Make Perfect Conical Holes to Fit Varying Screw Heads with Rushmore's Single or 6-Flute Countersinks. The straight shank, single or 6-flute countersink tool is made from C2 grade solid carbide, perfect to produce a flat bottom for a flat-head screw to fit flush with the surface. This product supports enlarging the opening of a hole on a wide range of workpiece materials including Steel, Stainless Steel, High-Temp Exotic alloy, Non-Ferrous, Cast Iron, Plastics. The tool is exclusively designed for general-purpose countersinking, chamfering, or deburring. The countersinks work best on speeds upto 500 rpm, depending on the size of the cutter and material. Rushmore offers single and 6-flute countersinks in standard sizes of included angles 60°, 82°, 90° to fit most head screws. All models are available in 6 different sizes 1/4, 3/8, 1/2, 5/8, 3/4 and 1 inch with a shank diameter of 1/4, 3/8 and 1/2". The tool is offered in varying tool lengths of 2, 2-1/2 and 3". Tolerances of shank diameter range +0.000" / -0.001" and included angle tolerances +/- 1°. Rushmore USA Tools offers quality affordable American-made tooling with the superior speed and feed that your applications require. Rushmore's end mills are perfect for all aerospace, medical, automotive, or production machining solutions.
Applications
For all materials except hardened steel.
Features
Speeds of 150 to 500 RPM, depending on size of cutter and materials.