Osg 215-1590 Drill Bit 0.159 in 135 Deg Solid Carbide

Product Description

The OSG 215-1590 is a solid carbide screw machine length drill bit designed for precision drilling in demanding metalworking applications. It measures 0.159 inches (Wire Size 21, 4.04 mm) in diameter with a 135-degree split point angle and a bright, uncoated finish. The two-flute spiral design with web thinning reduces thrust and improves chip evacuation. At 2.125 inches overall length with a 1.0625-inch flute length, this bit is built for stub-length rigidity and accuracy. A straight-cylindrical shank ensures straightforward chuck mounting. It weighs 0.005 pounds. Licensed HVAC, machining, and metalworking professionals rely on this type of bit for tight-tolerance hole making in production environments.

The OSG 215-1590 is suited for general-purpose drilling in steel, alloy steel, stainless steel, cast iron, aluminum silicate, nickel alloy, titanium, and titanium alloy workpieces. The screw machine (stub) length geometry provides added stiffness compared to jobber-length bits, making it well-suited for CNC machining centers, drill presses, and hand-held pneumatic or electric drills where deflection control matters. The 5xD flute-to-diameter ratio and tapered web configuration support consistent chip flow across a wide range of these materials.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• 135-degree split point angle reduces walking and lowers entry thrust
• Web-thinned, tapered web design improves chip evacuation and reduces cutting force
• Bright, uncoated finish compatible with a broad range of cutting fluids and materials
• Right-hand cut, two-flute spiral geometry for standard CW-rotation spindles
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

OSG Series 215 screw machine length drill bits are designed for use in CNC machining centers, drill presses, and handheld power tools with standard drill chucks accepting a straight-cylindrical shank. This bit is sized for Wire Size 21 applications within the 0.1500 to 0.2000 decimal inch diameter range.

Installation Notes

Install this bit in a compatible drill chuck, collet, or tool holder rated for carbide tooling and tighten securely before operation. Ensure the spindle and workpiece are properly fixtured to minimize vibration, which can chip carbide cutting edges. Apply appropriate cutting fluid for the workpiece material when possible, even though this bit does not have through-coolant capability. Inspect the cutting edges before each use and replace the bit if chipping or wear is detected, as running a damaged carbide drill can damage the workpiece and toolholder.