Walter-titex 5058447 Jobber Drill Bit 0.85mm Hss

Product Description

The WALTER-TITEX 5058447 is a jobber length twist drill bit designed for precision drilling in metalworking and light industrial applications. Manufactured from high speed steel with an oxide coating, this bit features a 118-degree standard point angle and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. The straight-cylindrical shank measures 0.0335 inches in diameter, matching the 0.85 mm (0.0335 inches) cutting diameter. With a 2-flute regular spiral geometry and an overall length of 1-3/16 inches (30.00 mm), this bit is suited for close-tolerance work in ferrous materials. Licensed HVAC, plumbing, and mechanical tradespeople as well as machinists and maintenance technicians regularly use bits in this size range for pilot holes and precision through-hole drilling.

The 5058447 is rated for use in cast iron and steel workpieces and performs well in blind hole and stack drilling applications. The 8xD flute-to-diameter ratio supports a maximum drilling depth of 0.343 inches (8.70 mm), making it appropriate for shallow to moderate-depth holes in sheet metal, plate stock, and structural components. This is a single-piece package sold in minimum order increments of 10 units, consistent with toolroom replenishment purchasing. Oxide coating provides mild lubricity and corrosion resistance during storage and use.

Key Features

• 0.85 mm (0.0335 inches) cutting diameter with h8 diameter tolerance for close-fit applications
• High speed steel construction with oxide finish for extended tool life in ferrous materials
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• 2-flute regular spiral geometry supports chip clearance in blind hole and stack drilling
• Maximum drilling depth of 0.343 inches (8.70 mm) at an 8xD flute-by-diameter ratio
• Meets ANSI and ISO standards; specification designation per BS and DIN

Compatibility

Designed for drilling cast iron and steel workpieces; suitable for blind hole and stack drilling operations in general-purpose metalworking and maintenance applications. Part of the WALTER-TITEX Series A1211 jobber length drill line covering the 0.00 to 2.00 mm diameter range.

Installation Notes

This drill bit is intended for use by machinists, tool-and-die technicians, and qualified maintenance tradespeople using standard drill presses, CNC machining centers, or hand drills with appropriate chuck capacity for small-diameter tooling. Secure the straight-cylindrical shank firmly in the chuck before operation and verify the spindle speed is appropriate for the workpiece material and bit diameter. Do not exceed the maximum drilling depth of 0.343 inches without retracting to clear chips. Inspect the cutting edges for wear or chipping before each use; high speed steel bits in sub-millimeter diameters are susceptible to breakage under lateral load or excessive feed pressure.