Terminal crimping

LIHENGRIX crimping tools: choose by the connection

The LIHENGRIX terminal range starts with two wire-end types: LH-F06 for ferrules and LH-I06 for pre-insulated terminals. Each guide covers the connection areas, working sequence and completion checks. Identify terminal construction and wire conditions before reviewing the corresponding model.

A stranded-wire end entering a panel terminal and a ring terminal on an equipment stud have different forming and mounting requirements. Physical fit between jaws alone is not compatibility; review the barrel or sleeve, conductor combination and component requirements together.

Related information: LH-F06 ferrule guide · LH-I06 insulated terminal guide

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What crimping does

Crimping uses controlled deformation of a terminal barrel to retain a conductor without melting it. The connection has electrical and mechanical requirements: the barrel must contact the wire strands appropriately, while the assembled conductor must resist movement. The result depends on the wire, terminal, die and process together. Closed handles alone do not establish connection quality.

The LIHENGRIX terminal range is organized around panel wiring, equipment assembly and repair. LH-F06 addresses wire-end ferrules; LH-I06 addresses insulated terminals. Identify the terminal construction before choosing a tool, because similar-looking parts can require different forming profiles.

Common terminal constructions

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Understanding crimp profiles

Square and hexagonal describe the finished cross-section and commonly arise when selecting ferrule tooling. The terminal-block opening, clamping method and accepted conductor combinations matter as much as appearance. Wire construction and sleeve wall thickness can change the final dimensions even at the same nominal conductor area. No profile is automatically suitable for every terminal block.

An insulated-terminal die must match the barrel while managing pressure on its insulation. Using a ferrule tool on an insulated ring terminal may damage the sleeve or deform the barrel unevenly. For two conductors, use a twin ferrule and a wire combination accepted by the relevant components instead of forcing two wires into a single-wire part.

Wire size, color and strip length

The mm² marking denotes nominal conductor cross-sectional area; AWG is a separate sizing system. Numbers are not directly interchangeable. Insulation outside diameter is a different property and determines how the support area fits the wire. Thick insulation around a small conductor and thin insulation around a larger conductor may need different support conditions.

Collar colors help organize ferrules, but color systems vary between ranges. Read the size marking and component data rather than relying on color alone. Strip length should follow the barrel geometry and component instructions: too little stripping can trap insulation in the conductor crimp; too much can leave unwanted exposed copper. Cutting away strands to fit a smaller terminal changes the conductor and is not a selection method.

Related information: Three wire-preparation tasks

From preparation to inspection

1. Prepare: identify wire material, cross-section, terminal part number and die. Inspect stripped ends for missing or nicked strands and insulation residue.
2. Locate: seat the conductor in the metal barrel and keep the terminal oriented correctly. Use a locator specified for that terminal where required.
3. Form: complete the prescribed tool cycle without repositioning the terminal midway. Release jams according to the tool instructions and investigate the mismatch.
4. Inspect: review insertion, deformation, insulation and exposed conductor. Apply dimensional, pull-force or other checks required by the process, recording the acceptance conditions.

More compression is not always better

Insufficient compression can leave poor strand retention; excessive compression can damage the terminal or conductor. Investigate terminal size, wire area, stripping, die selection and tool condition before increasing compression. Repeatedly pressing the same point is not a substitute for finding the cause.

Visual checks reveal some defects but do not independently establish electrical or mechanical performance. For repeated assembly, qualify representative samples and retain first-piece and material-change checks. A result established for one wire, terminal and tool combination does not automatically transfer to another.

Related information: Troubleshooting loose crimps

Connect model selection to the workflow

Identify the terminal, prepare the wire, then review crimping and final installation. For end preparation, compare stripping with cutting. For loose crimps or split sleeves, return to the wire-terminal-die combination. Follow the relevant documentation instead of choosing from tool names alone.

Related information: Identify terminals and tools · Stripping and cutting · Crimp troubleshooting

Common questions