Overview

This document provides technical specifications and details for baby stay or inner forestay attachments, specifically focusing on sheave boxes and internal tang fittings used in marine rigging applications.

Sheave Boxes Specifications

Key Points: The sheave boxes vary by bolt diameter, material (Nylon, Acetal, Delrin), and maximum rope diameter. All use two rivets and have specific cut lengths indicating the size of the fitting.

Internal Tang Fittings

Two types of internal tang fittings are described, designed for different profile sizes:

• For profiles I 137 to NG 51: Part number 31009201074, drilled at 12.5 mm, suitable for wire ropes up to 6 mm diameter. Uses 6 stainless steel rivets (part number 29002248140). Cut length: 76 x 6 mm.
• For profiles NG60 to NG105: Part number 31009201104, drilled at 14.5 mm, suitable for wire ropes up to 10 mm diameter. Uses 8 stainless steel rivets (part number 29002248180). Cut length: 102 x 8 mm.

Additional Notes: The internal tang fittings come in two-piece assemblies and are compatible with specific profile ranges. Detailed drawings and further information are referenced on page 103 of the original documentation.

Manufacturer Information

Produced by RDM Sparcraft, located in Périgny, France. Contact details include phone, fax, and email for technical support and ordering.

Summary of Critical Parameters

• Sheave box bolt diameters: 10 mm to 16 mm.
• Maximum rope diameters vary by material and model.
• Internal tang fittings designed for wire diameters up to 6 mm or 10 mm depending on profile.
• Use of stainless steel rivets for durability and corrosion resistance.
• Cut lengths and rivet counts specified for proper installation.

This document is essential for selecting and installing baby stay or inner forestay attachments with appropriate sheave boxes and internal tang fittings, ensuring compatibility with rigging profiles and wire sizes.