Description
Schaefer Series 5 Flat Base Block | Boat Supply Store
Designed for demanding marine applications, this Schaefer Series 5 block offers exceptional durability and smooth operation for your running rigging. Its 2" (51 mm) Delrin™ sheave minimizes friction under load, accommodating lines up to 7/16" (11 mm) with a rated Safe Working Load (SWL) of 1750 lbs (795 kg). The robust stainless steel base ensures superior load distribution and longevity, making it a reliable component for offshore cruising sailboats or performance dinghies operating in harsh coastal environments.
Key Features
- Low Friction Delrin™ sheave ensures smooth line passage and high load capacity.
- Robust Load Distribution Stainless steel base provides a large, stable mounting surface.
- Durable Construction Built to withstand rigorous marine environments and heavy use.
- Compact Design Offers high performance in a space-efficient form factor.
- High SWL 1750 lbs (795 kg) Safe Working Load suitable for critical rigging points.
- Versatile Line Capacity Accommodates lines up to 7/16" (11 mm) diameter.
- Lightweight Weighs only 5.9 oz (167g) without adding unnecessary bulk.
- Marine Grade Specifically engineered for sailing applications.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 2" (51 mm) |
| Max. Line Diameter | 7/16" (11 mm) |
| Safe Working Load (SWL) | 1750 lbs (795 kg) |
| Length | 3-5/8" (92 mm) |
| Width | 2-7/32" (57 mm) |
| Height | 7/8" (22 mm) |
| Fastener Requirement | (4) #10 RH fasteners |
| Fastener Center-to-Center Spacing | 3" (76 mm) |
| Weight | 5.9 oz (167g) |
| Sheave Material | Delrin™ |
| Cheek Material | Aluminum |
| Base Material | Stainless Steel |
Who This Is For
Sailors and boaters requiring a reliable, high-performance block for their running rigging. This block is particularly suited for those needing a durable and smooth-operating solution for lines up to 7/16" (11 mm).
How It Compares
| Feature | Schaefer Series 5 Flat Base Block | Harken Ronstan |
|---|---|---|
| Sheave Diameter | 2" (51 mm) | — |
| Max. Line | 7/16" (11 mm) | — |
| SWL | 1750 lbs (795 kg) | — |
| Sheave Material | Delrin™ | Carbo (composite) Nylon |
| Base Material | Stainless Steel | Composite Aluminum |
Common Concerns Answered
Will this block offer enough versatility for various rigging angles?
While this is a fixed-cheek block, its flat base design is optimized for secure mounting on flat surfaces. For applications requiring adjustable angles, consider blocks with swivel heads, though this design prioritizes robust, direct load bearing.
Is the mounting hardware included with this block?
Mounting hardware is not included with this block. It requires (4) #10 RH fasteners with a 3" (76 mm) center-to-center spacing, ensuring you can select the appropriate length and type for your specific hull or deck material.
What is the typical customer feedback regarding durability?
Customers consistently praise the durability and smooth operation of this Schaefer block. The combination of a high-strength Delrin™ sheave and a corrosion-resistant stainless steel base contributes to its longevity in demanding marine environments.
Frequently Asked Questions
What is the maximum line size this Schaefer block can accommodate?
The Schaefer Series 5 Flat Base block is designed to accommodate lines with a maximum diameter of 7/16" (11 mm).
What is the safe working load (SWL) for the Schaefer Series 5 block?
The Safe Working Load (SWL) for this Schaefer Series 5 block is 1750 lbs (795 kg).
What are the dimensions of the Schaefer Series 5 Flat Base block?
The Schaefer Series 5 Flat Base block has a length of 3-5/8" (92 mm), a width of 2-7/32" (57 mm), and a height of 7/8" (22 mm).
What type of sheave material does this Schaefer block use?
This Schaefer block utilizes a Delrin™ sheave, known for its excellent low-friction characteristics and high load-bearing capabilities.
What fasteners are recommended for mounting this Schaefer block?
For secure mounting, this Schaefer Series 5 Flat Base block requires (4) #10 RH fasteners with a center-to-center spacing of 3" (76 mm).
