) configuration with a full ball-nose geometry for profiling, contouring, slotting, and 3D surfacing operations in ferrous and non-ferrous materials. The shank features a Weldon flat for positive drive and pull-out resistance in standard end mill holders. The black oxide finish visible on one example in the photos provides mild corrosion resistance; the uncoated bright HSS variant is also shown, consistent with Niagara's SB470 series offering both finishes under the same EDP. Compatible with R8, CAT, BT, and straight-bore end mill holders accepting a 3/8 in shank.

Product Specifications