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B&Q£19.15Visit shop B&Q - 1/4" X 20 Unc Imperial Thread Repair Kit Helicoil Set For Damaged Threads 14Pc
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This professional Imperial Thread Repair Kit (1/4" X 20 UNC) is designed for mechanics and DIY enthusiasts who need to repair damaged or stripped internal threads. Its key benefit is creating a stronger, more durable thread than the original, particularly in soft materials. A minor caveat is that it requires precise execution for optimal results. The kit offers a permanent solution for worn or corroded threads using stainless steel inserts.
| Model Part Number | 1/4" X 20 UNC |
|---|---|
| Brand | AB Tools |
'1/4"' refers to the nominal diameter of the screw (1/4 inch), and '20 UNC' indicates that there are 20 threads per inch on a Unified National Coarse thread.
While the stainless steel inserts are strong, the kit is primarily designed for softer metals and materials where threads are more susceptible to damage. Using it on extremely hardened steel may require specialized drilling and tapping techniques.
The kit includes a specific HSS drill bit designed for the 1/4" x 20 UNC inserts. Using the provided drill bit is crucial for the correct thread fit.
Stainless steel offers excellent corrosion resistance, high tensile strength, and durability, preventing the inserts from rusting or degrading over time and providing a robust thread.
The kit is designed for professional use but is relatively straightforward. Following the instructions carefully and practicing on scrap material can help beginners achieve good results.
The kit comes with 10 x 1/4 x 20 UNC inserts, allowing for up to 10 repairs of this specific thread size. The tools themselves are durable and designed for repeated use.
Ensure the drill bit is sharp and rotating at the correct speed. Apply steady pressure. Use cutting fluid if necessary, especially in metal applications.
Make sure the tap is aligned perfectly straight with the drilled hole. Use a tapping fluid and rotate the tap with short, back-and-forth motions to clear chips.
Verify that the hole was drilled to the correct size and tapped properly. Ensure the insert is properly seated on the installation tool.
Ensure the tang is positioned correctly in the tool. Apply firm, direct pressure. If stubborn, a light tap with a hammer on the tool may be needed.
Setup:
Compatibility:
This kit is specifically designed for 1/4" x 20 UNC thread sizes. It is most effective in soft materials such as aluminum, mild steel, cast iron, and plastics where threads are prone to wear or damage.
Care:
Keep all components clean and dry when not in use. Store the kit in its original blow-molded case to prevent loss or damage to the tools and inserts. Periodically check inserts for any signs of wear or damage. Clean tools with a dry cloth after use.
