Product Specification

Little-Size Double-Folded Lebus Grooved Winch Drum Q355B For Offshore

1.Little-Size Double-Folded Lebus Grooved Winch Drum Q355B For Offshore

The DH8‑250L‑1‑GRU Double‑Folded (Lebus) Grooved Winch Drum is the core load‑bearing and wire‑rope winding component for winch systems. It adopts a welded composite construction, consisting of left‑right end flanges, drum barrel, precision‑machined Double‑Folded Lebus rope‑groove working surface and shaft‑hub mating interfaces, specially engineered for multi‑layer steel wire rope spooling.
The main drum outer diameter is Φ380 mm; groove crest diameter Φ260 mm, groove root diameter Φ255 mm, groove pitch 8.4 mm, transition radius 2.5 mm. The effective winding length reaches 336 mm, both side flanges are 20 mm thick, total assembly dimension is 685.5 mm. This model is supplied in quantity of 2 pieces per set.
Thanks to the precisely‑machined double‑folded Lebus groove profile, it guides wire‑rope to wind in orderly layers, effectively avoiding rope crossing, crushing and disorder spooling which commonly occurs on smooth‑bore drums. Fabricated from high‑strength Q355 steel with welded assembly, the grooved surface is precision‑machined for high rigidity and impact resistance. Pre‑machined mounting bores on two end flanges allow direct connection with winch drive shafts and bearing housings. It ensures stable rope spooling under heavy‑load pulling and lifting operations, greatly improving the reliability and operational safety of the complete winch unit.

2.Little-Size Double-Folded Lebus Grooved Winch Drum Q355B For Offshore Parameter

3.Little-Size Double-Folded Lebus Grooved Winch Drum Q355B For Offshore Advantage

• Superior Multi‑Layer Spooling Performance:The special geometry of Double‑Folded Lebus groove guides wire‑rope to transit smoothly between layers. It effectively prevents rope crossing, crushing and disorder spooling. Neat multi‑layer arrangement avoids destructive squeezing between rope strands, greatly extends wire‑rope service life and cuts down rope‑replacement maintenance cost.
• High‑Strength Welded Construction:Fabricated from Q355 high‑strength steel plate with post‑weld stress‑relief treatment. 20 mm thick reinforced flanges provide high structural rigidity against heavy impact and alternating pulling loads, reliable for long‑term continuous operation under harsh conditions.
• Precision‑Machined Groove Profile:CNC milled rope‑groove matches wire‑rope cross‑section perfectly. Uniform contact distribution eliminates local point‑contact abrasion and relieves bending fatigue of steel wire rope.
• Good Assembly Compatibility:Standard machined mounting bores on two end flanges fit regular winch drive shafts and bearing housings. Easy installation and replacement, compatible with hydraulic‑driven and electric‑driven winch units.
• Enhanced Operational Safety:Stable rope spooling eliminates rope jumping and rope‑dislodging risks. It reduces unplanned downtime caused by poor spooling and improves overall winch system reliability, lowering site‑operation safety hazards.
• Strong Environmental Adaptability:Carbon‑steel substrate supports anti‑corrosion treatments such as zinc spraying and zinc‑rich primer painting upon request. Well‑suited for salt‑spray marine environment, humid and dusty outdoor working sites to extend drum service lifetime.

4.Little-Size Double-Folded Lebus Grooved Winch Drum Q355B For Offshore Application

This Double‑Folded Lebus grooved drum serves as key spare part for various winch and hoist units, widely deployed in marine & offshore, port, construction and mining industries.
For marine vessels, it fits deck mooring winches, anchor winches and tugger winches for orderly multi‑layer spooling of mooring ropes and anchor wires. In offshore projects, it applies to ROV handling winches, offshore wind lifting winches and pipe‑laying winches. Within port terminals, it is used for luffing winches and hauling winches on gantry cranes. For construction machinery, it works for crane hoists, drilling rig winches and mining hoisting equipment.
It is suitable for working conditions requiring multi‑layer wire‑rope spooling with heavy cyclic loads, frequent start‑stop cycles and humid outdoor corrosive environments, compatible with both hydraulic winches and electric winches.