Sgs 53129 Solid Carbide Jobber Drill Bit 29/64 in

Product Description

The SGS 53129 is a solid carbide jobber length drill bit designed for precision drilling in demanding industrial and machining applications. It features a 29/64-inch (0.4531 inches) diameter, a 150-degree point angle, and a three-flute regular spiral configuration. The micrograin solid carbide construction delivers hardness and wear resistance far beyond high-speed steel, making it suitable for production drilling in tough materials. The bright, uncoated finish maintains sharp cutting geometry without added coating thickness. At 4.75 inches overall length with a 3-inch flute length, it fits standard jobber-length toolholders and drill chucks. A tapered web with web thinning reduces thrust load and improves chip evacuation at the entry point.

This drill bit is intended for use in CNC machining centers, manual mills, and drill presses where consistent hole quality is required. Primary workpiece materials include cast iron, hardened steel, non-ferrous metals, and general steel. The straight cylindrical shank allows direct chucking in standard drill chucks or collet-style toolholders. It is well suited for tool-and-die shops, production machining floors, and maintenance departments working with hard or abrasive materials that would wear conventional high-speed steel bits prematurely. This is a single-piece unit sold individually.

Key Features

• Micrograin solid carbide construction for hardness and extended tool life in abrasive materials
• 150-degree point angle with web thinning reduces entry thrust and improves centering
• Three-flute regular spiral design improves chip flow compared to standard two-flute geometry
• Bright, uncoated finish maintains true diameter tolerance of -0.0005 to 0.0000 inches
• Straight cylindrical shank compatible with standard drill chucks and collet holders
• Conforms to DIN 6539 standard for carbide jobber drills

Compatibility

Designed as a jobber-length drill bit for use in standard drill chucks and collet toolholding systems that accept a 0.4531-inch straight cylindrical shank. Suitable for CNC and manual machine tool setups drilling cast iron, hardened steel, non-ferrous metal, and steel per the SGS Series 103 specification.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician familiar with carbide tooling. Secure the straight shank firmly in a drill chuck or collet to the full rated grip depth before running the spindle. Carbide is brittle compared to high-speed steel — avoid lateral loading, interrupted cuts without appropriate feed parameters, and hard impacts that can chip the cutting edge. Confirm spindle speed and feed rate are appropriate for the workpiece material and drill diameter before beginning the cut; consult published carbide drilling data for the specific material grade.