Ronstan Series 50 All Purpose Double Block RF51200 with Swivel Shackle

Series 50 All Purpose Block - Double

All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Swivel shackle head for full 360 degree rotation (non-locking).

Features:

• Exceptionally high working loads
• Low maintenance long service life
• Self-lubricating Acetal polymer sheave ensures low friction and extreme durability
• Slotted pin shackle eliminates fouled lines

Applications:

• Mainsheet and halyard applications, vang and spinnaker control lines on boats to (33ft). 10m
• S60 - on boats up to 40ft, (12m)

Materials:

• Grade 316 stainless steel load strap
• Impact and UV resistant, fiber reinforced Nylon cheeks

Specifications:

• Sheave Diameter: (inch) 2" / (mm) 50
• Max Rope Diameter: (inch) 1/2" / (mm) 12
• Pin Diameter: (inch) 1/4" / (mm) 6
• Maximum Working Load: (lb) 2200 / (kg) 1000
• Breaking Load: (lb) 4410 / (kg) 2000
• Weight: (oz) 9.0 / (g) 255

Ronstan Series 50 All Purpose Double Block RF51200 provides a dependable solution for cruising and racing sailors who need efficient control of sheets, halyards, vang lines, and spinnaker control lines. Designed for dynamic and high static loads, this double block combines a self-lubricating Acetal polymer sheave with durable stainless steel and reinforced Nylon components for smooth operation, reduced maintenance, and long service life.

The swivel shackle head rotates 360 degrees to help align the block with changing line directions during sailing. Its non-locking design supports versatile rigging, while the slotted pin shackle helps eliminate fouled lines. The self-lubricating sheave is engineered for low friction and durability, making this Ronstan sailing block a practical choice for demanding onboard applications.

Key Features:

• High working load capacity: Supports demanding sheet, halyard, and control line applications.
• Self-lubricating Acetal polymer sheave: Helps provide low friction and durable performance.
• 360-degree swivel shackle head: Allows full rotation for flexible line alignment.
• Slotted pin shackle: Helps prevent fouled lines during use.
• Durable construction: Combines a Grade 316 stainless steel load strap with impact- and UV-resistant, fiber-reinforced Nylon cheeks.

Product Details:

• Brand: Ronstan
• Series: 50
• Product type: All purpose double block
• Part number: RF51200
• Sheave diameter: 2 inches
• Maximum rope diameter: 1/2 inch
• Pin diameter: 1/4 inch
• Maximum working load: 2,200 pounds
• Breaking load: 4,410 pounds
• Head style: Non-locking swivel shackle
• Intended applications: Mainsheets, halyards, vang lines, and spinnaker control lines
• Recommended boat use: Boats up to 33 feet for listed applications; S60 applications on boats up to 40 feet

Choose the Ronstan Series 50 All Purpose Double Block RF51200 for reliable line handling and versatile performance aboard cruising and racing sailboats.

SEO Meta Description: Ronstan Series 50 RF51200 double block with swivel shackle, low-friction Acetal sheave, and 2,200-pound working load for sailboats.

Features:

• High working load capacity: Supports demanding sheet, halyard, and control line applications.

• Self-lubricating Acetal polymer sheave: Helps provide low friction and durable performance.

• 360-degree swivel shackle head: Allows full rotation for flexible line alignment.

• Slotted pin shackle: Helps prevent fouled lines during use.

• Durable construction: Combines a Grade 316 stainless steel load strap with impact- and UV-resistant, fiber-reinforced Nylon cheeks.