Osg 61509 Screw Machine Drill Bit 0.0354 in Hss

Product Description

The OSG 61509 is a screw machine length drill bit designed for high-performance drilling in metalworking and machining applications. Built from high speed steel with a coated finish, this bit features a 150-degree faceted drill point and a web-thinned, tapered web configuration that reduces cutting resistance and improves chip flow. The straight-cylindrical shank measures 3.00 millimeters in diameter, and the overall length is 38.00 millimeters (approximately 1.496 inches). With a 5xD flute-to-diameter ratio and two spiral flutes in a regular helix, the 61509 delivers consistent hole quality at small diameters. It is packaged individually and sold in single units.

This drill bit is suited for precision drilling in steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpiece materials. The screw machine length body is shorter than jobber-length bits, providing added rigidity and reduced deflection in CNC machining centers, drill presses, and screw machine setups where stub-length tooling is preferred. The 0.0354-inch (0.90 mm) diameter makes it appropriate for fine-tolerance hole work, including tapping pilot holes and clearance holes in thin-gauge or hardened material.

Key Features

• High speed steel construction with coated finish for extended tool life in ferrous and non-ferrous materials
• 150-degree faceted drill point reduces thrust and walking on entry
• Web-thinned, tapered web lowers cutting force at small diameters
• Screw machine (stub) length body increases rigidity and minimizes deflection
• Right-hand cut with two spiral flutes for efficient chip evacuation
• Straight-cylindrical shank for standard drill chuck compatibility

Compatibility

Designed as an OEM-style replacement and standard tooling option for machining operations requiring a 0.90 mm (0.0354-inch) stub-length drill bit in the OSG Series 1100 product line. Compatible with any standard drill chuck or collet accepting a 3.00 mm straight-cylindrical shank.

Installation Notes

This bit is installed and serviced by machinists and tool-and-die professionals in shop environments. Secure the straight shank firmly in a collet, drill chuck, or quick-change holder before operation, and verify runout within acceptable tolerance for the application. At this diameter, feed rate and spindle speed must be carefully controlled to avoid bit breakage — consult the tooling manufacturer speed-and-feed tables for the specific workpiece material. Do not force the bit through the workpiece or use it in hand-held drilling without appropriate fixturing.