The Wichard #63117 is a strong and compact single sailing block designed for applications where a fixed head with clevis connection is preferred.

It combines a 45mm composite sheave with a robust plain-bearing system and is suitable for 10mm rope. Wichard specifically designs this range to withstand high loads and recommends it for relatively static operations.

45mm Sheave for 10mm Rope

The Wichard #63117 features:

Sheave Diameter: 45mm

Rope Diameter: 10mm

This combination provides a compact block suitable for a wide range of sailing control systems while retaining an impressive load capacity.

Plain Bearing Construction

The #63117 belongs to Wichard’s Plain Bearing Block range.

Its composite sheave runs directly on a stainless-steel bush, creating a simple and robust bearing system. Wichard specifically highlights this construction for its ability to withstand high loads and its suitability for static operations.

This makes the block particularly useful when strength and durability are more important than the extremely low friction required in fast-running, lightly loaded systems.

Fixed Head with Clevis

A key feature of the #63117 is its:

Fixed Head with Clevis

Unlike the swivel version, the head remains in a fixed orientation.

The clevis provides a practical and secure connection point for compatible sailing hardware, making this model a good choice when the direction of the rope is already defined and rotation of the block around the attachment point is not required.

The result is a simple, compact and strong attachment configuration.

400kg Working Load

Despite its compact 45mm size, the Wichard #63117 provides a:

Working Load: 400kg

This gives the block substantial capacity for demanding sailing applications. Wichard defines this working-load figure specifically for nautical use.

700kg Breaking Load

The manufacturer specifies:

Breaking Load: 700kg

The breaking load should not be used as the normal operating limit. Selection and operation should always be based on the 400kg working load and the requirements of the complete installation.

Marine-Grade Materials

Wichard uses materials selected for demanding marine environments.

The #63117 features 316L stainless-steel head components and load straps, POM cheeks and a composite sheave. The terminal attachment components are also specified in 316L stainless steel.

This construction combines:

Strength + Corrosion Resistance + Low Weight

The lightweight cheeks also protect the sheave while helping keep the complete block compact.

Weight Only 89g

The Wichard #63117 weighs just:

89g

Combined with its 400kg working load, this gives the block an excellent strength-to-weight ratio for sailing applications.

Compact Dimensions

The block measures:

Length: 87mm
Width: 49mm
Thickness: 26mm

These compact dimensions make it easy to integrate into sailing systems where installation space is limited.

Technical Specifications

All specifications above are provided by Wichard for part #63117.

Multiple Sailing Applications

Wichard lists the #63117 range for several important sailing applications, including:

• Mainsheet systems
• Halyards
• Boom vangs
• Downhauls
• Mast-head block applications

This versatility makes the block suitable for both new installations and upgrades to existing sailing control systems.

Why Choose a Fixed Head?

A fixed head is useful when the installation already provides the correct block orientation and additional rotation is unnecessary.

Compared with a swivel configuration, it provides a straightforward connection with fewer moving elements.

For installations where the rope approaches the block from a predictable direction, this can provide a simple and efficient solution.

Why Choose the Wichard #63117?

• Premium Wichard sailing block
• 45mm composite sheave
• Designed for 10mm rope
• Robust plain-bearing construction
• Sheave runs on a stainless-steel bush
• Designed to withstand high loads
• Ideal for relatively static operations
• Fixed head
• Clevis attachment
• 400kg working load
• 700kg breaking load
• Weight only 89g
• Compact 87 x 49 x 26mm dimensions
• 316L stainless-steel structural components
• Suitable for mainsheets and halyards
• Suitable for boom vangs and downhauls
• Suitable for mast-head applications
• Made in France

Compact Design with High Load Capacity

The Wichard Single Plain Bearing Block 45mm with Fixed Head and Clevis #63117 is an excellent option when you need a compact block with a fixed, secure attachment and high working capacity.

Its 45mm sheave handles 10mm rope, while the plain-bearing construction is designed to withstand demanding loads. With a 400kg working load and weight of only 89g, the #63117 delivers an excellent combination of strength, simplicity and low weight.