72mm Synchro Jamming Footblock
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LEWMAR72mm Synchro Jamming Footblock


In stock online.
Only 4 in stock!
Model # 13062096 | Mfg # 29927264BKUPC # 743683204838
72mm Synchro Jamming Footblock




72mm Synchro Jamming Footblock

Name Value
Becket No Becket
Diameter 1/2 Inch or 13 mm
Direction Any
Integral Cleat Integral Jammer
Mount Type Mechanical Fasteners
Ratchet Non Ratcheting
Safe Working Load 2420 Pounds
Sheave Diameter 72 mm
Type Single Cheek/Foot
Weight 8.8 Ounces

Product Overview

A unique block that is synchronized with running rigging systems.

The 72mm footblock with jammer is ideal for spinnaker sheets, travelers and more. The larger sheave diameter works well with up to 1/2" lines.

Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance that’s comparable to ball and roller bearing blocks used in racing—but at a more affordable price. Designed to optimize the relationship between block and line, these blocks maximize efficiency and reduce wear to both line and block. The cheek block or footblock version of these popular blocks feature a solid aluminum base to protect the sheave and bearing from possible sealant egress and an aluminum cheek for additional durability and strength. Available with or without jammer.

Synchro blocks use a larger sheave that features the Free Spin bearing. The bigger diameter sheave prevents distortion and reduces line wear while the Free-Spin bearing handles higher static loads.

Designed to be synchronized with your boat’s running rigging systems, Lewmar Synchro blocks are an ideal choice for the sailor looking to get more for less: racing features at a cruising price.

Key Features

  • Plain bearing block with ball bearing like performance
  • Highly efficient free-spin bearing reduces drag
  • Solid aluminum base prevents sealant egress into sheave or bearing
  • Molded insets in base hold sealant close to fasteners to maintain seal while under load
  • Aluminum cheek for added strength and durability
  • Compatible with 3/8"—1/2" line
  • Standard equipment on newer racer/cruiser sailboats including Beneteau
  • Ideal for:
    • Travelers
    • Spinnaker sheets and guys
    • Can be used with angled pad to improve scope

Selection Guide

Sheave DiameterLine Range
50mm1/4"—3/8" (6mm—10mm)
60mm5/16"—3/8" (8mm—10mm)
72mm3/8"—1/2" (10mm—12mm)
90mm1/2"—9/16" (12mm—14mm)


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