An armoring machine is chosen for a specified cable construction, not simply for the largest diameter shown in a catalog. Steel wire, steel tape, and interlocked metal armor use different incoming materials and form different structures. This guide compares the equipment questions a buyer should ask after the cable designer has defined the required armor.
First, identify the armor in the cable drawing
Read the cross-section, material specification, relevant standard, and application requirements. Record the diameter and shape of the cable core before armoring, the number of armor layers, and the required finished structure. A round or flat core may need different tooling. If the design has not selected an armor type, ask the cable engineer to make that decision before treating three machine quotations as alternatives.
The published diameter of a machine center channel, the maximum pre-armoring core diameter, and the finished cable outside diameter are different measurements. State each one explicitly in an RFQ.
Steel-wire armoring equipment
A steel-wire armoring line applies individual steel wires around a cable core. BYC publishes 315–630 steel-wire armoring models with steel-wire diameters of 0.5–4.0 mm across the range. Its model-specific pre-armoring cable diameter limits vary from 35 to 120 mm; those figures must be matched to a specific machine rather than treated as one universal operating envelope.
For this route, confirm the wire material and diameter, number of wires, one or two armor layers, lay direction and length, reel arrangement, wire tension, and the cable-core size. The published 24+24 style configuration describes machine sections or positions; it does not alone determine the finished cable structure. Check the required traction and take-up as part of the complete line.
Steel-tape armoring equipment
A steel-tape armoring machine wraps strip material around the cable core to make the armor defined in the cable drawing. BYC lists machines for steel-tape widths of 5–80 mm across its published range. Tape thickness, overlap, edge quality, tension, and the selected wrap arrangement still need to be specified for a particular cable.
Ask the supplier to confirm the usable core range, tape reel, wrapping head, guarding, and downstream line interfaces. Catalog head rpm is an equipment limit, not an operating speed promise. A steel-tape wrapping head also does not make interlocked armor merely because both processes use strip material.
Interlocked-armor equipment
An interlocked-armor machine continuously forms a profiled metal strip and engages adjacent turns to create an interlocked layer. BYC lists LKZ50, LKZ100, and LKZ130 models using aluminum-alloy or stainless-steel strip in published configurations. Across models, listed strip widths are 9.5–25.4 mm, while the applicable round-core range and line-speed limits vary by model.
An interlocked construction needs more than a strip-width check. Provide strip material and thickness, the round or flat core geometry, target interlock profile and pitch, core support, required output, and inspection method. BYC publishes maximum line speeds of 8–12 m/min across the models; the achievable speed for a specific material and cable must be confirmed in a project proposal.
A short selection sequence
- Confirm the cable design: identify wire armor, wrapped tape armor, or interlocked armor on the approved drawing.
- Describe the input: provide core shape and dimensions before armoring, plus wire diameter or strip width and thickness.
- Define the output: specify layer count, lay or overlap, interlock profile where applicable, and the required inspection criteria.
- Check the line: compare pay-off, reel loading, traction, take-up, safety guarding, power, and floor layout.
- Compare proposals on the same basis: request a stated operating speed and acceptance method for the same cable construction.
What to send with an armoring RFQ
Send the cross-section and standard, core diameter and shape before armoring, armor material grade, wire or strip dimensions, reel data, target construction, expected operating schedule, and any factory acceptance requirements. Ask which items are included in the quoted line and which require separate equipment or tooling.
Use the BYC steel-wire armoring, steel-strip armoring, and interlocked-armor product pages to identify a starting configuration. The engineering quotation should resolve any unclear fit between published ranges and your approved drawing.
Frequently asked questions
Can one steel-tape machine make interlocked armor?
Do not assume so. The interlocked layer requires a forming and engagement process that differs from ordinary strip wrapping. Request explicit confirmation of the intended construction and machine tooling.
Is the maximum cable diameter the finished outside diameter?
Often it is not. Some specifications refer to the cable core entering the machine. Check where and how every quoted diameter is measured.
Can I choose by maximum rpm or line speed alone?
No. Published maxima describe particular machine configurations. Material, armor geometry, tension, reel loading, and quality requirements determine a realistic operating condition.
