Mini End Mill Amana 51668 Mini Spiral For Steel, Stainless Steel & Composites, AlTiN Coated 0.050 D X 0.174 CH Amana Mini End Mill 51662 Micro machining applications involve miniature tooling that requires very high attention to tolerances and detail in their construction. Amana Tool HSS1662 HSS Spiral Aluminum Cutting Double Flute Down-Cut 1/2 D x 1-1/2 CH x 1/2 SHK 3-1/2 Inch Long Router Bit ; FREE delivery Wednesday, 14 January Miniature end mills also routinely require RPM in excess of 40, 000 RPM or more so attention to both RPM capacity and accurate chip-loads is mandatory. 2 & 4 Flute High Performance Square End Mini Mills Solid carbide spiral up-cut router bits/end square mini mills, designed for micro applications... High performance Designed For micro applications. Mini SC Spiral End Mill - Amana Tool 51667 for Steel & Composites 4 fluted tools offer the promise of improved surface finishes, longer service life and increased feed-rates with peripheral milling applications, #51662, direction Up-cut, (D) diameter 0., 020, (b) Cutting height 0., 060, (D) shank 1/8, overall length (L) 1-1/2, Type Square end, flutes 2, 51662 Altin coated CNC steel, stainless steel & composite square mini end mill 0., 020 dia x 0., 060 x 1/8 shank, Direction up-cut , (D) diameter 0., 020 , (B) Cutting height 0., 060 , (D) shank 1/8