• RiaYer single swivel marine pulley block with 360 degree rotation head.
  • RiaYer swivel sailing block used for sailboat rigging, halyards, and control lines.
  • Detailed dimension drawing and size chart for RiaYer 35mm and 50mm marine pulleys.
  • Advanced materials: T316 stainless steel fittings and PA66 nylon body on RiaYer block.
  • Max line size compatibility for RiaYer high-capacity marine pulley blocks.
  • 1800 lbs safe working load limit for the 35mm RiaYer marine pulley.
  • 360 degree all-angle rotation feature of the RiaYer swivel marine pulley.
  • A durable black stainless steel single swivel pulley block. This heavy-duty hardware is designed for smooth rope hoisting and block and tackle systems.
  • A four-grid collage of luxury sailboats cruising on the ocean, demonstrating the ideal outdoor environment for marine-grade rigging hardware.
  • Detailed blueprint and specification chart providing exact dimensions for the heavy-duty black marine swivel pulley block series.
  • Component breakdown diagram of the black swivel pulley block, displaying its premium stainless steel parts and durable internal bearings.
  • Detailed graphic showcasing the high-capacity design and smooth internal rope guide mechanism of the black marine rigging pulley.
  • Technical graphic explaining the safe working load limit and heavy-duty lifting capabilities of the black marine-grade pulley block.
  • Infographic detailing the premium features of a heavy-duty black marine swivel pulley block, designed for sailing and industrial lifting.
RiaYer single swivel marine pulley block with 360 degree rotation head.
RiaYer swivel sailing block used for sailboat rigging, halyards, and control lines.
Detailed dimension drawing and size chart for RiaYer 35mm and 50mm marine pulleys.
Advanced materials: T316 stainless steel fittings and PA66 nylon body on RiaYer block.
Max line size compatibility for RiaYer high-capacity marine pulley blocks.
1800 lbs safe working load limit for the 35mm RiaYer marine pulley.
360 degree all-angle rotation feature of the RiaYer swivel marine pulley.
A durable black stainless steel single swivel pulley block. This heavy-duty hardware is designed for smooth rope hoisting and block and tackle systems.
A four-grid collage of luxury sailboats cruising on the ocean, demonstrating the ideal outdoor environment for marine-grade rigging hardware.
Detailed blueprint and specification chart providing exact dimensions for the heavy-duty black marine swivel pulley block series.
Component breakdown diagram of the black swivel pulley block, displaying its premium stainless steel parts and durable internal bearings.
Detailed graphic showcasing the high-capacity design and smooth internal rope guide mechanism of the black marine rigging pulley.
Technical graphic explaining the safe working load limit and heavy-duty lifting capabilities of the black marine-grade pulley block.
Infographic detailing the premium features of a heavy-duty black marine swivel pulley block, designed for sailing and industrial lifting.

360° Free Rotation Head. Hybrid T316 SS & PA66 Construction. Available in 35mm & 50mm.

Overview

Eliminate line twists and ensure smooth operation with the RiaYer Single Swivel Sailing Block. Featuring a precision-engineered 360° Swivel Head, this block automatically rotates to align with the load, drastically reducing friction on your lines. The construction utilizes a professional hybrid blend: T316 Marine-Grade Stainless Steel for the load-bearing straps and shackle, combined with a lightweight, wear-resistant PA66 Nylon body. Available in 35mm and 50mm sizes, it is the reliable choice for control lines, halyards, and mainsheets.

Key Features

  • 🔄 360° Free Swivel: The headpost rotates freely around its axis, allowing the block to turn and follow the direction of the rope. This prevents the line from jamming or twisting during operation.
  • ⚓ Hybrid Composite Build: Engineered for the marine environment—T316 Stainless Steel provides rust-proof strength for the shackle and straps, while the reinforced Nylon body reduces weight without sacrificing durability.
  • 💪 High Working Load: Compact yet powerful. The 35mm version supports a Working Load Limit (WLL) of 1,800 lbs, and the 50mm version handles up to 3,100 lbs (1406 kg).
  • ⚙️ Low-Friction Bearings: Equipped with smooth-running bearings that reduce resistance, making it easier to trim sails and adjust lines under heavy tension.
  • 📏 Two Professional Sizes: Precision-machined in 35mm (for up to 7/16" lines) and 50mm (for up to 1/2" lines) to perfectly match your specific rigging needs.

Specifications

Sheave Diameter 35mm (1-3/8") / 50mm (1-15/16")
Head Motion 360° Free Rotation
Max Line Size 7/16" (11mm) / 1/2" (12.7mm)
Working Load (WLL) 1,800 lbs (816 kg) / 3,100 lbs (1406 kg)
Body Length 2" (35mm) / 2-13/16" (50mm)
Body Width 1-3/8" (35mm) / 2" (50mm)
Total Thickness 7/8" (35mm) / 1-1/8" (50mm)
Pin Diameter 3/16" (Standard for both)

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RiaYer

RiaYer Single Swivel Sailing Block | Compact Marine Pulley (35mm/50mm)

SKU B0DFZ3LS6M
$15.99

360° Free Rotation Head. Hybrid T316 SS & PA66 Construction. Available in 35mm & 50mm.

Overview

Eliminate line twists and ensure smooth operation with the RiaYer Single Swivel Sailing Block. Featuring a precision-engineered 360° Swivel Head, this block automatically rotates to align with the load, drastically reducing friction on your lines. The construction utilizes a professional hybrid blend: T316 Marine-Grade Stainless Steel for the load-bearing straps and shackle, combined with a lightweight, wear-resistant PA66 Nylon body. Available in 35mm and 50mm sizes, it is the reliable choice for control lines, halyards, and mainsheets.

Key Features

  • 🔄 360° Free Swivel: The headpost rotates freely around its axis, allowing the block to turn and follow the direction of the rope. This prevents the line from jamming or twisting during operation.
  • ⚓ Hybrid Composite Build: Engineered for the marine environment—T316 Stainless Steel provides rust-proof strength for the shackle and straps, while the reinforced Nylon body reduces weight without sacrificing durability.
  • 💪 High Working Load: Compact yet powerful. The 35mm version supports a Working Load Limit (WLL) of 1,800 lbs, and the 50mm version handles up to 3,100 lbs (1406 kg).
  • ⚙️ Low-Friction Bearings: Equipped with smooth-running bearings that reduce resistance, making it easier to trim sails and adjust lines under heavy tension.
  • 📏 Two Professional Sizes: Precision-machined in 35mm (for up to 7/16" lines) and 50mm (for up to 1/2" lines) to perfectly match your specific rigging needs.

Specifications

Sheave Diameter 35mm (1-3/8") / 50mm (1-15/16")
Head Motion 360° Free Rotation
Max Line Size 7/16" (11mm) / 1/2" (12.7mm)
Working Load (WLL) 1,800 lbs (816 kg) / 3,100 lbs (1406 kg)
Body Length 2" (35mm) / 2-13/16" (50mm)
Body Width 1-3/8" (35mm) / 2" (50mm)
Total Thickness 7/8" (35mm) / 1-1/8" (50mm)
Pin Diameter 3/16" (Standard for both)
$15.99
Sheave Diameter:
Set Quantity:
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RiaYer single swivel marine pulley block with 360 degree rotation head. RiaYer swivel sailing block used for sailboat rigging, halyards, and control lines. Detailed dimension drawing and size chart for RiaYer 35mm and 50mm marine pulleys. Advanced materials: T316 stainless steel fittings and PA66 nylon body on RiaYer block. Max line size compatibility for RiaYer high-capacity marine pulley blocks. 1800 lbs safe working load limit for the 35mm RiaYer marine pulley. 360 degree all-angle rotation feature of the RiaYer swivel marine pulley. A durable black stainless steel single swivel pulley block. This heavy-duty hardware is designed for smooth rope hoisting and block and tackle systems. A four-grid collage of luxury sailboats cruising on the ocean, demonstrating the ideal outdoor environment for marine-grade rigging hardware. Detailed blueprint and specification chart providing exact dimensions for the heavy-duty black marine swivel pulley block series. Component breakdown diagram of the black swivel pulley block, displaying its premium stainless steel parts and durable internal bearings. Detailed graphic showcasing the high-capacity design and smooth internal rope guide mechanism of the black marine rigging pulley. Technical graphic explaining the safe working load limit and heavy-duty lifting capabilities of the black marine-grade pulley block. Infographic detailing the premium features of a heavy-duty black marine swivel pulley block, designed for sailing and industrial lifting.
RiaYer single swivel marine pulley block with 360 degree rotation head. RiaYer swivel sailing block used for sailboat rigging, halyards, and control lines. Detailed dimension drawing and size chart for RiaYer 35mm and 50mm marine pulleys. Advanced materials: T316 stainless steel fittings and PA66 nylon body on RiaYer block. Max line size compatibility for RiaYer high-capacity marine pulley blocks. 1800 lbs safe working load limit for the 35mm RiaYer marine pulley. 360 degree all-angle rotation feature of the RiaYer swivel marine pulley. A durable black stainless steel single swivel pulley block. This heavy-duty hardware is designed for smooth rope hoisting and block and tackle systems. A four-grid collage of luxury sailboats cruising on the ocean, demonstrating the ideal outdoor environment for marine-grade rigging hardware. Detailed blueprint and specification chart providing exact dimensions for the heavy-duty black marine swivel pulley block series. Component breakdown diagram of the black swivel pulley block, displaying its premium stainless steel parts and durable internal bearings. Detailed graphic showcasing the high-capacity design and smooth internal rope guide mechanism of the black marine rigging pulley. Technical graphic explaining the safe working load limit and heavy-duty lifting capabilities of the black marine-grade pulley block. Infographic detailing the premium features of a heavy-duty black marine swivel pulley block, designed for sailing and industrial lifting.

RiaYer

RiaYer Single Swivel Sailing Block | Compact Marine Pulley (35mm/50mm)

SKU B0DFZ3LS6M
$15.99
RiaYer single swivel marine pulley block with 360 degree rotation head.

360° Free Rotation Head. Hybrid T316 SS & PA66 Construction. Available in 35mm & 50mm.

Overview

Eliminate line twists and ensure smooth operation with the RiaYer Single Swivel Sailing Block. Featuring a precision-engineered 360° Swivel Head, this block automatically rotates to align with the load, drastically reducing friction on your lines. The construction utilizes a professional hybrid blend: T316 Marine-Grade Stainless Steel for the load-bearing straps and shackle, combined with a lightweight, wear-resistant PA66 Nylon body. Available in 35mm and 50mm sizes, it is the reliable choice for control lines, halyards, and mainsheets.

Key Features

  • 🔄 360° Free Swivel: The headpost rotates freely around its axis, allowing the block to turn and follow the direction of the rope. This prevents the line from jamming or twisting during operation.
  • ⚓ Hybrid Composite Build: Engineered for the marine environment—T316 Stainless Steel provides rust-proof strength for the shackle and straps, while the reinforced Nylon body reduces weight without sacrificing durability.
  • 💪 High Working Load: Compact yet powerful. The 35mm version supports a Working Load Limit (WLL) of 1,800 lbs, and the 50mm version handles up to 3,100 lbs (1406 kg).
  • ⚙️ Low-Friction Bearings: Equipped with smooth-running bearings that reduce resistance, making it easier to trim sails and adjust lines under heavy tension.
  • 📏 Two Professional Sizes: Precision-machined in 35mm (for up to 7/16" lines) and 50mm (for up to 1/2" lines) to perfectly match your specific rigging needs.

Specifications

Sheave Diameter 35mm (1-3/8") / 50mm (1-15/16")
Head Motion 360° Free Rotation
Max Line Size 7/16" (11mm) / 1/2" (12.7mm)
Working Load (WLL) 1,800 lbs (816 kg) / 3,100 lbs (1406 kg)
Body Length 2" (35mm) / 2-13/16" (50mm)
Body Width 1-3/8" (35mm) / 2" (50mm)
Total Thickness 7/8" (35mm) / 1-1/8" (50mm)
Pin Diameter 3/16" (Standard for both)

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Total price$134.95

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