Precision Twist Drill 5996630 Cobalt Drill Bit 0.6562 in

Product Description

The PRECISION TWIST DRILL 5996630 is a taper length cobalt drill bit designed for heavy-duty drilling in ferrous and non-ferrous metals. It measures 0.6562 inches (21/32 inch) in diameter with a 9-inch overall length and a 5.125-inch spiral flute. The 135-degree notched split point promotes self-centering, reducing the need for a center punch on hard materials. The tapered web configuration and web-thinned geometry reduce thrust and improve chip evacuation. Licensed HVAC, plumbing, and industrial tradespeople installing or fabricating metal components will find this bit well-suited for production and maintenance drilling applications.

This bit is rated for use in a broad range of materials including alloy steel, carbon steel, hardened steel, stainless steel, cast iron, malleable iron, aluminum, aluminum alloy, brass, bronze, high-strength bronze, copper, nickel, nickel alloy, magnesium, magnesium alloy, cermet, graphite, and reinforced plastic materials. The straight shank fits standard drill chucks without adapters. It is intended for right-hand cutting in both handheld and machine-mounted drill setups where taper length reach is required.

Key Features

• Cobalt tool material for elevated heat resistance and durability in hard metals
• 135-degree notched split point for self-centering entry without a center punch
• Taper length body at 9 inches OAL provides extended reach over jobber-length bits
• 5.125-inch spiral flute with 6xD flute-to-diameter ratio for efficient chip clearance
• Web-thinned, tapered web reduces drilling thrust and feed force
• Straight shank at 0.6562 inches fits standard three-jaw drill chucks directly
• Coated finish for added surface protection and reduced friction during cutting

Compatibility

Designed for use in standard drill chucks accepting a 0.6562-inch straight shank. Suitable for right-hand drilling in machine tools, drill presses, and heavy-duty handheld drills. Conforms to ANSI standards for taper length drill bits in the M51CO series.

Installation Notes

Installation and use should be performed by qualified machinists or tradespeople familiar with metal drilling practices. Secure the workpiece fully before drilling and verify chuck grip on the straight shank before operating. Always wear appropriate eye and hand protection when operating drill bits in ferrous or hardened materials. Follow applicable OSHA and facility safety guidelines for rotating tool use.