Chicago-latrobe 48375 Screw Machine Drill Bit 0.2055in Hss

Product Description

The CHICAGO-LATROBE 48375 is a screw machine length drill bit designed for high-production drilling in cast iron and steel. Built from high speed steel with a coated finish, it delivers durability in demanding shop and field environments. The 135-degree split point with web thinning reduces thrust and improves self-centering at entry, eliminating the need for a center punch in most applications. At 0.2055 inches (Wire Size 5) in diameter, it fits standard drilling operations where a stub-length bit is preferred for rigidity and reduced deflection. Right-hand cut with a regular spiral flute pattern ensures consistent chip evacuation. This bit is part of the heavy-duty Series 2159 line and conforms to ISO and NAS 907 specifications.

The 48375 is suited for metalworking applications in manufacturing, maintenance, and fabrication settings where screw machine length bits are specified. Its shortened overall length of 2-3/8 inches compared to jobber-length bits provides added stiffness, making it a practical choice for CNC machines, drill presses, and hand-held power drills working in cast iron and steel stock. The parallel web configuration and web-thinned point support clean entry in repetitive production drilling cycles. Machinists, tool-and-die techs, and industrial maintenance crews are the primary users of this bit.

Key Features

• 135-degree split point with web thinning reduces thrust and improves self-centering on entry
• High speed steel construction with coated finish for extended wear resistance
• Screw machine (stub) length body at 2-3/8 inches overall for added rigidity and reduced deflection
• Regular spiral flute with straight-cylindrical shank fits standard drill chucks
• Right-hand cut with parallel web configuration for consistent chip flow
• Meets ISO and NAS 907 standards; diameter tolerance held to +0.0000 to -0.0007 inches

Compatibility

Designed for drilling cast iron and steel workpieces. Primary workpiece materials are cast iron and steel as stated by the manufacturer. Compatible with any drill press, CNC machine tool, or hand-held power drill accepting a straight-cylindrical shank in the 0.2055-inch diameter range.

Installation Notes

This bit is installed and used by machinists and industrial maintenance technicians. Secure the straight-cylindrical shank firmly in the drill chuck before operation and verify chuck key is removed before starting the machine. Use appropriate cutting fluid or coolant when drilling steel to extend bit life, noting this bit does not support through-coolant delivery. Inspect the cutting edges for wear or chipping before each use and replace if the point geometry is compromised.