Kennametal 4151646 Screw Machine Drill Bit 3/32 in

Product Description

The KENNAMETAL 4151646 is a solid carbide screw machine length drill bit designed for high-precision drilling in tight-tolerance machining applications. Built to DIN 6537K specification, it features a 140-degree point angle and a multilayer TiAlN coating that extends tool life under demanding cutting conditions. The bit measures 0.0938 inches (3/32 inches) in diameter with an overall length of 2.2835 inches (58.00 mm). It runs in a right-hand, regular spiral flute configuration and uses a straight cylindrical shank. This tool is intended for use by machinists and tool-and-die professionals in CNC and manual screw machine operations where stub-length rigidity is required.

The 4151646 fits applications requiring compact drill length and high radial stiffness, such as short-hole drilling in metals on screw machines, machining centers, and drill presses. The stub-length body reduces deflection at small diameters. The 3xD flute-to-diameter ratio supports chip evacuation in shallow holes. No coolant-through capability is present, so external coolant or dry cutting conditions apply. The Series B041A-CPG designation identifies the full product family within the KENNAMETAL catalog.

Key Features

• Solid carbide construction for rigidity and wear resistance at small diameters
• 140-degree point angle reduces thrust and improves centering on entry
• TiAlN multilayer coating extends tool life in ferrous and hard materials
• Screw machine (stub) length reduces deflection compared to jobber-length bits
• Tapered web configuration supports point strength and regrindability
• Straight cylindrical shank compatible with standard ER collets and drill chucks

Compatibility

Designed as a direct-fit replacement within the KENNAMETAL Series B041A-CPG product family. Fits any tool holder or collet chuck accepting a 0.1575-inch (4.00 mm) straight shank, including standard ER11 and ER16 collet systems with the appropriate collet size.

Installation Notes

This bit is installed by licensed machinists or qualified tool-room personnel. Ensure the spindle is fully de-energized and locked out before changing tooling. Seat the shank fully and concentrically in the collet or chuck to prevent runout at this small diameter. No coolant-through ports are present; direct external coolant flow to the cutting zone or verify suitability for dry cutting before use.