VÖLKEL Thread Repair Kit V-COIL notch M 4 x 0.7 – 1.5 D

You use this V-COIL thread repair kit for repairing an internal M 4 X 0.7 thread with a coordinated repair workflow. The kit logic is selected by original thread size, insert length stated in the title, and whether the repair is a standard, rapid, or notch version.

VÖLKEL Thread Repair Kit V-COIL notch M 4 x 0.7 – 1.5 D

Features and applications

You use this V-COIL thread repair kit for repairing an internal M 4 X 0.7 thread with a coordinated repair workflow. The kit logic is selected by original thread size, insert length stated in the title, and whether the repair is a standard, rapid, or notch version.

M identifies ISO metric thread notation, where nominal diameter and pitch define the matching thread. The kit is for internal thread repair, while external thread correction requires a die or a different process.

Applications

• for repairing damaged internal threads with the original designation M 4 X 0.7
• for V-COIL repair workflows using coordinated preparation and insert installation steps
• for maintenance, repair workshop, field service, and mechanical engineering use for selecting a complete repair route by thread size and insert length

Benefits

• Kit format supports a coordinated thread repair workflow for one original thread size.
• Thread designation M 4 X 0.7 keeps repair selection tied to the damaged internal thread.
• Insert length in the title supports repair planning where the length is specified.
• Process structure helps separate drilling, STI tapping, insert installation, and final checking.

Application limits

• A repair kit still requires correct sequence and alignment, so do not skip component checks before starting the repair.

Step by step

1. Identify the damaged internal thread as M 4 X 0.7.
2. Check that the repair kit variant matches the repair requirement.
3. Prepare the hole according to the repair sequence.
4. Cut the STI receiving thread with the matching tap.
5. Clean the prepared receiving thread.
6. Install the wire thread insert with the suitable inserting tool.
7. Remove the tang where the selected system requires it.
8. Inspect the repaired thread before reassembly.

Used together with

Each component in the kit has its own VÖLKEL item number for reordering.

• STI HexTap V-COIL rapid machine tap Form D HSS-G - M 4 x 0.7: item 03092
• V-COIL rapid STI-Twist Drill, 4.2 mm: item 03082
• Inserting Tool V-COIL notch M 4 x 0.7: item 09107
• Wire thread inserts - type SN - tangless M 4 x 0.7 – 1.5 D: item 09307

How to choose

Use the kit as a process sequence and do not mix components from different thread sizes unless the repair data confirms the match.