Walter-titex 5153740 Screw Machine Drill Bit 0.6875 in

Product Description

The WALTER-TITEX 5153740 is a screw machine length drill bit ground from Cobalt Vanadium High Speed Steel for high-performance drilling in demanding materials. It measures 0.6875 inches (11/16 inches) in diameter with an overall length of 4-27/32 inches and a flute length of 2-7/16 inches. The 130-degree split point reduces walking and cutting force at entry, while the parabolic flute geometry promotes efficient chip evacuation. A web-thinned, tapered web design lowers thrust requirements and improves penetration rates. This bit is sold individually and suited for machine shop, maintenance, and fabrication applications where a shorter, rigid drill platform is required.

This drill bit is engineered for universal performance across a wide range of workpiece materials including steel, stainless steel, cast iron, hard materials, and non-ferrous metals. The screw machine length format - shorter than jobber length - provides added rigidity and reduced deflection, making it well-suited for CNC machining centers, drill presses, and turret lathes. The straight cylindrical shank fits standard drill chucks and collet holders without modification. Maximum drilling depth is 1.700 inches (44.00 mm), keeping it appropriate for through-holes and blind bores within that range.

Key Features

• 0.6875 inches (11/16 inches) diameter with a diameter tolerance of -0.00106 to 0.00000 inches for precision fitment
• Cobalt Vanadium HSS construction for heat and wear resistance in tough alloys and stainless steel
• 130-degree split point minimizes walking and reduces required thrust at drill entry
• Parabolic 2-flute geometry with web thinning and tapered web for fast chip evacuation and lower cutting forces
• Screw machine length (4-27/32 inches overall) delivers increased rigidity versus jobber-length bits
• Bright/uncoated finish compatible with a broad range of cutting fluids and dry cutting applications
• Meets DIN, ISO, and BS standards; Series A1148 designation

Compatibility

Designed for use in standard drill chucks and collet holders accepting a straight cylindrical shank at 0.6875 inches diameter. Compatible with workpiece materials including steel, stainless steel, cast iron, hard materials, and non-ferrous metals as specified by the manufacturer for Series A1148.

Installation Notes

Installation and use should be performed by qualified machinists or tool-and-die professionals familiar with speeds, feeds, and cutting fluid selection for the target material. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits. Power down and de-energize the machine before changing tooling. Do not exceed the maximum drilling depth of 1.700 inches per pass without retracting to clear chips.