The Wiseman Threading Tools Bottom Lead Metric HSS Tap, Right Hand - M22x1.25 is a purpose-built threading instrument designed for reliable, repeatable metric threading in metalworking projects. Crafted from high-speed steel and ground for precision, this uncoated tap targets general-purpose use with ISO 529-compliant dimensions, ensuring compatibility with standard tooling and workpieces.

Key features that matter

• Material and finish: High-speed steel (HSS), precisely ground for accurate thread form; uncoated to tolerate common cutting fluids and to stay robust under varied shop conditions.
• Threading geometry: Right-hand thread with a bottom lead, engineered to engage threads smoothly and to reach near the bottom of the hole in blind drilling applications.
• Size and standard: Metric M22x1.25, manufactured to ISO 529 dimensions for dependable interchangeability with other taps and thread gauges.
• Shank and drive: Square-end shank designed for secure engagement with standard tap wrenches, minimizing slippage during threading.
• Versatile use: General-purpose tap suitable for a range of metals, including steel and cast iron, when paired with proper coolant or cutting oil.

How to get the best results

1. Prepare the hole with an appropriate pilot bore and deburr the entry to ensure clean engagement.
2. Apply a suitable cutting fluid to reduce heat and extend tool life.
3. Align the tap perpendicular to the workpiece and apply steady, clockwise turning force to start the thread.
4. Maintain steady pressure as the threads form, using the bottom lead to approach the bottom of the hole where applicable.
5. Pause to clear chips, then complete the threading to the required depth. Clean the part and inspect thread accuracy.

Ideal use cases and who benefits

Machinists, maintenance technicians, and DIY enthusiasts who regularly create or repair metric threads will appreciate the precision and durability of this M22x1.25 tap. It’s well-suited for manufacturing fixtures, automotive components, hydraulic and pneumatic fittings, and repair tasks where robust, reliable threads are essential.

Why this Wiseman tap stands out

What sets this tool apart is the combination of ISO-compliant geometry, uncoated HSS resilience, and the bottom lead design that promotes deeper thread engagement with controlled start-up. The result is cleaner starts, fewer thread-start frustrations, and consistent thread quality across project runs—especially in blind holes or deeper threads where precision matters most.

Care and maintenance tips

After use, wipe clean and dry the tap, apply a light protective coating or oil to deter corrosion, and store in a dry environment. Use appropriate cutting fluids during tapping to maximize tool life and maintain sharpness for future jobs.