By TEBAOFLEX Jyen. Originally published on August 10, 2026.
Conductor breaks, corkscrewing and shield wear in an energy chain can result from the cable construction, its installation or the motion system. A cable’s nominal cycle rating does not excuse crowding, twist or an unsuitable bend radius. Diagnose the complete route before selecting a replacement.
Start with the pattern of damage
- A break near a clamp suggests checking strain relief, unsupported transition length and repeated bending at the clamp edge.
- A localized flattened jacket suggests pinching, cable crossover or an unsuitable compartment layout.
- Helical deformation suggests investigating installed twist, restraint, loading and cable suitability; it is not proof of one specific internal construction defect.
- Shield dust or broken braid warrants examination of internal abrasion and motion qualification, not just an external jacket inspection.
Use clearances and separation, not a universal fill percentage
The carrier supplier’s guidance is the starting point. igus gives different clearance recommendations for electrical cables and hoses, requires free movement and describes separation based on the contents and compartment geometry. A blanket 60% cross-sectional fill rule does not establish that cables cannot cross, pinch or rub.
Check the maximum cable diameter against usable compartment height, space beside cables, separator thickness, mass distribution and dynamic behavior. High-speed arrangements may need individual compartments or horizontal shelves. Verify hose expansion separately from cable clearance.
Illustrative dimensional check only: a 16 mm cable with an assumed 2 mm clearance on each side needs a 20 mm clear slot, not 18 mm. This example explains two-sided arithmetic; it does not prescribe the correct allowance for a particular carrier.
Bend radius and freedom of movement
Use the most restrictive moving bend-radius requirement among the cables and hoses, including temperature effects. The carrier radius must suit the contents. Do not substitute a fixed-installation radius or a generic multiple from an unrelated cable family.
Pay cable off without adding twist and follow the specified preparation procedure. Cables should move through the bend without being pulled taut or tied into a bundle that prevents the intended relative movement. Strain-relief positions and methods depend on the approved cable-carrier arrangement, not a universal 15D distance.
Inspect the electrical and mechanical consequences
After safe isolation, inspect routing and terminations, then test conductors, shields and insulation using procedures appropriate to the connected equipment. Avoid applying a cable dielectric test through sensitive drive or feedback electronics. Intermittent faults may require controlled motion monitoring with appropriate precautions.
Specify a replacement that can be verified
- Provide cable sizes, diameters, weights, travel, radius, speed, acceleration and environmental conditions.
- Request evidence for the complete cable construction under relevant motion conditions; no braid angle or insulation name alone proves life.
- Define monitoring and failure criteria for conductor continuity, shield performance and any data channels.
- Record the final compartment layout and check it after any later cable or hose additions.
Sources and scope
igus: filling and distribution guidance
igus: gliding-chain design guide
These references explain the relevant methods or manufacturer guidance. They do not certify a TEBAOFLEX product or establish results for a supplied batch.
Discuss your specification
For a project-specific cable specification, send the duty, installation drawing and required acceptance criteria to TEBAOFLEX. WhatsApp: +86 185 9591 3361. Request documented product ratings and test evidence before approval.