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Description
Ronstan Series 40 Ball Bearing Block - Fiddle - Becket - CleatSeries 40 Ball Bearing Block Fiddle Becket Cleat Features: Low friction Acetal or Torlon bearing system Lightweight Cheek cut outs for easy bearing maintenance Captive Lock universal head Slotted pin shackle eliminates fouled lines Snap fit removable becket pin Multi position cleat arm Low friction, 2 stage ball bearing system High static and dynamic load capacity Lightweight Cheek cut outs for easy bearing maintenance Sheaves running on Acetal or
Series 40 Ball Bearing Block - Fiddle - Becket - Cleat
Features:
- Low friction Acetal or Torlon® bearing system
- Lightweight
- Cheek cut-outs for easy bearing maintenance
- Captive Lock™ universal head
- Slotted pin shackle eliminates fouled lines
- Snap fit removable becket pin
- Multi-position cleat arm
- Low friction, 2-stage ball bearing system
- High static and dynamic load capacity
- 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.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position. Becket pin is removable so line can be spliced prior to fitting and is i
Applications:
- Mainsheet
- Halyard
- Vang
- Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
- Typically used in direct 4:1 purchase systems such as mainsheets and boom vangs
- On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.
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
Manufacturer : Ronstan
Manufacturer Part No : RF40530
UPC : 9316800244201
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Replacement
Color: Black
Great product!
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Reviewed in the United States on May 17, 2026
★★★★★ 5
A Little Color Chaos, but My Teeth Don’t Mind
Color: Lavender
I grabbed these BURST replacement heads thinking they’d match my toothbrush perfectly — turns out, I’ve created a stylish little mix-and-match masterpiece. My brush now looks like it’s dressed for a rave, but honestly, I kind of love it.
Despite the color confusion, these heads work great. They snap on easily, feel sturdy, and leave my teeth feeling squeaky clean like I just left the dentist (minus the awkward small talk).
they may not match, but they definitely make my smile shine.
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Reviewed in the United States on March 23, 2026
★★★★★ 4
UPDATE:Replacement brush DOES NOT FIT well! Customer service difficulties.
Color: Rose Gold
I bought a burst toothbrush about seven month ago from Amazon for $99. (Now they are about $70). I subscribed to the burst website so I could have my toothbrush unit under warranty. I’ve been receiving replacement heads from them directly which is slow and spotty. But they did arrive (I replace the heads every two to three months). This week I received my brush head and it did NOT fit the unit. I emailed the company directly and still have not heard what they are going to do. In the meantime I ordered the three pack replacement heads from Amazon since they are quick and reliable on prompt delivery. So again- opened it up and it BARELY FIT. I had to jamb the head onto the unit. I’m honestly not sure if it will come off again. I guess I’ll figure that out in three more months 🤨. The Burst seems like a decent toothbrush- although my hygenist wasn’t sure it’s as good as oralB or sonicare. I frankly got tired of sonicare breaking very quickly and the last one was $200! That’s why I switched. I hope they will resolve this manufacturing problem. I like the unit, it’s gentle on my sensitive gums and it holds a charge a really long time. And to be clear I ordered the BURST heads, not the knockoffs from China. I hope I can continue to be a customer. The prior replacement heads have always worked and went on easily. UPDATE: customer service reached out to me - which I truly appreciate!! After using the head for a few weeks it loosened up (in a good way). Not sure why it was too tight initially- but it’s all good now. I will continue to support Burst 💥 oral care. I added a star ⭐️ to my prior review to reflect the good customer service. They also replaced my first defective head that got me started on this “rant”.
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Reviewed in the United States on April 12, 2023
★★★★★ 5
Improves oral hygiene!
Color: Black
Works great with my Burst toothbrush! Replacing the brush heads is so much easier than purchasing a new toothbrush. I’ve definitely noticed an improvement in my oral hygiene since switching to the Burst products.
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Reviewed in the United States on April 9, 2026
★★★★★ 5
FAST SHIPPING
Color: Black
they brush my teeth fine. They don't brush my tongue the greatest
but i use a regular toothbrush for that. It cleans my gums and teeth
very well much better then a toothbrush does.
The battery last SOOO long.... months!
Fast shipping
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Reviewed in the United States on April 28, 2026