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Description
Series 40 Ball Bearing Block - Single Upright Lead
Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision molded Acetal sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.
Applications:
- Typically used for halyards at the mast base.
Materials:
- Acetal ball bearings
- UV stabilized Acetal sheave
- Grade 316 stainless steel load housing
Accessories
No accessories listed for this product.
Specifications
| SKU | RF40171 |
| UPC | 9316800244249 |
| Brand | Ronstan |
| Category | Sailing |
| Country of Origin | — |
| Weight | 0.14 |
| Dimensions | 4 x 3 x 1 |
| Status | Active |
| Last Synced | 10/8/2026, 2:06:22 AM |
Compliance & Shipping
Returnable
Product Literature
No literature or manuals available for this product.
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Frequently Bought Together
Compare Key Features
| Feature |  Ronstan Series 40 Ball Bearing Block - Single Upright Lead CURRENT |  Ronstan Series 30 Ball Bearing Orbit Block - Triple - Becket |  Harken 57mm Carbo Air Block w/Swivel |  Barton Marine Ratchet Block - 55mm |  Harken 16mm Block |
|---|---|---|---|---|---|
| Price | $56.90 | $57.81 | $53.93 | $111.66 | $17.21 |
| Brand | Ronstan | Ronstan | Harken | Barton Marine | Harken |
| Condition | New | New | New | New | New |
| Availability | In Stock | In Stock | In Stock | In Stock | In Stock |
| Weight | 0.14 | 0.19 | 0.3 | 0.3 | 0.1 |
| Dimensions | 4 x 3 x 1 | 4 x 2 x 2 | 6 x 3 x 1 | 6 x 3 x 2 | 3 x 2 x 1 |
| SKU | RF40171 | RF35312 | 2600 | 90500 | 404 |
| Country | — | INDONESIA | UNITED STATES | — | UNITED STATES |
| View Item | View Item | View Item | View Item | View Item |
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Frequently Asked Questions
Price
$56.90