Chicago-latrobe 48743 Screw Machine Drill Bit Hss

Product Description

The CHICAGO-LATROBE 48743 is a screw machine length drill bit designed for high-speed steel cutting in general-purpose drilling applications. At 0.089 inches (wire size 43) in diameter, this bit features a standard 118-degree point angle, a right-hand spiral flute, and a straight-cylindrical shank. The shortened screw machine length body provides added rigidity compared to jobber-length bits, reducing deflection in close-tolerance drilling work. The bright uncoated HSS construction suits a wide range of ferrous and non-ferrous workpiece materials. Machinists, tool-and-die technicians, and maintenance trades reach for this bit when precision hole placement and runout control matter.

This bit is suited for drilling cast iron, non-ferrous metals, and steel in machine shop, production, and maintenance environments. The screw machine length format is a common choice for drill press and lathe work where tool overhang must be minimized. The parallel web configuration and web-thinned geometry help reduce thrust force at entry, making it practical for accurate hole starts in metal plate, structural stock, and machined components.

Key Features

• Wire size 43 (0.089 inches) diameter with a tight tolerance of +0.0000 to -0.0005 inches
• 118-degree standard point angle for general-purpose metal drilling
• Screw machine length body for increased rigidity and reduced deflection
• Web-thinned, parallel web geometry reduces entry thrust force
• Right-hand cut, 2-flute spiral design for efficient chip evacuation
• Bright uncoated HSS construction compatible with cast iron, steel, and non-ferrous metals

Compatibility

Designed as a general-purpose screw machine length drill bit rated for use in cast iron, non-ferrous metal, and steel workpieces. Fits any standard drill press, lathe tailstock, or machine tool chuck accepting a straight-cylindrical shank at 0.089 inches diameter.

Installation Notes

Installation and use of this bit should be performed by machinists or qualified trade professionals familiar with metal-cutting drill operations. Secure the straight-cylindrical shank firmly in the chuck before operation and verify concentricity to minimize runout. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole tolerance. Follow all machine tool manufacturer guidelines and applicable shop safety procedures when operating drilling equipment.