Chicago-latrobe 48708 Screw Machine Drill Bit 0.199 in

Product Description

The CHICAGO-LATROBE 48708 is a screw machine length drill bit designed for general-purpose drilling in production and maintenance environments. Built from high speed steel with a bright, uncoated finish, it cuts a 0.199-inch diameter hole equivalent to wire size 8. The 118-degree standard point angle suits a wide range of workpiece materials, while the web-thinned tip reduces thrust and improves penetration. The two-flute spiral design evacuates chips efficiently during short-hole drilling operations. At 2.25 inches overall length, this stub-style bit fits into tight clearances where jobber-length bits cannot. Licensed machinists, maintenance technicians, and toolroom operators are the primary users.

This bit is suited for drilling cast iron, non-ferrous metals, and steel in screw machine, CNC, and manual drill press applications. The short flute length of 1.1875 inches and rigid body make it the standard choice when chatter or deflection is a concern in production drilling. The straight-cylindrical shank seats directly in standard chucks and collets without adapters. It falls within the Series 157 line, which covers general-purpose stub-length HSS bits in the 0.1500 to 0.2000 inch diameter range.

Key Features

• 0.199-inch diameter with a tight tolerance of +0.0000 to -0.0007 inches for consistent hole sizing
• High speed steel construction provides durability across cast iron, steel, and non-ferrous workpieces
• Web-thinned, parallel-web tip reduces entry thrust and improves point stability
• 118-degree standard point angle — compatible with conventional drill press and CNC setups
• Screw machine (stub) length body resists deflection in short-hole and production drilling
• Right-hand spiral flute with regular helix promotes reliable chip evacuation

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard three-jaw chucks and collet systems accepting straight-cylindrical shanks. Suitable for drilling cast iron, non-ferrous metals, and steel. Conforms to ISO standards for twist drill geometry.

Installation Notes

Secure the bit firmly in the chuck or collet before operation and verify zero runout before beginning a production run. Always power down and lock out the machine before changing bits. Use appropriate cutting fluid or coolant when drilling steel to extend tool life, noting that this bit does not support through-coolant delivery. Inspect the cutting edges and web area for wear or chipping between uses to maintain hole-size tolerance.