Walter-titex 5058392 Jobber Drill Bit 0.3mm Hss A1211

Product Description

The WALTER-TITEX 5058392 is a jobber-length twist drill bit designed for precision drilling in ferrous materials. Built from high-speed steel (HSS) with an oxide coating for added lubricity and surface protection, this bit has a 0.3 mm diameter (0.0118 inches) and a 118-degree standard point angle with web thinning for reduced thrust on entry. The overall length is 19 mm (0.75 inches), with a 3 mm flute length and a straight-cylindrical shank. The tapered web and web-thinned geometry support clean starts and efficient chip evacuation in tight drilling applications. It is suited for HVAC fabrication shops, industrial maintenance techs, and machinists working with small-diameter through or blind holes.

The 5058392 is rated for primary use in cast iron and steel workpiece materials (material codes K and P). Typical applications include blind hole drilling and stack drilling operations where precise, small-diameter entry is required. The Series A1211 designation places this bit within a general-purpose HSS line built to ANSI, ISO, BS, and DIN standards. With a flute-to-diameter ratio of 8xD and a maximum drilling depth of 2.50 mm (0.098 inches), this bit is optimized for shallow, controlled cuts in production or maintenance environments.

Key Features

• 0.3 mm diameter (0.0118 inches) with h8 diameter tolerance for tight fitment accuracy
• 118-degree standard point angle with web thinning and tapered web for reduced entry thrust
• High-speed steel construction with oxide coating for surface protection and reduced friction
• Right-hand cut, regular spiral flute with 2 flutes for efficient chip removal
• Straight-cylindrical shank for use with standard drill chucks and collets
• Rated for blind hole and stack drilling in cast iron and steel (ISO material codes K and P)

Compatibility

Designed as an OEM-style general-purpose jobber drill bit for use in standard drill chucks and collets accepting a 0.0118-inch straight-cylindrical shank, compatible with cast iron and steel workpiece materials per ISO material codes K and P.

Installation Notes

Installation and use should be performed by a qualified machinist or industrial maintenance technician. Secure the straight-cylindrical shank firmly in a properly sized drill chuck or collet before operation. At 0.3 mm, this bit is extremely fine and susceptible to breakage under lateral load or excessive feed pressure — use appropriate low-feed, high-speed settings for the workpiece material. Do not use this bit on materials outside its rated workpiece material codes without verifying suitability.