Chicago-latrobe 48414 Screw Machine Drill Bit 0.086 in

Product Description

The CHICAGO-LATROBE 48414 is a screw machine length drill bit designed for high-speed steel cutting in ferrous metals including cast iron and steel. At 0.086 inches in diameter (Wire Size 44), this bit features a 135-degree split point for fast penetration with reduced walking and less feed pressure. The shortened screw machine length provides rigidity in CNC machining centers, turret lathes, and drill press work where stub-length tooling is required. A web-thinned, parallel-web construction maintains cutting efficiency without sacrificing edge stability. This bit suits machinists, maintenance technicians, and metalworking tradespeople who need reliable, repeatable hole production in production or job-shop environments.

The 48414 is suited for drilling cast iron and steel in production machining, maintenance, and fabrication applications. The screw machine (stub) length reduces deflection during close-tolerance drilling operations and is well matched to turret lathes, screw machines, drill presses, and hand-held power tools where shorter tool stick-out is preferred. The right-hand spiral flute evacuates chips efficiently during through-hole and blind-hole drilling. It is typically used when standard jobber-length bits introduce too much flex or chatter on small-diameter holes.

Key Features

• 0.086 inches (Wire Size 44) diameter with a tight tolerance of +0.0000 to -0.0005 inches for precise hole sizing
• 135-degree split point reduces center-walking and lowers required feed force on hard materials
• Web-thinned, parallel-web design maintains cutting edge strength while improving chip clearance
• High-speed steel construction with coating for extended tool life on cast iron and steel workpieces
• Screw machine (stub) length adds rigidity and reduces deflection in tight-clearance setups
• Right-hand, 2-flute regular spiral flute geometry supports efficient chip evacuation

Compatibility

Designed as an OEM-style replacement and standard production tooling for screw machine length drill bit applications in cast iron and steel; conforms to NAS 907 specification under NAS and ISO standards.

Installation Notes

This bit is installed by machinists and metalworking technicians in compatible drill chucks, collets, or turret toolholders rated for straight-cylindrical shanks. Ensure the machine is powered off and the spindle is at a full stop before changing tooling. Secure the shank fully in the chuck or collet to prevent pullout during high-feed operations. Refer to the machine tool manufacturer guidelines and applicable OSHA machining safety standards for speeds and feeds appropriate to the workpiece material and hole depth.