Ronstan RF50101 Series 50 Ball Bearing Block with Single Loop Top, 2-Inch Sheave

Series 50 Ball Bearing Block - Single Loop Top

Sheaves running on Acetal or Torlon ball bearings provide high performance low friction. The 2-stage ball bearing system provides consistent performance over the full load range.

Features:

• Low friction, 2-stage ball bearing system
• High static and dynamic load capacity
• Lightweight
• Cheek cut-outs for easy bearing maintenance

Specifications:

• Max. Rope diameter (in): 1/2
• M.W.L. (lb): 1100lbs
• Sheave diameter (in): 2
• B.L. (lb): 3310lbs
• Weight (oz): 3.4oz

Materials:

• Acetal ball bearings
• UV-stabilized acetal sheave
• Grade 316 stainless steel load strap and head fitting
• Impact and UV-resistant, fiber-reinforced nylon cheeks

Ronstan RF50101 Series 50 Ball Bearing Block with Single Loop Top delivers smooth, low-friction line handling for sailing and marine rigging applications. Designed for use with rope up to 1/2 inch in diameter, this lightweight single-loop-top block combines a two-stage ball bearing system with durable marine-grade materials for consistent performance across its rated load range.

The Acetal ball bearings and UV-stabilized Acetal sheave help support efficient operation, while the Grade 316 stainless steel load strap and head fitting provide a robust connection point. Impact- and UV-resistant, fiber-reinforced nylon cheeks help protect the assembly in demanding marine environments. Cheek cut-outs also make bearing maintenance easier, helping simplify servicing when needed.

Key Features:

• Low-friction, two-stage ball bearing system for consistent performance over the full load range
• High static and dynamic load capacity for demanding line-handling applications
• Lightweight construction for easier installation and reduced rigging weight
• Cheek cut-outs provide convenient access for bearing maintenance
• Single loop top configuration for straightforward attachment

Product Details:

• Brand: Ronstan
• Part number: RF50101
• Product type: Series 50 single-loop-top ball bearing block
• Maximum rope diameter: 1/2 inch
• Sheave diameter: 2 inches
• Maximum working load: 1,100 pounds
• Breaking load: 3,310 pounds
• Weight: 3.4 ounces
• Ball bearing material: Acetal
• Sheave material: UV-stabilized Acetal
• Load strap and head fitting: Grade 316 stainless steel
• Cheek material: Impact- and UV-resistant, fiber-reinforced nylon

Choose the Ronstan RF50101 Series 50 Ball Bearing Block when you need a compact, lightweight marine block with smooth operation, durable materials, and practical bearing maintenance access.

SEO Meta Description: Ronstan RF50101 Series 50 ball bearing block with a single loop top, 2-inch sheave, low-friction operation, and 1,100-pound working load.