Helicoil Thread Repair Kit | Precision Thread Restoration Solution
The Helicoil Thread Repair Kit is a precision-engineered solution designed to restore damaged, stripped, or worn internal threads back to their original size and strength. By installing a high-quality stainless steel insert, the repaired thread often exceeds the durability of the original material.
This kit is widely used across industries where thread reliability is critical, including automotive repair, aerospace maintenance, machinery manufacturing, and industrial equipment servicing.
Core Features & Advantages
Permanent Thread Restoration
Creates a new, high-strength internal thread that resists wear and stripping.
01
Enhanced Load Distribution
The insert design evenly distributes stress, reducing localized thread failure.
02
Corrosion & Heat Resistance
Stainless steel inserts maintain performance under harsh environments.
03
Cost-Effective Repair Solution
Eliminates the need to replace expensive components.
04
Wide Compatibility
Suitable for aluminum, magnesium, cast iron, and steel materials.
05
Product Structure
Each Helicoil repair kit is systematically configured to ensure efficient installation:
- Precision wire thread inserts
- High-speed steel tap (STI tap)
- Installation tool
- Tang break-off tool
- Drill bit (optional based on kit type)
- Storage case for organized handling
The inserts feature a diamond-shaped wire cross-section, forming a flexible yet durable internal thread after installation.
High-Speed Steel (HSS)
Drill Point Angle: 135°
Thread Angle Range: 35° -50°
|
Thread Size |
Standard |
Drill Bit Size
|
Tap Size
|
Insert Qty
|
|
M5x0.8 |
Metric |
5.2 mm |
M5x0.8 |
6 PCS |
|
M6x1.0 |
Metric |
6.3mm |
M6x1.0 |
6 PCS |
|
M8x1.25 |
Metric |
8.3 mm |
M8x1.25 |
6 PCS |
|
M10x1.0 |
Metric |
10.5 mm |
M10x1.0 |
6 PCS |
|
M10x1.25 |
Metric |
10.5 mm |
M10x1.25 |
6 PCS |
|
M10x1.5 |
Metric |
10.5 mm |
M10x1.5 |
6 PCS |
|
M12x1.25 |
Metric |
12.5 mm |
M12x1.25 |
6 PCS |
|
M12x1.5 |
Metric |
12.5 mm |
M12x1.5 |
6 PCS |
|
M14x1.25 |
Metric |
14.5 mm |
M14x1.25 |
6 PCS |
|
M14x1.5 |
Metric |
14.5 mm |
M14x1.5 |
6 PCS |
|
1/4''-20 |
SAE/UNC |
1/4'' |
1/4''-20 |
6 PCS |
|
5/16''-18 |
SAE/UNC |
5/16'' |
5/16''-18 |
6 PCS |
|
3/8''-16 |
SAE/UNC |
3/8'' |
3/8''-16 |
6 PCS |
|
7/16''-14 |
SAE/UNC |
7/16'' |
7/16''-14 |
6 PCS |
COMPLETE HELICOIL INSTALLATION TOOL SET
This professional kit includes all the essential tools required for accurate and efficient thread repair and insert installation:
DRILL BITS
The 135° split-point drill bits provide precise centering and reduce walking on the work surface. They are especially suitable for drilling into hard materials, ensuring clean and accurate holes for subsequent tapping.
01
SCREW TAPS
High-precision screw taps are designed to match Helicoil insert specifications, guaranteeing accurate thread formation. This ensures a tight and secure fit for the inserts, improving overall thread strength and durability.
02
INSTALLATION TOOLS
The installation tools allow for smooth and controlled insertion of the thread inserts. They ensure the insert is installed straight and sits flush with the workpiece surface for optimal performance.
03
TANG BREAK-OFF TOOLS
After installation, the tang break-off tools enable quick and clean removal of the driving tang. This results in a neat finish and ensures the internal thread is ready for use without obstruction.
04
Wide Material Application
Optimized for Multiple Base Materials
The Helicoil repair system, including precision STI taps and inserts, is engineered to perform reliably across a wide range of materials. This ensures consistent thread quality regardless of the substrate hardness or machining characteristics.
Compatible Materials Include:
- Aluminum
- Iron
- Carbon Steel
- Bronze
- Stainless Steel
- Cast Materials
Key Benefit:
The matched tap and insert design guarantees accurate thread formation and secure installation, minimizing deformation or misalignment during the repair process.
Installation Process
Step-by-Step Thread Repair Procedure
The entire repair process is straightforward and can be completed with minimal training, ensuring efficiency in field or workshop environments.
Drilling
Remove damaged threads using the specified drill size.
Tapping
Create new threads using the dedicated STI tap.
Insert Installation
Use the installation tool to screw the insert into the tapped hole.
Tang Removal
Break off the tang using the provided tool to complete the process.
Why Choose Us
With over 20 years of manufacturing experience in thread repair solutions, we combine advanced production technology with strict quality control systems. Our products are widely exported to Europe, the Middle East, and Asia, serving distributors, OEM manufacturers, and industrial maintenance providers.
- ISO-compliant production system
- Stable global supply capability
- Professional technical support team
- Proven experience in OEM/ODM projects
FAQ
Q1: Is the repaired thread stronger than the original?
A: Yes. Using stainless steel Helicoil inserts provides higher tensile strength and improved wear resistance, often making the repaired thread more durable than the original material.
Q2: Is this repair kit suitable for soft materials like aluminum?
A: Absolutely. It is especially effective for reinforcing threads in soft metals such as aluminum or magnesium, preventing stripping and wear during repeated assembly.
Q3: Can the inserts be removed or replaced if damaged?
A: Yes. Damaged inserts can be safely removed and replaced without affecting the base material, ensuring a long-lasting repair solution.
Q4: Do you support custom sizes or bulk orders?
A: Yes. We provide customization according to international standards (UNC, UNF, Metric) and customer-specific requirements, suitable for industrial, automotive, and aerospace applications.
Q5: Is professional experience required to install the inserts?
A: Not at all. The kit comes with all necessary tools and step-by-step instructions. Skilled technicians or maintenance personnel can complete installation with minimal training.
Q6: What industries or equipment is this kit suitable for?
A: The Helicoil repair kit is widely used in automotive engines, heavy machinery, aerospace components, mold and tooling repair, and electrical housings. It is ideal for environments where threads undergo frequent assembly and disassembly.
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