Click to enlargeSchaefer Series 3 Flat Base/Alum Cheek/Delrin Sheave
Manufacturer: Schaefer MarinePart #: 303-09SKU: 74707
- 1000 lb
- Stainless Steel
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Item #: 74707
Category: Blocks
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Description
Series 3 Flat Base/Alum Cheek/Delrin Sheave Delrin™ plain bearing sheave ensures smooth operation and high safe working load. Stainless Steel base distributes loads to a larger surface area.
Specifications: Sheave Dia. 1-7/16" (37 mm) Max Line 7/16" (11 m) Length 2-7/8" (73 mm) Width 1-3/4" (44 mm) Height 3/4" (19 mm) Fasteners (4) #10- RH (5 mm) C/C 2-3/8" (60 mm) SWL 1000 lbs.
(450 kg) Weight Alum. 2.
5 oz. (71 g)
Specifications
| Brand | Schaefer Marine |
|---|---|
| Part Number | 303-09 |
| EverTide SKU | 74707 |
| UPC | 740507003240 |
| Material | Stainless Steel |
Specifications are provided by the manufacturer. Confirm fitment for your application before ordering, or contact us and we'll help.
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Returns are accepted within 30 dayson items that are unused and in their original packaging. Some items may be subject to a manufacturer restocking fee. Special-order items may not be eligible — if you're unsure, ask us before ordering.
Schaefer Marine productscarry the manufacturer's standard warranty. For a warranty claim or a return authorization, see our full returns policy or contact us.
Sailing — frequently asked
- How do I size a block for my sailboat?
- Match the block to the line diameter it will carry and to the working and breaking loads of the system (sheet, halyard, control line). Makers publish load ratings and line-size ranges — choose a block whose working load comfortably exceeds the real-world load, without going so large it adds needless weight.
- What is running rigging?
- Running rigging is the moving lines that control the sails — sheets, halyards, and control lines — as opposed to standing rigging (the fixed wire that holds up the mast). Running rigging should be matched to the boat’s blocks, clutches, and winches for smooth, reliable sail handling.
- How do I maintain sailboat winches and hardware?
- Rinse with fresh water after sailing, keep sheaves and bearings clean, and periodically service winches (disassemble, clean, and re-grease per the maker’s instructions). Marine-grade stainless and good maintenance keep hardware working smoothly when loads are high and timing matters.
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