Thread Repair Kits, 30 x 3,5 - 1,5D

• Repair one specified internal thread size with a matched service kit for workshop and field use.
• Restore threads in housings, covers, and machine parts instead of replacing the whole component.
• Support maintenance, installation, and small batch rework with a ready to use insert system.
• Use where durable internal thread function is required after damage, wear, or pull out.

Note Check that the repair size in the kit matches the original thread designation before drilling and STI tapping.

• Matched repair components reduce setup effort for the specified thread size.
• Practical for maintenance and service jobs where speed and completeness matter.
• Restores thread function while keeping the original fastening size in service.
• Portable kit format helps storage and jobsite handling.

• The kit is limited to the single thread size and insert length stated in the product name.
• It is aimed at professional repair steps rather than casual use without thread preparation knowledge.

1. Confirm that the damaged thread matches the kit designation shown in the product name.
2. Prepare the hole for the repair sequence and keep the drilling axis aligned to the original thread position.
3. Cut the required STI mounting thread with the tap from the repair system.
4. Clean the threaded hole thoroughly so the insert can seat without obstruction.
5. Install the wire thread insert with the matching tool from the kit until the seating position is correct.
6. Finish the insert according to the system method and verify the fit with the intended mating fastener.

• 1x STI-Taps, set of 2 pcs., HSS-G, 30 x 3.5 VÖLKEL 03054
• 10x Wire thread inserts - type S - free running M 30 x 3.5 – 1.5
• 1x Inserting tool with Hexagon Drive, 30 x 3.5 VÖLKEL 08029

• Product type: Thread repair kit
• Insert length: 1,5D
• Standard: DIN 8140
• Included groups: installation tools and wire thread inserts

How do you choose the correct repair kit?

Match the damaged thread exactly to the thread designation and insert length shown in the product name. The kit is size specific, so correct identification is the first step.

What is the main advantage of a repair kit over separate purchasing?

The kit keeps the essential repair components grouped for one thread size, which reduces setup effort and lowers the risk of combining mismatched parts.

Can you use the kit for maintenance work on site?

Yes, provided the job allows the required drilling, STI tapping, and insert installation steps with proper control and access.

Where can you read more about the repair system concept?

Technical information V-COIL thread repair as PDF

What must you check before you begin the repair?

Check thread designation, hole accessibility, remaining wall condition, and whether the damaged area can be prepared cleanly for the STI thread.

Where can you find the full thread repair catalog?

VC 23 catalog as PDF

Does the repair keep the original thread system in service?

That is the aim of the system. After proper installation, the mating fastener should return to the original thread designation specified for the component.