Sgs 54811 Solid Carbide Jobber Drill Bit Letter F

Product Description

The SGS 54811 is a solid carbide jobber-length drill bit sized to Letter F (0.257 inches / 6.53 mm) with a 124-degree notched point angle and a titanium diboride (TiB2) finish. It features a three-flute, right-hand spiral design with a straight cylindrical shank, giving it a 5xD flute-to-diameter ratio suited for high-performance drilling applications. The overall length is 3.583 inches (91.00 mm), with a flute length of 2.087 inches (53.00 mm) and a maximum drilling depth of 1.693 inches (43.00 mm). This bit is part of SGS Series 131N and is intended for installation by machinists, tool-and-die technicians, and precision metalworking professionals who require tight-tolerance hole production.

The SGS 54811 is designed for high-performance drilling in demanding materials where solid carbide construction and a TiB2 coating deliver superior wear resistance and thermal stability. The notched point reduces thrust and improves chip evacuation at entry. The 8.00 mm straight cylindrical shank fits standard drill chucks and collet holders used in CNC machining centers, drill presses, and manual mills. It is suited for applications in automotive, aerospace, and general precision metalworking environments where consistent hole geometry and diameter tolerance are critical.

Key Features

• Solid carbide construction for rigidity and extended tool life in hard or abrasive materials
• Titanium diboride (TiB2) coating reduces friction and improves surface finish at the cutting edge
• 124-degree notched point reduces entry thrust and promotes self-centering
• Three-flute spiral design improves chip evacuation compared to standard two-flute geometry
• Diameter tolerance of +0.006 to +0.021 mm supports precision hole sizing
• 5xD flute-to-diameter ratio provides additional reach for deeper hole applications

Compatibility

Designed as a direct-fit replacement or standard tooling selection for any drill chuck or collet holder accepting an 8.00 mm straight cylindrical shank, compatible with CNC machining centers, drill presses, and milling machines requiring a Letter F jobber-length drill bit.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with carbide cutting tools. Secure the shank fully in the collet or chuck to the recommended engagement depth before operation. Carbide tooling is brittle and susceptible to chipping from side-loading or impact - avoid using carbide drill bits in hand-held portable drills. Confirm spindle speed and feed rate are appropriate for the workpiece material and drill diameter before beginning the cut.