Kennametal 4150332 Screw Machine Drill Bit 35/64 in Carbide

Product Description

The KENNAMETAL 4150332 is a solid carbide screw machine length drill bit designed for high-precision drilling in demanding metalworking applications. Built to DIN 6537K specification, this stub-length bit features a 140-degree standard point angle and a multilayer TiAlN coating at the tip to extend tool life and resist heat buildup at cutting speeds common in production environments. The overall length measures 4.2126 inches, with a 2.3622-inch flute length and a straight cylindrical shank diameter of 0.5512 inches. Machinists and toolroom professionals use this bit where controlled depth and rigid setup are required.

This drill bit is suited for screw machine and short-hole drilling operations in ferrous and non-ferrous metals, hardened alloys, and cast materials. The stub-length design minimizes deflection and improves rigidity in CNC machining centers, drill presses, and screw machines. The 3xD flute-to-diameter ratio and tapered web configuration support chip evacuation in blind and through-hole applications up to a maximum drilling depth of 1.6929 inches. It is sold and used as an individual bit in Series B041A-CPG.

Key Features

• Solid carbide construction provides rigidity and wear resistance in hard materials
• TiAlN tip coating reduces thermal wear and extends cutting life
• 140-degree point angle suited for flat-bottomed entry and reduced thrust in production drilling
• Stub-length design minimizes overhang and deflection for tighter tolerances
• Tapered web with regular spiral flute for reliable chip evacuation
• Conforms to DIN 6537K specification for dimensional consistency

Compatibility

Designed as an OEM-style replacement or direct tooling selection for CNC machining centers, drill presses, and screw machines requiring a 35/64-inch straight-shank solid carbide stub drill bit conforming to DIN 6537K.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine fully powered down and the spindle locked. Verify that the tool holder or collet accepts a 0.5512-inch straight shank before seating the bit. Inspect the cutting edges and coating condition before each use. Follow the machine manufacturer and applicable shop safety guidelines when setting spindle speeds and feed rates for carbide tooling.