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Description
FINISHED THREADM22 × 1.5
VARIANT2×D (44 mm)
MATERIALStainless steel
SYSTEMV-Coil
M22x1.5 2xD thread repair insert – V-Coil DIN 8140 helical thread insert
Thread insert technical data table
| V-COIL M22x1.5 2×D THREAD REPAIR INSERT | |
|---|---|
| Restored thread | M22 × 1.5 |
| Thread pitch P | 1.5 mm |
| Length variant | 2×D |
| Insert height | 44 mm |
| Repair system | V-Coil |
| Compatible tap | M22x1.5 4H V-Coil |
| Pre-drilled hole | Ø22.5 mm |
The V-Coil M22x1.5 thread repair insert made from Helicoil-type stainless steel wire restores a damaged thread without replacing the entire part. When screwed into a hole tapped with a thread repair tap, it creates a fully functional M22x1.5 thread for a standard screw. No larger screw or new housing is needed. The 2xD version with a height of 44 mm is suitable for soft materials and joints tightened to higher torques. The design complies with DIN 8140, form A, or free-running.
M22x1.5 thread repair step by step – from the hole to the completed joint
Four installation steps in the V-Coil system
Thread repair process M22 × 1.5
1Prepare the hole
diameter: Ø22.5 mm
2Tap the thread
tool: V-Coil 4H
3Screw in the insert
length: 2×D
✓Restore the joint
thread: M22 × 1.5
Screw in the insert using an installation tool — do not stretch it or twist it sideways.
Practical installation checks
Before installation, clean chips and coolant residue out of the hole. Screw in the insert with an installation tool, keeping it straight and using no force. A properly seated insert sits 1/4–1/2 of a turn below the surface. Finally, break off the tang (the crosspiece at the bottom of the insert) with a punch; if the hole is blind, remove the broken piece so that it does not obstruct the screw.
Helicoil-type insert made from diamond-section wire – construction and operating principle
How the insert stays in the hole
The wire has a diamond-shaped cross section: one edge acts as a screw in relation to the hole, and the other as a nut in relation to the screw being installed. The free coil is slightly larger than the thread in the hole; as it is screwed in, it contracts elastically, then expands upon release and locks permanently in place without adhesive or additional components. Cold-rolled wire with a minimum tensile strength of 1400 MPa produces a thread that is harder and smoother than one cut directly into the material.
Why an STI tap is required instead of a standard M22x1.5 tap
The wire thickness is determined by the thread pitch: 0.65 × 1.5 mm ≈ 0.98 mm.
The thread for the insert is enlarged to accommodate the wire on both sides of the profile — its diameter is approx. 23.95 mm compared with 22 mm for a standard M22x1.5 thread.
It can only be cut with a thread repair tap M22x1.5 4H V-Coil in a hole drilled to Ø22.5 mm; after the insert is installed, the hole returns to the nominal thread M22 × 1.5.
M22x1.5 thread repair in steel, stainless steel, cast iron and aluminum
When to choose the 2xD version
The insert restores threads in steel, stainless steel, cast iron, and aluminum, as well as magnesium and plastics. The version 2xD with a height of 44 mm is standard for aluminum and typical joints. A shorter 1.5xD insert is selected for shallow holes and hard steel. A longer 2.5–3xD insert is used in soft materials and with screws of property class 8.8 and higher. M22x1.5 threads of this diameter are found in thermal switch and reverse light switch ports, among other applications. After installation, the first thread carries approximately half the force, as shown in the load distribution table.
Thread strength: how much load each turn carries
| Thread turn | Standard thread (without an insert) | Thread with a V-Coil insert |
|---|---|---|
| 1 (first from the screw head) | 50% | 30% |
| 2 | 25% | 22% |
| 3 | 12% | 17% |
| 4 | 6% | 13% |
| 5 | 3% | 10% |
| 6 | 2% | 8% |
How to read the table: when the screw is tightened, each thread turn carries part of its load. In a standard thread, the first turn carries as much as 50% of the load — and it strips first. With an insert, the same turn carries only 30% because the load is distributed over the entire thread length. Catalog data from wire thread insert manufacturers.
M22x1.5 2×D insert compatibility – required V-Coil system tools
Check before purchasing
✓Nominal thread: M22x1.5 with a pitch of 1.5 mm.
✓Tap: special M22x1.5 4H V-Coil thread repair tap.
✓Tap drill hole: Ø22.5 mm drill bit.
▲Depth: space for an insert 44 mm high and proper seating.
▲
V-Coil system requirements
Installing the insert requires an STI thread — it can only be cut with an M22x1.5 4H V-Coil thread repair tap. The free-running insert allows the screw to be screwed in and out freely; where severe vibration occurs, add threadlocker or choose a screw-locking version.
A correctly installed V-Coil M22x1.5 2xD thread repair insert carries loads so that the screw shank fails before the thread in the material. Plan the hole depth: the insert occupies 44 mm, or twice the thread diameter (2 × 22 mm). In series production, the same insert serves as preventive reinforcement.
Frequently asked questions
The length is selected according to the parent material and screw property class — the weaker the material and the stronger the screw, the longer the insert. The 1.5xD version is suitable for steel, cast iron, and shallow holes, 2xD is standard for aluminum, and 2.5–3xD is used in soft materials and with screws of property class 8.8 and higher. This insert has a length of 2xD (44 mm).
The top coil of the insert should sit 1/4–1/2 of a turn below the surface of the seat. After installation, the tang is broken off with a punch. In a blind hole, the broken fragment must also be removed.
Yes, insert dimensions are specified by DIN 8140 as well as ASME B18.29.1. This makes Helicoil, V-Coil, Recoil, and BaerCoil inserts interchangeable. 3 parameters matter: size, pitch, and length.
Yes, the free-running version is secured with threadlocker or a self-locking nut. Under severe vibration, form B screw-locking inserts in accordance with DIN 8140 are used. They have a polygonal coil that locks the screw.
Product accessories
Drill 22.5 Cobalt NWKc HSSE DIN 345
Reference: 0000010585 In stock < 10 items
€34.21
€42.08 brutto
Thread repair tap M22x1.5 4H V-Coil
Reference: 0000012987 In stock > 10 items
€22.37
€27.51 brutto
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| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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