Sgs 51212 Jobber Length Drill Bit Letter L Solid Carbide

Product Description

The SGS 51212 is a jobber length drill bit sized to Letter L (0.290 decimal inch / 7.37 mm), designed for precision hole-making in demanding materials where carbide tooling is required. Built from micrograin solid carbide with a bright uncoated finish, this bit delivers the hardness and edge retention needed for production drilling in cast iron, hardened steels, and abrasive composites. The 118-degree faceted point and web-thinned, tapered web geometry reduce entry force and improve chip evacuation. Machinists, tool-and-die workers, and maintenance professionals in fabrication and manufacturing environments rely on this class of tooling for consistent, repeatable hole quality.

The SGS 51212 suits applications where tight hole tolerances and tool longevity are priorities. Its jobber length profile - 3.5 inches overall with a 2.125-inch flute length - fits standard drill chucks and CNC toolholders without extension. The 5xD flute-to-diameter ratio provides adequate chip clearance for moderate-depth holes. This bit is suited for use in drill presses, CNC machining centers, and handheld pneumatic or electric drills where a straight cylindrical shank is compatible. It conforms to DIN 338 standards for jobber length drill geometry.

Key Features

• Micrograin solid carbide construction for hardness and wear resistance in abrasive materials
• 118-degree faceted drill point with web-thinned tapered web for reduced thrust and cleaner entry
• Bright uncoated finish - no coating buildup risk; suitable for re-grinding
• Right-hand cut, 2-flute spiral design promotes efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks and collets without adapters
• Conforms to DIN 338 jobber length standard for dimensional consistency

Compatibility

Designed as an OEM-style jobber length drill bit conforming to DIN 338 standards, compatible with any drill chuck or straight-shank collet accepting a 0.290-inch diameter shank.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with carbide tooling requirements. Secure the shank fully in the chuck or collet before operation, and confirm the drilling machine spindle speed is appropriate for carbide tooling in the target material. Carbide bits are brittle compared to high-speed steel - avoid side loads, interrupted cuts without proper setup, or dropping the tool on hard surfaces. Power down and lock out the machine before changing tooling per applicable safety procedures.