Osg 8595594 Screw Machine Drill Bit 0.2339 in Hss

Product Description

The OSG 8595594 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 120-degree faceted point angle and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. The straight-cylindrical shank measures 6.00 millimeters in diameter, and the overall length is 72.00 millimeters (approximately 2.83 inches). With a 2-flute regular spiral design and a flute length of 28.00 millimeters, the 8595594 is suited for machinists and metalworking tradespeople running screw machine or turret lathe setups where short, rigid tooling is required.

This drill bit is rated for use in steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpiece materials. The screw machine length format provides a shorter, stiffer profile than jobber-length bits, making it the preferred choice for CNC machining centers, drill presses, and screw machines where rigidity and positional accuracy are priorities. The 5xD flute-to-diameter ratio supports deeper hole applications within the short-length format. The coated finish extends tool life when drilling abrasive or work-hardening materials.

Key Features

• High speed steel construction with coated finish for extended tool life
• 120-degree faceted point angle with web-thinned, tapered web for reduced entry thrust
• 2-flute regular spiral design for efficient chip removal
• Straight-cylindrical shank compatible with standard drill chucks and collet systems
• Screw machine length profile provides increased rigidity over jobber-length bits
• Rated for steel, stainless steel, aluminum, and aluminum alloy workpieces

Compatibility

Designed as an OEM-style replacement or direct tooling selection for screw machines, CNC machining centers, turret lathes, and drill presses accepting a 6.00-millimeter straight-cylindrical shank. Fits standard drill chucks and collet holders in the 0.2000-to-0.2500 decimal inch size range.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's setup procedures. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Confirm chuck or collet runout is within acceptable tolerance before running, as excessive runout accelerates wear on HSS tooling. Follow applicable OSHA machine guarding requirements when operating drilling equipment.