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This Dormer M5 plug tap and drill bit set is for machinists and DIYers needing to create M5 threads efficiently and accurately. Its key benefit is combining two essential tools in one package, saving time and reducing errors. A potential caveat is that it's designed for specific materials and threading depths, requiring users to understand its limitations for optimal performance.
| Model Part Number | L000E500M5NO3XA002 |
|---|---|
| Brand | DORMER |
The plug tap is designed for threading up to 1.5 times its diameter, which for an M5 tap means a maximum threading depth of approximately 7.5mm.
The split-point design allows for self-centering and good accuracy, but for optimal results and cleaner holes, especially in harder materials, a pilot hole is often recommended.
The Titanium Nitride (TiN) coating increases the surface hardness of the drill bit, improves lubricity, reduces friction and heat, leading to significantly longer tool life and better performance.
A plug tap (or second tap) has a tapered end with fewer threads and is suitable for starting threads in through or blind holes. A bottoming tap has an almost straight end with more threads and is used to finish threads at the bottom of a blind hole.
The drill bit is suitable for steel, stainless steel, cast iron, ceramics, plastics, and many other materials due to its HSS construction and TiN coating.
After each use, clean both tools with a brush to remove debris. Apply a light coat of oil to prevent rust and store them in a dry environment.
Yes, the set is manufactured to DIN and BS standards and features a split-point drill bit for accuracy, making it suitable for many precision engineering tasks.
Ensure you are using the correct drill size for the tap. Use adequate lubrication (cutting fluid). Avoid forcing the tap; back it out periodically to clear chips, especially in blind holes. Ensure the workpiece is securely held.
Check if the drill bit is sharp. Ensure you are using the correct drilling speed and applying sufficient pressure. Use cutting fluid to cool the bit and flush away material.
Verify that the hole is drilled to the correct depth and diameter. Ensure the tap is entering the hole straight. Use sufficient lubrication. Clean swarf from the tap flutes regularly.
This is often due to chip buildup or incorrect entry. Back the tap out slightly to clear chips. Ensure the tap is perpendicular to the hole. Apply more cutting fluid.
To use the DORMER HSS Duo M5 set, first select the appropriate drill size for an M5 thread, which is typically a 4.2mm drill bit for standard threads (though consult a thread chart for specific material applications). Use a drill press or hand drill to create a pilot hole to the recommended depth. Apply appropriate cutting fluid to both the drill bit and the tap to reduce friction and heat. Insert the tap into a tap wrench or a compatible drill chuck designed for tapping. Begin threading by applying steady downward pressure and rotating the tap clockwise. For blind holes, back the tap out periodically (a quarter turn counter-clockwise) to break the chip and prevent binding. Clean the tap flutes regularly to remove swarf. The drill bit is compatible with standard drill chucks, and the tap is designed for use with standard tap wrenches. After use, clean both the tap and drill bit with a wire brush and a light oil to prevent rust and corrosion. Store them in a dry place, preferably in their original packaging or a tool case.
