A journey in crimping technique: I started my journey in crimping in the late '70s using full size A..C..D&F silverlocks with a fullsize bench crimper ( 24") in mono from 250# Jinkai ,to custom made 1200# 3.3mm. Then later, when the mini-locks became available I started using them with a Jinkai SC-3 crimper . In each case I proof tested the constructions to determine optimum settings. Late last year 2011 , Marc77 responded to a post about crimp strengths & we started corresponding about crimping and Marc sent some of his crimp joins for testing ( they were indeed the strongest testing crimp joins I had seen ) . Marc then provided some crimp joins using the same materials & equipment in configurations I requested. Marc is an accomplished & experienced crimp user. The results were interesting & led to a further series of tests with a crimping rig I designed & made where I could set the load pressure on the crimping handles. The original samples Marc provided were of a crimped swivel ( to suit Paulus's line test machine) using a join method of his own design and a crimping tool where he had modified the hole to optimise the results as he tested and evolved his technique. His results were extremely good & led to questions about why they were so good & what components of the crimping dynamic contributed to his particular success. Marc had modified 2 significant components of the join a double pass loop thru the eye of the swivel with a single flemish twist in the eye & just enough compression of the crimp to generate enough friction to hold the package together. He was using a Momoi mini-lock crimp & a pair of 10" crimping pliers ( without depth adjustment). This crimping style was developed by Marc in association with Capt. Robert Wadsworth of the "Sunbeam Express" from Niantic, Connecticut. The average join strength was 92% of tested line BS. - all joins failed at the crossover of the flemish twist in the eye of the hook. This compares to approx 80% for a single crimped loop. A characteristic of this type of crimped loop join is that it can quickly generate friction on a hook eye etc & hold it in a fixed position. this is an advantage in some rigs & a disadvantage where a freeswinging hook is desired. So then I stated a series of tests to examine individual parameters in the crimping dynamic.and Marc was kind enough to provide a series of samples in the initial test series. The lines & crimps used are fundamentally irrellevant to the results & implications of each dynamic examined ( as they are the same within each test series & we are comparing like for like except for the join parameter we are testing.) Paulus did the line tests quoted in the discussions unless otherwise stated Each individual parameter will be discussed in its own post in the thread.