Blog - Ronstan Industrial

Ropes Are Strong, But This Heavy-Duty Pulley Block Hangs With the Best

There’s a problem in rigging equipment: modern synthetic fiber ropes are almost unbelievably strong. Advanced high-modulus polyethylene (HMPE) fiber ropes like Dyneema® have 15 times the breaking strength of steel (pound-for-pound) at only 15% of a steel cable’s weight (at the same diameter). 

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Safe Working Load vs. Breaking Strength for Lashing Blocks & Loops

Soft attachment blocks provide a number of unique advantages over mechanically fastened pulleys.  The foremost is versatility. Lashing blocks can be secured in diverse locations, without hardware or metal fasteners—just a rope loop.

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The Hidden Cost of Friction: Infographic

Pulleys are wheels, but they’re not frictionless. Sheaves rest on axles, bushings, and bearings that contact a pulley block. As that pulley rotates, any friction in the system will slow it down. Even small differences in pulley friction can have a massive impact on loads. But how much? What happens...

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Maximum Loads in Stage Rigging: How Hardware and Ropes Work Together

The stage rigging basics have changed significantly since the old hemp systems of the “Golden Age of Sail” (1850-1900).  For starters, riggers have far more choice of materials in hardware and soft goods today.  Hemp, wood, leather, canvas, and metal have given way to thermoplastics and synthetic...

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5 Advantages of a High Safety Factor For Industrial Rigging Equipment

Most industries prefer a 10:1 safety factor of breaking load to expected load for industrial rigging equipment.  In other words, if most tasks in general use will involve burdens of around 100 lb on the equipment, it should be able to support a maximum load of 1,000 lb before breaking.

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How to Fight UV Degradation in Industrial Pulley Systems

Outdoor industrial pulley systems are exposed to intense ultraviolet radiation throughout their service life. Without proper protective measures, the absorption of these rays will cause UV degradation (cracking and disintegration over time) to natural and synthetic polymers alike.

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Why Use Marine-Grade Materials For Entertainment Rigging?

Entertainment rigging is comprised of two main branches, both of which benefit from marine-grade materials: theatrical rigging and arena rigging. Both call for the same rigging skills, but they differ in the conditions under which the equipment must operate.

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Different Types of Blocks, Pulleys, and Ropes and How They Work Together

The many possible combinations of pulleys, blocks, ropes, and other hardware for your system can make the process of selecting and assembling the ideal equipment daunting, but that doesn’t mean it’s any less important.  

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Solid Bearing vs Ball Bearing Pulley Blocks

Load type is a major consideration that affects which block to use in your pulley system. Static loads are stationary, applying their weight consistently to the same area of the bearing, but dynamic loads are often in motion and require a bearing that can evenly distribute that force.

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Types of Pulley Systems: Block and Tackle Rigging at Work

Through the centuries the block and tackle system has been optimized to meet the evolving needs of the professionals who use it. Today, block and tackle systems power innumerable daily tasks from recreational yachting to helicopter rescues and more. Here’s a closer look at how the system works and...

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Ronstan’s end-to-end design, manufacture and distribution operation delivers high specification products for all serious hardware applications.

Our state-of-the-art design facilities and manufacturing plant handles more than 4.9 million units each year.

As one of the top three sailboat hardware brands globally we know what it is like to deliver great equipment that can handle challenging conditions.