Description
Schaefer 51mm Single Aluminum Block | Boat Supply Store
Engineered for demanding marine applications, this Schaefer single block addresses the need for reliable and smooth-running rigging components. Its anodized aluminum cheeks provide exceptional corrosion resistance, while the 51mm Delrin™ sheave ensures low friction operation under load. With a robust Safe Working Load (SWL) of 1750 lbs and a lockable swivel head, it offers precise control and prevents line twist on vessels ranging from dinghies to mid-sized cruisers operating in coastal or offshore environments.
Key Features
- Durable Anodized aluminum cheeks resist corrosion
- Smooth Operation Delrin™ sheave minimizes friction
- Versatile Control Lockable swivel head prevents unwanted twist
- High Capacity 1750 lbs Safe Working Load (SWL) for robust rigging
- Compact Design Optimized dimensions for efficient space utilization
- Lightweight Construction Reduces overall system weight at only 5oz
- Max Line Compatibility Accommodates lines up to 11mm (7/16")
- Trusted Performance Schaefer Marine engineering for reliable use
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 51mm (2") |
| Thickness | 24mm (15/16") |
| Width | 54mm (2 1/8") |
| Length | 112mm (4 13/32") |
| SWL | 1750 lbs (795kg) |
| Weight | 142g (5oz) |
| Max Line Size | 11mm (7/16") |
| Cheek Material | Anodized Aluminum |
| Sheave Material | Delrin™ |
Who This Is For
Sailors and boaters who require a reliable, durable, and smooth-operating single block for various rigging applications. It is ideal for those needing a block with a swivel head that can be locked to maintain line orientation.
How It Compares
| Feature | Schaefer 51mm Single Aluminum Block | Harken Single Block |
|---|---|---|
| Sheave Diameter | 51mm | — |
| SWL | 1750 lbs | — |
| Cheek Material | Anodized Aluminum | Aluminum, Nylon |
| Lockable Swivel Head | Yes | Varies by model, Varies by model |
Common Concerns Answered
Will the 51mm sheave be sufficient for my larger diameter lines?
The Schaefer Single Aluminum Block is rated for a maximum line size of 11mm (7/16"). For lines exceeding this diameter, a block with a larger sheave may be necessary to ensure optimal performance and prevent excessive wear.
How does the lockable swivel head compare to other brands?
While some competitors offer varying locking mechanisms, the Schaefer block provides a reliable and integrated lockable swivel head, ensuring your rigging remains precisely positioned without rotation.
Is the price of this block justified by its features?
The $87.99 price reflects the premium anodized aluminum construction, the durable Delrin™ sheave, and the functional lockable swivel head, offering significant value for a component designed for longevity and performance in harsh marine environments.
Frequently Asked Questions
What is the maximum line size this Schaefer single block can accommodate?
This Schaefer single block can accommodate lines up to 11mm (7/16").
What is the safe working load for the Schaefer 51mm single aluminum block?
The safe working load (SWL) for this block is 1750 lbs (795kg).
Can the swivel head on this block be locked?
Yes, the swivel head on this Schaefer single aluminum block is lockable to prevent unwanted rotation.
What are the dimensions of the Schaefer 51mm single aluminum block?
The dimensions are: Sheave Diameter: 51mm (2"), Thickness: 24mm (15/16"), Width: 54mm (2 1/8"), and Length: 112mm (4 13/32").
What material is the sheave made of in this Schaefer block?
The sheave in this Schaefer block is made of Delrin™ for smooth, low-friction operation.
