Cobalt-containing High Speed Steel Titanium Spot Drill for Accurate Metal Spotting

This spot drill is designed for machinists and metalworkers who need precise hole positioning before drilling. Made from cobalt-containing high speed steel with a titanium coating, it combines hardness and wear resistance to reduce bit wander on steel surfaces. Available in 11 diameters from 3mm to 20mm, each with a straight shank for universal chuck or collet fitting, and external cooling for heat management. This tool is a practical choice for repetitive spotting tasks in workshop and industrial settings, based on the manufacturer's specifications.

Features and Construction

The spot drill is built from cobalt-containing high speed steel, known for its increased hardness and heat resistance compared to standard HSS. The titanium coating further reduces friction during cutting, helping to maintain edge sharpness over multiple uses.

Material and Build

The base material is cobalt-containing high speed steel, which provides improved red hardness and edge retention. The titanium surface treatment is applied to lower friction and enhance wear resistance, making the tool suitable for spotting on steel and other ferrous materials.

Size and Practical Fit

Each spot drill has a straight shank for secure fitting in collets and drill chucks. Available diameters are 3, 4, 5, 6, 8, 10, 12, 16, 18, and 20mm. The blade size is 20mm, and the maximum depth of cut is 20mm, allowing for standard spotting depths.

Uses and Placement

This spot drill is intended for machine tool use, typically in drill presses, milling machines, or CNC equipment. It creates a small conical recess that guides a follow-on drill bit, preventing wander and improving hole location accuracy.

Metalworking Shops

In job shops, this tool speeds up workpiece setup by allowing the operator to quickly spot holes on steel plates, brackets, and structural parts. The cobalt HSS construction withstands repeated spotting without rapid dulling.

DIY and Professional Workshops

For hobbyist machinists and professional fabricators, the straight shank fits standard drill chucks. The external cooling type works with conventional flood coolant or mist systems to keep temperatures under control.

Benefits and Buying Value

Using a dedicated spot drill improves final hole quality by ensuring the secondary drill follows a true path. The cobalt-containing HSS and titanium coating extend tool life compared to standard HSS, reducing the frequency of resharpening or replacement.

Reuse and Low Maintenance

The tool's hard surface resists abrasion during spotting, so it can be used repeatedly without immediate edge deterioration. Periodic resharpening is possible, though no specific intervals are provided by the manufacturer.

Why Choose This Product

This spot drill offers a direct specification match for common spotting tasks on steel, with a wide size range and a material composition suited to moderate-duty metalworking. It provides a reliable, non-specialised solution for accurate hole placement.