Osg 61605 Screw Machine Drill Bit 0.4134 in Hss

Product Description

The OSG 61605 is a screw machine length drill bit designed for high-performance metal drilling in industrial and trades applications. Built from high speed steel with a coated finish, this bit features a 120-degree faceted point and a web-thinned, tapered web construction that reduces entry force and improves centering. At 0.4134 inches (10.50 mm) in diameter, it runs a right-hand spiral flute pattern with a 2-flute configuration. The shorter screw machine length body provides added rigidity compared to jobber-length bits, making it well suited for drilling in tight spaces and on production machines where runout and deflection must be minimized.

The OSG 61605 is intended for use on steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate workpieces. It is a practical choice for machinists, tool-and-die technicians, and maintenance mechanics running drill presses, CNC machining centers, turret lathes, or manual production equipment. The screw machine length format fits standard drill chucks and collet holders accepting a 12.00 mm (approximately 0.4724 inches) straight cylindrical shank. It is rated as a high-performance grade bit, appropriate for production drilling cycles where tool life and dimensional consistency matter.

Key Features

• High speed steel construction with coated finish for improved wear resistance and heat management
• 120-degree faceted drill point for accurate self-centering on flat and curved metal surfaces
• Web-thinned tapered web reduces thrust force and improves chip evacuation
• 2-flute regular spiral design with spiral flute geometry optimized for Series 1100 performance standards
• Screw machine length body (100.00 mm overall, approximately 3.937 inches) provides greater rigidity than jobber-length bits
• Diameter tolerance of plus 0 to minus 0.027 mm ensures consistent hole sizing within tolerance

Compatibility

Designed for use in drill presses, CNC machining centers, turret lathes, and other equipment accepting a straight cylindrical shank. Suitable for workpiece materials including steel, stainless steel, aluminum, aluminum alloy, and aluminum silicate. Fits within the 0.4000 to 0.4500 inch (9.50 to 11.00 mm) drill bit size range for standard tooling setups.

Installation Notes

Installation and tool changes should be performed by qualified machinists or maintenance technicians with the machine powered down and properly locked out per applicable OSHA lockout/tagout procedures. Secure the straight cylindrical shank fully in the chuck or collet before operation and verify runout with a dial indicator if tight tolerances are required. Do not exceed the spindle speed and feed rate recommendations appropriate for the workpiece material and bit diameter. Inspect the cutting edges and coating condition before each use and replace the bit if chipping, excessive wear, or dulling is observed.