Large Cable Coil Stretch Film Wrapping Machine WM-4821

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The WM-4821 wraps large finished cable coils in stretch film. It takes coils from 420 mm to 550 mm outer diameter and 110 to 125 mm high — the size class above a benchtop wrapper — and runs film up to 10 cm wide off a standard mini roll. An open C-shaped film ring passes through the coil bore while four powered support rollers index the coil round, so one continuous spiral of film covers the whole ring without the operator threading anything by hand.

Specifications

Key features

• Sized for the large coil class — 420 to 550 mm outer diameter, where a benchtop wrapper runs out of ring clearance
• Open C-shaped film ring passes through the bore of a closed coil, so nothing has to be cut, threaded or re-tied to load the coil
• Four support rollers on two driven discs carry the coil and index it forward between wrap cycles, laying the film as one continuous spiral around the full circumference
• Film carriage rides on cam rollers around the ring and pulls film off an ordinary mini stretch film roll, up to 10 cm wide — a consumable you can buy anywhere
• Run time and workpiece dwell delay are entered on the panel display; two keypad drives set ring speed and coil indexing speed independently
• Foot pedal starts the cycle so both of the operator's hands stay on the coil
• Powered discharge chute at the outfeed side rolls the wrapped coil off the machine
• Free sample test — send us a sample coil, we wrap it on this machine and send you the video before you order

What it processes

• Packing large finished ring coils of cable, hose and tube for shipment, 420–550 mm outer diameter
• Wire and cable plants shipping coils by the piece that need each coil sealed against dust, moisture and slack turns
• Irrigation and garden hose, welding cable and extension cable coils sold as a single wrapped unit
• Distribution and cut-to-length warehouses repacking drum stock into wrapped customer coils in the large size class

Suited for: stretch film wrapping of large finished ring coils — outer diameter 420 to 550 mm, coil height 110 to 125 mm, film up to 10 cm wide. Not suited for: coils below 420 mm outer diameter — those belong on the WM-4818 cable coil stretch film wrapping machine (coil Ø 120–400 mm, height 50–120 mm, ≈120 coils/h), which is the benchtop machine one size class down. It also does not wind or tie the coil: to wind it, use the WM-4810 wire coiling machine with meter counter (inner hole 30–350 mm, 380 mm reel standard, 420 mm on request); to hold the turns with a twist tie rather than film, the WM-4804 cable coil twist tie binding machine ties bundles of Ø 5–35 mm. For coils above 550 mm outer diameter, ask us about a custom build.

The size class this machine exists for

Ring wrappers are built around one number: how big a coil will clear the film ring. Below roughly 400 mm a compact benchtop unit does the job and costs less to buy and to ship. Above that the ring, the frame and the roller cradle all have to grow, and a coil of 500 mm and 100-plus turns is heavy enough that an operator should not be rotating it by hand while a second person walks film around it. The WM-4821 covers exactly that band — 420 to 550 mm outer diameter, 110 to 125 mm high. If your coils sit under 420 mm, the WM-4818 is the cheaper and better answer, and we will tell you so.

How the wrap happens

The film carriage does not swing around the outside of the coil. It rides on an open C-shaped ring that passes straight through the coil bore, so the film goes around the coil’s cross-section the way tape goes around a doughnut. Because the ring is open at the top, an operator drops a closed coil onto the support rollers without cutting or threading anything. Four roller posts on two driven discs then index the coil forward between wrap cycles, so successive spirals of film overlap all the way around the circumference and close back at the starting point. A foot pedal starts the cycle, and the finished coil rolls off down the chute on the outfeed side.

What we know and what we do not

The manufacturer publishes a short data sheet for this model: coil outer diameter, coil height, film width, and one weight figure. There is no published cycle rate, motor rating, machine footprint or shipping weight, and we have not invented any. Everything in the table above is copied from the factory data; the empty lines stay empty until we have a source for them. If you need a throughput number for a capacity plan or a crate size for a freight quotation, ask — we go and get it in writing rather than estimate it for you.

Send us two or three of your actual coils. We wrap them on this machine, film the cycle, and send you both the video and the wrapped coils before you commit to an order.