Panoramica
Large bearings — slewing rings, turntable bearings and other thick-section ring bearings — need a rust-inhibiting wrap before they leave the plant, because the machined faces and raceways are the surfaces most exposed to damage in storage and transport. A big bearing packing machine wraps a bearing of this class in VCI film while the bearing stays in place and the wrapping ring rotates around its section, so the film is applied evenly against the outer edge and the end faces of the ring. This article explains the ring-wrapping cycle, how to specify VCI film and wrap settings, and what to confirm before purchase. It is written for production engineers and logistics managers at bearing manufacturers and at plants that machine and ship large ring bearings.
The video below shows the machine wrapping a large bearing with VCI film:
How the Ring Wrapper Wraps a Large Bearing
The machine in the footage is a ring-type wrapper rather than a turntable wrapper: the bearing is placed upright in the station and remains stationary while the wrapping ring rotates around its section and lays the film, so the film hugs the outer edge of the ring and the end faces instead of relying on the load to turn.
| Stage | Che succede |
|---|---|
| Caricamento in corso | The bearing is placed upright in the wrapping station, normally with a crane or lift because of its size and weight. |
| Threading | The operator starts the VCI film onto the bearing section. |
| Rotazione dell'anello | The wrapping ring rotates around the stationary bearing and lays film evenly around the outer edge and the faces. |
| Film cut and finish | The film is cut, the ring returns, and the wrapped bearing is removed from the station. |
Because the load does not turn, a ring configuration can handle a bearing that is too large or too heavy to rotate safely on a table, and the film is drawn with even tension around the full circumference. Ring size, drive and station dimensions are set to the bearing range on each project.
Specifying VCI Film and Wrap Settings
| Ingresso | Perché è importante |
|---|---|
| Bearing outside diameter and ring-section width | Sets the ring opening and how far the film reaches across the faces. |
| Peso del cuscinetto | Sets the load stand and the loading and unloading method. |
| VCI film grade and width | Sets corrosion protection and the number of wraps per layer. |
| Overlap and number of layers | Sets coverage, film consumption and protection for the transport route. |
| Metodo di carico e scarico | Confirms how bearings enter and leave the station. |
VCI film carries a vapor-phase corrosion inhibitor inside the wrap, so the sealing quality — the overlap and layer count — determines whether the inhibitor stays contained around the bearing during long storage or sea freight, not just the visual coverage. All bearing dimensions, weights and film settings are confirmed per project; values seen in the footage are not a published specification.
Cosa mostra il filmato
The footage shows a large bearing wrapped in blue VCI film by a ring-type machine: the bearing stays in place and the ring rotates to apply the film, which is why the load-stationary description above matches what is demonstrated. Strapping, palletizing and covering are not part of the ring wrapper and do not appear in the footage; where a customer needs them before shipping, they are configured as additional steps per project. The wrap material (VCI film of a chosen grade, with film plus paper as an alternative) is a project setting.
Factory Testing and Safety
Keep clear of the wrapping ring and the bearing station while the machine runs, and load, unload or rethread film only with the machine stopped and isolated; follow the machine manual for guard positions around the ring zone. For CE markets, EN 415-10 is used as the packaging-machinery safety reference and ISO 12100 guides the risk assessment for guarding; confirm the applicable standards and delivered documentation with the manufacturer for your market. As a stated manufacturer practice for this machinery family, each unit undergoes sustained functional and safety testing before delivery (about 24 hours where stated), covering the control system and the emergency-stop function; treat this as the stated family practice and confirm the test record for your unit.
FAQ
Q: Why wrap a large bearing in VCI film?
A: VCI film releases a corrosion inhibitor inside the wrap, which protects the machined surfaces and raceways during storage and transport.
Q: Does the bearing rotate while it is wrapped?
A: No. In a ring-type wrapper the bearing stays stationary and the wrapping ring rotates around its section.
Q: What sizes can the machine take?
A: Bearing outside diameter, ring-section width and weight are set per project; state your range to the manufacturer for a confirmed configuration.
Q: How many wraps make one layer?
A: Wraps depend on film width, the ring-section size and the overlap chosen for sealing; the value is confirmed per project.
Q: Can the machine also strap or palletize?
A: Strapping, palletizing and covering are downstream steps, not part of the ring wrapper; they can be configured per project where needed.
Passo successivo
Send the bearing drawing (outside diameter, ring-section width and weight) and the number of bearings per shift to info@fhopepack.com, so the ring size, VCI film grade and wrap settings are confirmed on the approval drawing.
Risorse correlate
- Automatic Bearing Packaging Machine for Steel – Automatic bearing wrapping for big bearings in the same product family.
- Horizontal Orbital Wrapper (E100) – A ring-type orbital wrapper in the same wrapping family, for cylindrical and ring-shaped loads.
