How To Avoid "flying Wires" During Crimping With A Cold-pressed Pin Crimper?
Loose wire strands, often called stray wires, create severe electrical hazards and signal disruptions. When technicians utilize a contact crimper, achieving a clean connection requires precise alignment and the correct tool calibration. Stray wires typically occur when the wire gauge misaligns with the terminal size or during improper insertion into the tool.
How to Prevent Stray Wires During Contact Crimping
Preventing stray wires requires a systematic approach to wire preparation and tool execution. Following standard technical procedures ensures every wire strand remains securely contained within the terminal barrel.
1. Accurate Wire Stripping
Strip the insulation cleanly without nicking the inner conductors. A damaged strand breaks easily under pressure, leading to loose ends outside the barrel during insertion.
2. Proper Strand Control
Maintain the natural twist of the conductor strands. Avoid over-twisting the wire, as this alters the circular mil area and prevents the wire from seating correctly inside the contact crimper.
3. Perpendicular Insertion
Insert the prepared wire straight into the terminal. Tilting the wire during insertion forces individual strands to catch on the barrel edge, pushing them backward.
Selecting the Right Tooling for Precision Connections
High-quality results depend heavily on matching the specific connector type with the appropriate machinery. Different terminals require specialized pressure patterns to secure all strands uniformly.
| Terminal Type | Recommended Tool Type | Compression Profile | Maximum Wire Gauge (AWG) |
|---|---|---|---|
| D-Sub Contacts | d sub contact crimper | Four-indent | 20 |
| Needle Terminals | Square/Hex Crimp Tool | Hexagonal | 10 |
| Wire Ferrules | Trapezoidal Crimp Tool | Square | 6 |
Troubleshooting Common Crimping Defects
To eliminate stray wires when using a cold-pressed needle crimping device, operators must match the wire gauge precisely to the terminal barrel, maintain the conductor's natural twist, and insert the wire perfectly perpendicular into the d sub contact crimper before cycling the tool fully.
Incorrect Die Size Selection
Using an oversized die fails to exert enough pressure, allowing strands to slip out. Conversely, an undersized die over-compresses the metal, shearing the outer strands completely.
Incomplete Tool Cycling
Most professional tools feature a ratchet mechanism. Releasing the handle before the full cycle completes leaves the terminal under-crimped, which fails to secure all peripheral wire strands.
