High-Performance Solid Carbide Roughers (continued) 4969 Series 422846 022846 Series • Centre cutting. • Centre cutting. • 3- and 4-flutes. • 4- and 6-flutes. • 45° helix. • 45° helix. • Flat shallow pitch. • Flat shallow pitch. • Ball nose. • Steels and cast irons. • DIN 6527. 422813 022813 Series 4906 Series • Centre cutting. • Centre cutting. • 3-flute. • 4-, 5-, and 6-flutes. • 30° helix. • 20° helix. • Flat shallow pitch. • Fine pitch. • DIN 6527. • Universal applications. 422818 022818 Series 4966 Series • Centre cutting. • Centre cutting. • 4-flute. • 3- and 4-flutes. • 30° helix. • 20° helix. • Flat shallow pitch. • Fine pitch. • Steels and cast irons. • Ball nose. • DIN 6527. • Universal applications. O52 widia.com