Lewmar 72mm Synchro Fiddle Block with Becket & Cam – Black | 29927239BK
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Lewmar 72mm Synchro Fiddle Block with Becket & Cam – Black
The Lewmar Synchro 72mm Fiddle Block with Becket and Cam Cleat is built for high-load sailing control systems where strong mechanical advantage and fast, secure line control are both essential. The fiddle configuration stacks two sheaves in a compact vertical arrangement, the integrated becket provides a line termination point for multi-part purchase systems, and the cam cleat lets you hold or release the working line instantly without reaching for a separate cleat.
Lewmar’s Synchro free-spin bearing technology minimizes friction under load, while the stainless steel strap and marine-grade composite construction are built to handle the demands of performance cruising and racing.
Specifications
- Part Number: 29927239BK
- Sheave Diameter: 72 mm
- Configuration: Fiddle (double sheave, vertical) with becket and cam cleat
- Line Diameter: 3/8" – 1/2" (10 mm – 13 mm)
- Working Load Limit: 2,420 lbs (1,100 kg)
- Finish: Black marine-grade composite
- UPC: 743683203855
Features
- Fiddle configuration — compact vertical twin-sheave layout for high purchase in tight spaces
- Integrated becket for line termination in multi-part purchase systems
- Cam cleat for fast, secure line hold and release from the trimming position
- Synchro free-spin bearing technology — smooth, low-friction operation under high static loads
- Stainless steel strap for strength and corrosion resistance
- Adjustable swivel configuration — set for fixed or rotating operation
- Black marine-grade composite construction
Compatible Applications
- Mainsheet systems requiring high purchase and built-in line control
- Boom vang and kicker systems
- Fine-tune controls and cascade purchase arrangements
- High-load running-rigging systems on performance cruisers and racing sailboats
- Applications requiring compact mechanical advantage with 3/8"–1/2" line
Fitment Note
Confirm the 72 mm block size, 3/8"–1/2" line range, 1,100 kg working load, attachment configuration, becket arrangement, and cam-cleat orientation before replacing or upgrading existing running rigging. Actual loads vary considerably with vessel size, sail area, and purchase configuration.
Related Products
- Lewmar 72mm Synchro Fiddle Block – Black (no Becket or Cam)
- Lewmar 72mm Synchro Fiddle Block with Becket – Black
- Lewmar 72mm Synchro Fiddle Block with Cam – Black
- Lewmar 60mm Synchro Fiddle Block with Becket – Black
- Lewmar 60mm Synchro Fiddle Block with Cam – Black
- Lewmar 72mm Synchro Triple Block – Black
Parts Desk Insights
Best use case: This is the go-to block for mainsheet and boom vang systems on mid-size to larger sailboats where you need high purchase, a built-in line termination point, and the ability to cleat off quickly — all in a single compact unit. The fiddle layout keeps the block short and manageable even in tight traveler or boom-end installations.
When replacing or upgrading, don’t just match the outside size. Confirm the line diameter (3/8"–1/2"), working load (1,100 kg), becket arrangement, and cam-cleat orientation against your existing system. Getting the cam position wrong relative to your trimming angle is a common fitment issue that’s easy to overlook on paper. If your loads or line sizes are smaller, the 60mm Fiddle with Becket may be the better fit.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.