Spinlock TC50 – 2x2 Sheave Double Stack Organiser (Symmetric and Asymmetric)
The Spinlock TC50 2×2 Sheave Double Stack Organiser is a compact high-load solution designed for yachts requiring four heavily loaded lines to be routed within a minimal deck footprint. Using two stacked rows of 50 mm alloy sheaves, each rotating on plain bearings, this organiser provides dependable performance for halyards, reefing lines, and primary control lines operating under significant tension.
The stacked configuration allows two sheaves to be positioned above two lower-row sheaves, reducing overall footprint compared with separate organisers. The lower row retains the full TC50 Safe Working Load, while the upper row carries a reduced load rating to ensure structural balance and efficient load distribution.
Available in Symmetric and Asymmetric variants, the TC50/D enables installers to tailor footprint and alignment to suit varied deck geometries. Line diameter compatibility up to 14 mm ensures suitability for large cruising yachts and high-performance race yachts.
Key Features
• Four 50 mm alloy sheaves arranged in two stacked rows (2 upper, 2 lower)
• High-load sheave configuration for compact deck layouts
• Plain bearings for smooth, predictable operation under elevated loads
• Symmetric and Asymmetric variants for installation flexibility
• Allows high-load lines to be routed above secondary lines
• Reduced footprint versus two independent organisers
• Supports line diameters up to 14 mm
• Compatible with TC50 single-layer organisers for integrated line management
Load Ratings – TC50 Double Stack (TC50/D)
Upper Row (2 sheaves):
• SWL per sheave: 1000 kg
• Total SWL (2 sheaves): 2 × 500 kg = 1000 kg
Lower Row (2 sheaves):
• SWL per sheave: 1500 kg
• Total SWL (2 sheaves): 2 × 750 kg = 1500 kg
This combination provides efficient load separation while maintaining compact size and high capability.
Applications on Sailing Yachts
• High-load halyard and reefing line diversion where deck space is constrained
• Mixed-load systems requiring strong lower sheaves and lighter upper sheaves
• Performance yachts needing high-strength routing with minimal footprint
• Mast-base or coachroof installations with vertical-height restrictions
• Integrating multi-row high-load organiser banks alongside TC50 single organisers
Specifications
| Option* | Symmetric or Asymmetric |
| Total width (mm) | 52 |
| Recommended line - Max Ø (mm) | 14 |
| Total height (mm) | 66 |
| Fixing hole spacing (mm) | 56 |
| Total length (mm) | 155 |
| Sheave Ø (mm) | 50 |
| Mounting fasteners | M8 CSK Head (supplied) |
| Sideplate material | Composite |
| Sheave material | Alloy |
| SWL (kg) | 1000 |
| NBL (kg) | 2000 |
| Weight (g) | 620 |
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