Osg 10101505 Screw Machine Drill Bit 0.1015 in Cobalt Hss

Product Description

The OSG 10101505 is a screw machine length drill bit designed for high-performance drilling in steel and alloy steel. Built from cobalt high speed steel with a coated finish, it delivers increased heat and wear resistance compared to standard HSS tooling. The bit measures 0.1015 inches in diameter (Wire Size 38) with an overall length of 2.25 inches and a flute length of 0.8125 inches. A 130-degree split point and X-thinned web reduce walking and entry thrust, making this bit well-suited for production and maintenance drilling on metal components. It is installed and used by machinists, tool-and-die technicians, and maintenance mechanics.

This bit is engineered for screw machine length applications where a shorter, stiffer geometry is required to maintain positional accuracy in metal drilling operations. The straight-cylindrical shank seats in standard drill chucks and collets without modification. Primary workpiece materials are steel and alloy steel, making it a practical choice for HVAC equipment fabrication, plumbing rough-in hardware, and general metal trade work where controlled hole size and clean entry are required. The 3xD flute-to-diameter ratio supports chip evacuation in short-depth holes.

Key Features

• Cobalt high speed steel construction for elevated heat resistance in steel drilling
• 130-degree drill point angle with X-thinned web reduces thrust and self-centers on entry
• Screw machine length geometry provides added rigidity and reduced deflection
• Right-hand spiral flute with tapered web configuration for efficient chip evacuation
• Straight-cylindrical shank fits standard drill chucks and collets
• Coated finish extends tool life in high-cycle production environments

Compatibility

Designed for use in standard drill chucks and collets accepting a straight-cylindrical shank. Primary workpiece materials are steel and alloy steel as specified by the manufacturer.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade mechanics familiar with metal cutting operations. Ensure the drill press, hand drill, or CNC spindle is powered down and fully stopped before mounting or removing the bit. Secure the shank fully in the chuck or collet to the proper engagement depth before operation. Use appropriate cutting fluid or coolant when drilling steel to extend tool life, noting that this bit does not have a coolant-through design.