CW55176 - Ronstan Series 30 Ball Bearing Orbit Block™ | Aztek Computers
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SKU: NT2RY93SHF |  Mfg. Part: CW55176  | UPC: 9316800404964  |  0 Reviews  |     Share

CW55176 - Ronstan Series 30 Ball Bearing Orbit Block™ - Cheek

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Condition: New

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Product Overview

Series 30 Ball Bearing Orbit Block™ - Cheek

Ball Bearing Orbit Blocks™ boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options.
Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fiber-reinforced composites in the block head, cleat arms and beckets.

Features:
  • Lightweight
  • Highest working load in its class
  • Secure, versatile and secure attachement
  • Low profile and compact


Applications:
  • Mainsheet systems and spinnaker sheets on dinghies to 5M(16')
  • Halyard, vang and backstay applications on boats to 5M(16')
  • Control line applications on larger yachts


Materials:
  • Sheave: High compression strength carbon black Acetal
  • Ball Bearings: High compression strength Acetal
  • Frame/Cheeks: Toughened, glass fiber reinforced Nylon
  • Link: UV stabilized, multi-strand impregnated SK75 Dyneema®


Specifications:
Sheave Ø:30mm(1-3/16")
Max. Rope Ø:8mm(5/16")
M.W.L.:300kg(660lbs)
B. L.:600kg(1,320lbs)
Weight:21g(0.7oz)


























Expert Overview

The Ronstan Series 30 Ball Bearing Orbit Block - Cheek, part number CW55176, is a compact and lightweight block designed for various marine applications. It features an all-composite reinforced polymer construction, contributing to its strength-to-weight ratio. The block utilizes precision-designed ball bearings made from high compression strength Acetal to minimize friction during operation. This product is suitable for mainsheet and spinnaker systems on dinghies up to 5 meters (16 feet), as well as halyard, vang, and backstay applications on boats of the same size. Additionally, it can be integrated into control line systems on larger yachts. Its low profile and secure attachment options make it a practical component for managing lines where space and weight are considerations. The block is constructed with a carbon black Acetal sheave, glass fiber reinforced Nylon frame, and an SK75 Dyneema link.

Technical Specifications

Series 30 Ball Bearing Orbit Block™ - Cheek

Ball Bearing Orbit Blocks™ boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options.
Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fiber-reinforced composites in the block head, cleat arms and beckets.

Features:
  • Lightweight
  • Highest working load in its class
  • Secure, versatile and secure attachement
  • Low profile and compact


Applications:
  • Mainsheet systems and spinnaker sheets on dinghies to 5M(16')
  • Halyard, vang and backstay applications on boats to 5M(16')
  • Control line applications on larger yachts


Materials:
  • Sheave: High compression strength carbon black Acetal
  • Ball Bearings: High compression strength Acetal
  • Frame/Cheeks: Toughened, glass fiber reinforced Nylon
  • Link: UV stabilized, multi-strand impregnated SK75 Dyneema®


Specifications:
Sheave Ø:30mm(1-3/16")
Max. Rope Ø:8mm(5/16")
M.W.L.:300kg(660lbs)
B. L.:600kg(1,320lbs)
Weight:21g(0.7oz)

Product Details

  • Manufacturer:
  • Model Number:
  • ASIN:
  • UPC:
  • Condition:
  • Weight:
  • Dimensions:
  • Updated:
  • Added:
  • Country of Origin:
  • Ronstan
  • CW55176
  • B005CB0174
  • 9316800404964
  • New
  • 1 lbs
  • 4 X 1 X 3
  • Aug 14, 2026
  • Apr 15, 2021
  • INDONESIA
Product Identifiers: Brand: Ronstan • Part #: CW55176 • UPC: 9316800404964 • ASIN: B005CB0174

Frequently Asked Questions

What is the maximum rope diameter this block can accommodate?

The Ronstan Series 30 Ball Bearing Orbit Block is designed to work with ropes up to a maximum diameter of 8mm (5/16").

What is the Maximum Working Load (M.W.L.) for this block?

This block has a Maximum Working Load (M.W.L.) of 300kg (660lbs), indicating the maximum load it can safely handle during normal operation.

What materials are used in the construction of the sheave and ball bearings?

The sheave is made from high compression strength carbon black Acetal, and the ball bearings are also constructed from high compression strength Acetal.

What are the primary applications for this block?

This block is suitable for mainsheet systems and spinnaker sheets on dinghies up to 5 meters (16 feet), halyard, vang, and backstay applications on boats up to 5 meters (16 feet), and control line applications on larger yachts.

CW55176 - Ronstan Series 30 Ball Bearing Orbit Block™ - Cheek

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