Multi-Roller Chock Three Roller Chock for Marine Applications
A Multi-Roller Chock three roller chock, also known as a guide cable clamp fairlead, is an essential component in marine engineering. Its primary function is to redirect the cable’s path, minimizing the friction that occurs between the ship’s hull and the cable. This not only ensures smooth cable movement but also enhances the overall safety and efficiency of maritime operations.
In the realm of marine fairleaders, there are two main categories: fairleader rollers and belt rollers. Additionally, based on the opening types, chocks can be classified into vertical and oblique types. When it comes to roller chocks, they can feature one to three drums, and in some cases, even more than three.
Our three roller chocks are crafted from high-grade cast iron or cast steel. These materials are chosen for their exceptional durability, strength, and resistance to corrosion, making them well – suited for the harsh marine environment. Typically, these chocks are installed on the deck of a ship and the top of the bulwark, providing reliable support and guidance for cables.
CB*39 – 66 Cast Fairlead with Three Rollers: Detailed Specifications
The CB*39 – 66 cast fairlead with three rollers is a top – notch marine accessory designed to meet the rigorous demands of the industry. Below is a comprehensive table of its specifications, measured in millimeters (mm), which includes various dimensions and weight details for both cast iron and cast steel variants:
| Parameter | Cast Iron (150mm Wheel Diameter) | Cast Steel (150mm Wheel Diameter) | Cast Iron (170mm Wheel Diameter) | Cast Steel (170mm Wheel Diameter) | Cast Iron (185mm Wheel Diameter) | Cast Steel (185mm Wheel Diameter) | Cast Iron (200mm Wheel Diameter) | Cast Steel (200mm Wheel Diameter) | Cast Iron (230mm Wheel Diameter) | Cast Steel (230mm Wheel Diameter) | Cast Iron (250mm Wheel Diameter) | Cast Steel (250mm Wheel Diameter) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diameter of Wheel (mm) | 150 | 150 | 170 | 170 | 185 | 185 | 200 | 200 | 230 | 230 | 250 | 250 |
| Max Diameter of Tightwire (mm) | 20.6 | 20.6 | 30.5 | 30.5 | 33.5 | 33.5 | 37.5 | 37.5 | 43.5 | 43.5 | 48.5 | 48.5 |
| Circumference of Rope (mm) | 225 | 225 | 250 | 250 | 275 | 275 | 300 | 300 | 325 | 325 | 350 | 350 |
| L (mm) | 1520 | 1520 | 1660 | 1660 | 1880 | 1880 | 1930 | 1930 | 2170 | 2170 | 2340 | 2340 |
| B (mm) | 280 | 280 | 310 | 310 | 340 | 340 | 360 | 360 | 400 | 400 | 420 | 420 |
| H (mm) | 250 | 250 | 273 | 273 | 285 | 285 | 295 | 295 | 320 | 320 | 340 | 340 |
| h (mm) | 235 | 235 | 260 | 260 | 270 | 270 | 280 | 280 | 305 | 305 | 325 | 325 |
| r (mm) | 55 | 55 | 58 | 58 | 60 | 60 | 65 | 65 | 65 | 65 | 70 | 70 |
| A (mm) | 40 | 40 | 45 | 45 | 45 | 45 | 50 | 50 | 50 | 50 | 55 | 55 |
| A1 (mm) | 45 | 45 | 45 | 45 | 50 | 50 | 50 | 50 | 50 | 50 | 55 | 55 |
| A2 (mm) | 420 | 420 | 460 | 460 | 500 | 500 | 530 | 530 | 590 | 590 | 640 | 640 |
| A3 (mm) | 1430 | 1430 | 1570 | 1570 | 1700 | 1700 | 1830 | 1830 | 2070 | 2070 | 2230 | 2230 |
| A4 (mm) | 480 | 480 | 550 | 550 | 420 | 420 | 530 | 530 | 560 | 560 | 640 | 640 |
| d (mm) | 190 | 190 | 220 | 220 | 240 | 240 | 260 | 260 | 300 | 300 | 310 | 310 |
| Screw NO. | 8 | 8 | 8 | 8 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Weight (kg) – Cast Iron | 288 | – | 361 | – | 454 | – | 568 | – | 804 | – | 1049 | – |
| Weight (kg) – Cast Steel | – | 266 | – | 352 | – | 435 | – | 522 | – | 760 | – | 1051 |
FAQs about Multi-Roller Chock
Q1: What are the main advantages of using a Multi-Roller Chock in marine applications?
A: A three roller chock offers several key benefits. Firstly, it effectively changes the direction of the cable, allowing for more flexible cable routing on the ship. Secondly, by reducing the friction between the hull and the cable, it minimizes wear and tear on both the cable and the ship’s structure, extending their service lives. Moreover, it enhances the overall safety of maritime operations by ensuring smooth and controlled cable movement.
Q2: How do I choose between a cast iron and a cast steel three roller chock?
A: The choice between cast iron and cast steel depends on several factors. Cast iron chocks are generally more cost – effective and offer good corrosion resistance in normal marine environments. They are suitable for applications where the load requirements are moderate. On the other hand, cast steel chocks are stronger and more durable, making them ideal for heavy – duty applications or areas with high – stress conditions. If your ship operates in extremely harsh environments or needs to handle very large cables, cast steel chocks may be a better option.
Q3: Can the three roller chock be customized according to specific ship requirements?
A: Yes, many manufacturers offer customization services for three roller chocks. You can work with the manufacturer to adjust dimensions such as the diameter of the wheel, the maximum diameter of the tightwire, and other relevant parameters to meet the specific needs of your ship. This ensures that the chock fits perfectly into your ship’s cable management system and functions optimally.
Q4: How often should I inspect and maintain the three roller chock?
A: Regular inspection and maintenance are crucial for the long – term performance of the three roller chock. It is recommended to inspect the chock at least once every few months, especially before and after long – distance voyages. Check for signs of wear, corrosion, or damage to the rollers, the frame, and the mounting points. Lubricate the moving parts regularly to ensure smooth operation. If any significant damage is found, replace the chock immediately to avoid potential safety hazards.
Q5: Are three roller chocks compatible with different types of cables used in marine applications?
A: Three roller chocks are designed to be compatible with a wide range of cables commonly used in marine settings, such as steel wire ropes and synthetic ropes. However, it is important to select a chock with appropriate specifications, including the maximum diameter of the tightwire and the circumference of the rope, to ensure proper fit and function. Consult the manufacturer’s guidelines or seek professional advice if you are unsure about the compatibility of a particular chock with your cables.
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