Chicago-latrobe 48722 Screw Machine Drill Bit 0.157 in Hss

Product Description

The CHICAGO-LATROBE 48722 is a screw machine length drill bit designed for general-purpose drilling in metal fabrication and machining environments. Built from high speed steel with a bright/uncoated finish, it measures 0.157 inches in diameter (wire size #22) with a 118-degree standard point angle. The shorter screw machine length body — 2.125 inches overall — improves rigidity and reduces deflection in applications where stub-length reach is preferred. The two-flute spiral design with web thinning promotes efficient chip evacuation and cleaner hole entry. Machinists, tool and die technicians, and general fabrication trades use this bit in drill presses, CNC machines, and hand-held power tools.

The 48722 is suited for drilling cast iron, non-ferrous metals, and steel in production and job-shop settings. The straight cylindrical shank fits standard drill chucks without modification. The screw machine length profile makes it a practical choice for setups requiring maximum tool rigidity and minimal runout, including work in tight fixtures or shallow-depth applications where a standard-length bit would introduce excess flex. It conforms to ISO standards and carries a general-purpose grade designation appropriate for a broad range of metalworking tasks.

Key Features

• High speed steel construction for durability in ferrous and non-ferrous metal drilling
• 118-degree standard point angle for general-purpose hole starting without a center punch in most setups
• Web-thinned point reduces thrust load and improves penetration on harder materials
• Screw machine (stub) length of 2.125 inches overall for improved rigidity over standard-length bits
• Bright/uncoated finish with right-hand spiral flute for straightforward chip removal
• Diameter tolerance of +0.0000 to -0.0007 inches ensures consistent hole sizing

Compatibility

Designed for use with standard drill chucks accepting straight cylindrical shanks; suitable for drilling cast iron, non-ferrous metals, and steel across general-purpose metalworking applications.

Installation Notes

Installation and use should be performed by qualified machinists or trained trade professionals familiar with metalworking equipment. Secure the workpiece firmly before drilling and confirm chuck engagement on the straight shank before applying power. Operate at feed rates and spindle speeds appropriate for the workpiece material and bit diameter to avoid premature tool wear or breakage. Ensure cutting fluid or coolant is applied where material hardness or sustained drilling cycles require it, noting this bit does not support through-coolant delivery.