www.lewmar.com 20 40 60 80 100 Budget Conventional Synchro 6 5 4 3 2 1 % Efficiency achieved of input load Budget Number of Blocks Conventional Synchro 30° Synchro Blocks For more info refer to page 151 Suitable Snap Shackles Cleat Used Pad Eyes Wide range of pad eyes available, refer to page 320 for more information For information about block upstand refer to p 315 Suitable Block Upstands Spring upstand 29904050 fits 50mm Synchro Rubber boot upstand kit 29195065 fits 60mm Synchro 29196065 fits 72mm Synchro 29197265 fits 90mm Synchro Head Design Head can be positioned for use in line or at 90 degrees – or left to rotate freely when in unlocked position. When locked allows 30° “float” on shackle post to improve alignment of block. Higher efficiency – for faster sail handling and less rope wear Independent tests show Synchro blocks offer increased efficiency over conventional designs. Calculations over a 6-block mainsheet system, indicated Synchro blocks can deliver up to 40% greater efficiency than budget products – resulting in better responsiveness and improved sailing performance. Efficiency improvements in multi block systems Post diameter Max pin diameter Shackle Post Dimensions Line Size Suitable Traveller Upstand FIT SNAP SHACKLE 50mm Synchro 29925040 60mm Synchro 29926040 72mm Synchro 29927240 90mm Synchro 29929040 FIT TRAVELLER UPSTAND 50mm Synchro 60mm Synchro Size 1 NTR 72mm Synchro Size 1 HTX/ Size 2 NTR 90mm Synchro Size 2 HTX/ Size 3 NTR USE CLEAT WORKING LOAD LIMIT kg lb 50mm Synchro 29104100BK 120 264 60mm Synchro 29104110BK 180 396 72mm Synchro 29104110BK 180 396 OPTIMUM LINE SIZE MAX LINE SIZE mm in mm in 50mm Synchro 6 1∕4 10 3∕8 60mm Synchro 8 5∕16 10 3∕8 72mm Synchro 10 3∕8 12 1∕2 90mm Synchro 12 1∕2 14 9∕16 POST DIAMETER TO FIT MAX PIN Ø mm in mm in 50mm Synchro 7.9 5∕16 4 5∕32 60mm Synchro 9.4 3∕8 5 3∕16 72mm Synchro 11.9 15/32 6 1/4 90mm Synchro 16.5 21/32 9.8 3/8
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