High-flex cable assembly
Assemblies for equipment that keeps moving: 3D printers, gantries and drag chains that bend, robot joints and dress packs that twist. Bending and torsion are rated separately and a cable fit for one is not automatically fit for the other, so the construction is chosen against your motion profile and confirmed with the supplier before we quote — never as a cycle count.
What this service covers
Typical working ranges. Outside them? Send the drawing anyway — we check it with the supplier and tell you what is possible.
| Applications | Drag chains, gantries and linear axes; robot joints, wrists and dress packs; 3D printers and mobile platforms |
| Motion types | Continuous bending, repeated torsion, and the two combined — each a different cable construction, each rated on its own |
| What we need from you | Bend radius; twist angle and the length it acts over; motion frequency and cycle target; temperature; the envelope and cable OD limit; shielding; connectors; required tests |
| Construction | Fine-strand conductors, lay and fillers suited to the duty, TPE or PUR jackets — a cable maker’s rated construction, selected per application |
| Shielding | Braid or spiral screen chosen to survive the motion, terminated 360° so the shield takes no strain at the connector |
| Strain relief & routing | Anchored at both ends, service loop sized to the range of motion, sleeving where the cable meets structure |
| Service life | The maker’s flex- or torsion-life rating holds for its test conditions, not yours — lifetime in your machine is validated by an agreed plan, never quoted as a blanket figure |
| Testing | Continuity and pull-force per the agreed plan. Cycle testing on the supplier’s rig, set up to reproduce your motion as closely as it can — target cycles, pass criterion and report agreed in the test plan; where the rig cannot follow the motion, a sample runs in your equipment instead |
How high-flex cable assembly runs here
Describe the motion
Whether the cable bends, twists or does both — then bend radius, travel, twist angle and duty cycle. They matter more here than the wire gauge.
Cable selection
A construction is proposed with its maker’s rating and confirmed with the supplier before quoting.
Cycle test, then your machine
The chosen construction runs on the supplier’s cycle-test rig at your motion; where it matters, a sample then runs in your equipment before a production run.
Build and repeat
The approved construction is held for reorders.
Common questions
Is a drag-chain cable suitable for a rotating robot joint?
Not automatically. A drag-chain cable is rated for bending at a radius over a travel. A rotating joint twists it along its axis, which loads the conductors and shield differently, so the stranding, lay and fillers have to be chosen for torsion. Robot cables are rated for twist over a stated length, and a short joint run reaches that rating at a modest angle. Tell us the motion and the construction is chosen for it.
Do you publish flex-life or torsion-life ratings?
No. A cycle figure belongs to a cable construction under its maker’s test conditions — radius, speed, temperature and the failure criterion it counts — and two makers’ figures are not comparable unless those match. We quote the construction with its maker’s rating and validate lifetime for your application by a cycle test on the supplier’s rig, against a plan we agree with you.
What should a high-flex RFQ include?
The drawing or a sketch with lengths and connectors; how the cable moves — bend radius, twist angle and the length it twists over, cycles per minute and the target cycles; operating temperature; the space and the largest cable diameter it allows; shielding; and the testing or report you need. A short video of the mechanism answers more than a page of text.