Sgs 51348 Screw Machine Drill Bit 19/64 in Solid Carbide

Product Description

The SGS 51348 is a screw machine length drill bit designed for precision drilling in demanding materials including alloy steels and titanium. Built from solid carbide and coated with Ti-NAMITE-A AlTiN finish, the bit delivers high heat resistance and extended tool life in production machining environments. The 145-degree split point with notched tip and web thinning geometry reduces thrust force and improves chip evacuation at entry. With an overall length of 3.125 inches and a 19/64 inch (0.2969 inch) diameter, this bit is suited for screw machine and short-hole applications where rigidity and positioning accuracy matter. It is installed and operated by machinists and CNC tooling professionals.

The SGS 51348 is applied in short-hole drilling operations on alloy steel and titanium workpieces, typical in production machining, aerospace component work, and precision fabrication shops. The screw machine length format provides a stiffer setup than jobber-length bits, reducing deflection in close-tolerance bores. Maximum drilling depth is 1.000 inch, making it appropriate for through-holes and blind holes within that range. The straight shank seats in standard drill chucks and collet holders without modification.

Key Features

• Solid carbide construction for rigidity and heat resistance in hard materials
• Ti-NAMITE-A AlTiN coating reduces friction and extends tool life in alloy and titanium applications
• 145-degree notched split point with web thinning lowers entry thrust and self-centers on the workpiece
• Screw machine length (3.125 inches OAL) provides greater stiffness than jobber-length equivalents
• Right-hand cut with regular spiral flutes for consistent chip flow
• Diameter tolerance of plus 0.0002 to plus 0.0008 inches supports close-tolerance bore requirements

Compatibility

Designed as a direct-fit replacement or standard tooling selection for setups requiring a 19/64 inch (0.2969 inch) diameter, straight-shank screw machine length drill bit in the SGS Series 135 line. Compatible with standard drill chucks and collet holders accepting a 0.3125 inch straight shank.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with carbide tooling requirements. Ensure the shank is fully seated and clamped in the chuck or collet before spindle engagement. Solid carbide bits are brittle compared to high-speed steel — avoid side loading, interrupted cuts without proper setup, or dropping the tool on hard surfaces. Follow machine manufacturer feed and speed recommendations for the workpiece material and bit diameter; no specific values are provided here.