

Ronstan Series 50 Ball Bearing Block – Single Loop Top
$56.95 $51.26
Weight | 0.25 lbs |
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Series 50 Ball Bearing Block – Single Loop Top
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:
- Low friction, 2-stage ball bearing system
- High static and dynamic load capacity
- Lightweight
- Cheek cut-outs for easy bearing maintenance
Specifications:
- Max. Rope diameter (in): 1/2"
- M.W.L. (lb): 1100lbs
- Sheave diameter (in): 2"
- B.L. (lb): 3310lbs
- Weight (oz): 3.4oz
Materials:
- Acetal ball bearings
- UV-stabilized acetal sheave
- Grade 316 stainless steel load strap and head fitting
- Impact and UV-resistant, fiber-reinforced nylon cheeks


⚓ Smooth Sailing Shipping
Enjoy FREE standard shipping on most orders over $250 within the continental U.S. (excl. heavy/oversized/hazardous items).
We ship via UPS, FedEx, and USPS . Orders are processed in 1–2 business days with typical delivery in 1–5 business days .
🧭 Track The Voyage
You’ll receive tracking info by email once your order ships. If your package is marked “delivered” but not received, please wait 48 hours then reach out to our team.
🛟 Hassle-Free Returns & Exchanges
Returns accepted within 30 days of delivery. Items must be unused and in original packaging.
- Mistaken or damaged cargo? We’ll handle return shipping.
- Changed your course? Return shipping is on you.
- Report defects or damage within 7 days for a free exchange.
💰 Anchor Your Refund
Refunds go back to your original payment method within 5–7 business days after inspection.
📨 Contact the Crew
Questions about your order? Drop anchor at sales@marineelec.com .