Kennametal 3640714 Screw Machine Drill Bit 3/8 in Carbide

Product Description

The KENNAMETAL 3640714 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. Built to DIN 6537K specification, it features a 3/8 inch (0.3750 inch) diameter, a 140-degree point angle, and a TiAlN coating that extends tool life under high heat and abrasion. The overall length is 3.5039 inches (89.00 mm), keeping the tool compact and rigid for stub-length drilling operations. A web-thinned, parallel web construction reduces thrust and improves chip evacuation. This bit is suited for machinists, toolroom technicians, and CNC operators working with hard-to-machine materials.

This drill bit is engineered for cutting high temperature alloys and stainless steel, where tool wear and heat buildup are primary concerns. The TiAlN coating provides oxidation resistance at elevated cutting temperatures, making it appropriate for dry or near-dry machining environments. Coolant-through capability allows internal coolant delivery directly to the cutting zone, which is critical when drilling deep holes in tough materials on CNC machining centers or gang drilling setups. The straight cylindrical shank seats reliably in standard drill chucks and collets with a 0.3906 inch shank diameter.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• TiAlN coating for high-temperature oxidation resistance and extended tool life
• 140-degree point angle reduces thrust and improves self-centering on hard alloys
• Coolant-through design delivers cutting fluid directly to the tip during deep hole drilling
• Web-thinned parallel web reduces cutting force and improves chip clearance
• DIN 6537K specification ensures dimensional consistency and fitment in standard toolholding

Compatibility

Designed for use in CNC machining centers, drill presses, and gang drilling fixtures accepting a straight cylindrical shank with a 0.3906 inch shank diameter. Optimized for high temperature alloys and stainless steel per the B291-YPL series application ratings.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the straight shank fully and evenly in the collet or chuck to the specified grip length before torquing the holder. When using coolant-through capability, verify that the machine spindle and toolholder support internal coolant delivery before pressurizing the system.