CD VERTICAL LIFTING CLAMP

The VOLSN CD Vertical Lifting Clamp is an industrial-grade rigging solution engineered strictly for the linear vertical lifting and transport of steel plates. Featuring a heavy-duty forged alloy steel body and a 4:1 safety factor, it operates via a pre-tensioned spring-loaded self-locking mechanism to ensure absolute jaw engagement under zero load. Designed strictly for straight, non-side-loading vertical maneuvers, this clamp accommodates plate surface hardness up to 37 HRC (345 HB) and complies fully with CE  standards for heavy manufacturing and shipyards.

1. Strictly Rated for Straight Linear Vertical Transit: The CD series features a high-rigidity standard lifting eye optimized exclusively for straight-line vertical lifting and lowering. To ensure absolute structural integrity, this model is designed without multi-angle articulation, meaning side-loading or angular lifting is strictly prohibited. It delivers maximum stability and resistance against deformation during linear plate transit across structural steel workshops.
2. Pre-Tensioned Spring-Loaded Safety Lever: Equipped with a manual locking handle, the internal mechanism applies an immediate, robust clamping force onto the plate surface before the hoist line tightens. This self-locking design guarantees the jaws remain firmly engaged in both open and closed positions, eliminating any risk of slippage when setting down loads or during sudden crane speed changes.
3. High-Wear Resistant Induction-Hardened Alloy Jaws: The cam and pivoting jaw liner are die-forged from premium chromium-molybdenum alloy steel to handle high-frequency operation. It delivers absolute structural integrity for gripping structural plates with a maximum surface hardness of 37 HRC (345 HB), ensuring optimal teeth penetration without damaging the jaw profiles.

Technical Safety Note: Every VOLSN CD vertical lifting clamp is individually proof-tested to 2 x WLL (Working Load Limit). The minimum load applied must be at least 10% of the rated capacity. Always ensure the lifting line is perfectly aligned vertically; do not subject the standard CD lifting eye to side or lateral angular forces.

FAQ:

• Q: Can the VOLSN CD vertical lifting clamp be used for side-loading or turning plates from horizontal to vertical?

  • A: No, the standard CD vertical lifting clamp is strictly engineered for linear, straight-line vertical lifting and must never be used for side-loading or turning operations. Because it lacks an articulated universal joint, applying lateral or angular forces can bend the lifting eye or result in catastrophic load slippage; for flipping or turning operations, a model with a rotating shackle must be used.

• Q: What is the purpose of the manual safety lever on the CD lifting clamp?

  • A: The manual safety lever activates a pre-tensioned spring mechanism that forces the jaw to grip the steel plate before any lifting tension is applied by the crane. This ensures that the clamp remains locked onto the load even under zero-load conditions, preventing accidental release if the plate strikes an obstacle or during placement.

• Q: What is the maximum plate hardness that the CD series can safely grip?

  • A: The maximum surface hardness for steel plates handled by the CD clamp is 37 HRC (345 HB). The hardened alloy teeth require a slight surface penetration to achieve a secure friction grip; materials exceeding 37 HRC or stainless steel plates will resist this penetration and may cause dangerous slipping (non-marring clamps should be used for stainless steel).

• Q: Does the VOLSN CD vertical lifting clamp come with compliance certificates for safety audits?

  • A: Yes, every individual CD clamp fully complies with European CE (EN13155) and German GS standards and is shipped with an official Mill Test Certificate. Each unit undergoes a 200% proof-load test at the factory to verify its 4:1 safety factor, making it fully ready for strict third-party site safety inspections.