b'Small 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 and automat- Block pivots around the line axis ically engage a ratchet mechanism as loads increase, giving sailors a holding powerto keep line entry height low.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. 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 kg21 8140 mm1 9/16401 3/4433 3/16812 1/8541.6453/81030013675034021 8240 mm/150 Cam-Matic*1 9/16402 9/16663 3/16813 1/28772003/81030013675034021 8340 mm/468 Micro Cam-Matic*1 9/16401 7/8483 3/16813 1/4824.11171/46200 91 400181214257 mm2 1/42504 5/161102 1/85451413/810500227718 571584 3/8300 214357 mm/150 Cam-Matic*2 1/4572 5/8664 5/161104 5/161101130410136600272 214457 mm Ratchamatic572504 5/161102 5/8665.51562271000554 2 1/43/810500 21452 1/4572 5/8664 5/161104 3/161063293/810136600272 57 mm Ratchamatic/150 Cam-Matic*12300 267875 mm3752 1/2645 5/83 3/4959.79/161475034024261100 143275 267975 mm/150 Cam-Matic*32 5/8665 5/81435 9/16141174859/1614300136600272 75 268875 mm Ratchamatic375645 5/81433 1/289113047/167503401500680 2 1/212 268975 mm Ratchamatic/150 Cam-Matic*3752 5/8665 5/81435 3/8185147/1612300136600272 137 *Maximum working loads and breaking loads for blocks based on cam strengths.31'