Ronstan Series 40 Ball Bearing Block - Double - Becket - Swivel Head
This item is currently out of stock.
Special order from Ronstan — Estimated 2–4 weeks.
Description
Series 40 Ball Bearing Block - Double - Becket - Swivel Head
Features:
- Low friction Acetal or Torlon® bearing system
- Lightweight
- Cheek cut-outs for easy bearing maintenance
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.Features a swivel shackle head for full 360° rotation.
Applications:
- Mainsheet
- Halyard
- Vang
- Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
Accessories
No accessories listed for this product.
Specifications
| SKU | RF40210 |
| UPC | 9316800557370 |
| Brand | Ronstan |
| Category | Sailing |
| Country of Origin | — |
| Weight | 0.3 |
| Dimensions | 4 x 3 x 2 |
| Status | Active |
| Last Synced | 8/27/2026, 2:06:13 AM |
Compliance & Shipping
Product Literature
No literature or manuals available for this product.
Customer Reviews
0 reviews
Only customers who purchased this item can write a review.
No reviews yet. Purchased this item? Be the first to review it.
Frequently Bought Together
Compare Key Features
| Feature |  Ronstan Series 40 Ball Bearing Block - Double - Becket - Swivel Head CURRENT |  Ronstan Series 30 Ball Bearing Orbit Block™ - Cheek |  Ronstan Series 30 Ball Bearing Orbit Block - Triple - Becket |  Harken 40mm Carbo Block 90° Fixed Head |  Barton Marine Ratchet Block - 55mm |
|---|---|---|---|---|---|
| Price | $80.69 | $19.25 | $57.81 | $41.35 | $111.66 |
| Brand | Ronstan | Ronstan | Ronstan | Harken | Barton Marine |
| Condition | New | New | New | New | New |
| Availability | Out of Stock | In Stock | In Stock | In Stock | In Stock |
| Weight | 0.3 | 0.06 | 0.19 | 0.11 | 0.3 |
| Dimensions | 4 x 3 x 2 | 4 x 2 x 1 | 4 x 2 x 2 | 5 x 3 x 1 | 6 x 3 x 2 |
| SKU | RF40210 | RF35151 | RF35312 | 2659 | 90500 |
| Country | — | INDONESIA | INDONESIA | UNITED STATES | — |
| View Item | View Item | View Item | View Item | View Item |
You Might Also Need
More from Ronstan
View AllRelated Products
Customers Also Viewed
Frequently Asked Questions
Price
$80.69