Osg 61590 Screw Machine Drill Bit 0.3543 in Hss

Product Description

The OSG 61590 is a screw machine length drill bit designed for high-performance metal drilling in production and maintenance environments. The bit measures 9.00 mm (0.3543 inches) in diameter with a 120-degree faceted point angle and a web-thinned, tapered web configuration that reduces thrust and improves centering. Built from high speed steel (HSS) with a coated finish, this bit is engineered for right-hand cut operation with a regular spiral flute profile. The straight-cylindrical shank measures 10.00 mm and fits standard drill chucks. It is installed by machinists, tool and die workers, and maintenance technicians working in light manufacturing, metalworking shops, and industrial maintenance settings.

This screw machine length drill bit is suited for drilling into steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpiece materials. The shorter screw machine length body offers increased rigidity compared to jobber-length bits, making it a reliable choice for close-tolerance hole production on drill presses, CNC machining centers, and manual lathes. The flute-to-diameter ratio is 5xD, and the two-flute spiral design promotes chip evacuation during through-hole and blind-hole operations.

Key Features

• 9.00 mm (0.3543 inch) cutting diameter with a tolerance of +0 to -0.022 mm
• 120-degree faceted point angle with web thinning for reduced entry thrust
• High speed steel construction with coated finish for extended tool life
• Straight-cylindrical shank (10.00 mm) for positive chuck engagement
• Screw machine length body for added rigidity in production drilling
• Coolant-through: No — suited for conventional flood or dry cutting setups

Compatibility

Designed for use in standard drill chucks and collet holders accepting a 10.00 mm straight-cylindrical shank. Compatible workpiece materials include steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate per OSG Series 1100 specifications.

Installation Notes

This bit is installed by machinists and tooling technicians using standard drill chucks or collet systems on drill presses, mills, or CNC spindles. Ensure the machine spindle is fully stopped and locked out before changing tooling. Verify chuck or collet bore matches the 10.00 mm shank diameter before tightening. Apply appropriate cutting fluid or dry-cut per the workpiece material requirements and shop practice.