This V-COIL free running type S refill pack is for repairing or reinforcing an internal UNC 3/4 x 10 thread with an insert length of 2.0 D. Use it when the prepared STI thread and the mating screw connection require this exact designation and length.
UNC identifies a Unified coarse inch thread used on inch based fasteners and must be matched to the stated thread series. Free running inserts are selected when normal screw running behavior is required after installation. Check the thread designation, tool stage, holder guidance, lubrication, and inspection method before work starts. This makes the refill pack specific to maintenance repair, machine service, fixture repair, and spare part restoration.
- installing wire thread inserts in a prepared STI thread for UNC 3/4 x 10
- selection by thread designation, insert length 2.0 D, and free running type S execution
- repairing internal threads in components that need the original screw connection concept retained
- workshop stock management for repeated V-COIL repair operations
Note Use only with the correct STI tap, installation tool, and thread preparation process for UNC 3/4 x 10.
- free running insert execution is suited to screw connections without an additional locking insert function
- insert length 2.0 D is visible in the product data for quick comparison with the repair specification
- Unified coarse inch thread identification helps separate metric, Unified, or Whitworth repair stock
- compact refill stock supports maintenance planning for repeated insert replacement
Drawbacks
- This refill pack does not include preparation or installation tools; use a suitable V-COIL repair kit or tool set when the required tools are not already available.
- Confirm that the damaged thread is UNC 3/4 x 10 and that the selected insert length is 2.0 D.
- Prepare the hole according to the V-COIL repair process before inserting the wire thread insert.
- Cut the STI thread with the matching STI tap for the repair system.
- Clean the prepared thread so chips do not interfere with insert seating.
- Place the insert on the installation tool and drive it into the prepared thread.
- Remove the tang if the selected insert execution and process require that step.
- Check screw engagement by hand and inspect the repaired thread area.
- 5 pieces V-COIL free running type S inserts UNC 3/4 x 10 - 2.0 D
- System: V-COIL wire thread insert
- Insert execution: free running type S
- Thread system: Unified coarse inch thread
- Thread designation: UNC 3/4 x 10
- Insert length: 2.0 D
- Pack quantity: 5 pieces
- When do you choose a refill pack instead of a complete repair kit?
- Choose a refill pack when the required drills, STI taps, inserting tools, and tang tools are already available for the repair system.
- Which thread does this insert match?
- This insert matches UNC 3/4 x 10. UNC identifies a Unified coarse inch thread used on inch based fasteners and must be matched to the stated thread series.
- What does free running type S mean in assembly?
- Free running type S supports normal screw movement after correct installation and does not add a locking insert function.
- Why is insert length important?
- Insert length 2.0 D affects the available thread engagement in the repaired component and must match the repair requirement.
- Where can you find V-COIL thread repair technical information?
- Use the Technical information V-COIL thread repair as PDF.
- What should be checked after installation?
- Check that the insert sits below the entry surface where required, that the screw starts smoothly, and that no chips remain in the thread.
- How do you avoid mixing inch repair sizes?
- Compare thread family, nominal size, threads per inch, and insert length because similar inch sizes are not interchangeable.
- Where can you find the VÖLKEL thread repair catalog?
- Use the VC 23 catalog as PDF.
Do you need help selecting or using the product?
Use the contact form.
In this category: Thread repair
