b'NEW 2181, 2182, 2183Small Boat 40, 57, & 75 mm Flip-Flop BlocksSmall Boat Flip-Flop blocks pivot around the line axis to keep line close to the deck. Hinged construction allows a variety of lead angles.Lightweight, machined 6061-T6 aluminum cheeks pivot on fiber-reinforced plastic chocks. Sheave runs exclusively on a ball bearing system for fast trim and release under any load. Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection. Ratchamatic block versions roll freely in both directions under low loads andBlock pivots around the line axis automatically engage a ratchet mechanism as loads increase, giving sailors ato keep line entry height low.holding power of up to 15:1. The ratchet engagement can be adjusted to a higher or lower load depending on the sailors strength, sailing style and system usage.Reversible cam arms adjust and lock in a range of positions for crew accessibility and accommodation of changing lead angles. All 57 mm and 75 mm Ratchamatic blocks are also available with Power3 sheaves which offer holding power options suitable for a variety of wind conditions. In addition, all 57 mm Ratchamatic blocks can be made with HTE (high threshold engage) sheaves to delay ratchet engagement, allowing them to run freely more of the time. Contact Harken for more information.2142 21432678 26792181 218221832144 21452688 2689Sheave Max line Maximum BreakingPartWidth Length Height Weightworking load loadNo. Description in mm in mm in mm in mm oz g in mm lb kg lb kg218140 mm1 9/16401 3/4433 3/16812 1/8541.6453/810300136750340218240 mm/150 Cam-Matic*1 9/16402 9/16663 3/16813 1/28772003/810300136750340218340 mm/468 Micro Cam-Matic*401 7/8483 3/16813 1/4824.11171/46200 91 400181 1 9/16 214257 mm2 1/4572504 5/161102 1/85451413/81050022715847184 5/16 214357 mm/150 Cam-Matic*2 1/4572 5/8661104 5/16110113043/810300136600272 214457 mm Ratchamatic2 1/4572504 5/161102 5/8665.51563/8105002271000554214557 mm Ratchamatic/150 Cam-Matic*2 1/4572 5/8664 5/161104 3/16106123293/810300136600272267875 mm3752 1/2645 5/81433 3/4959.72759/161475034024261100267975 mm/150 Cam-Matic*3752 5/8665 5/81435 9/16141174859/1614300136600272268875 mm Ratchamatic375645 5/81433 1/289113047/16127503401500680 2 1/2 268975 mm Ratchamatic/150 Cam-Matic*375665 5/81435 3/8137185147/1612300136600272 2 5/8 *Maximum working loads and breaking loads for blocks based on cam strengths.30'