1. lots of people do it very fast on the eccentric and concentric. thats fine as long as you can stay tight, keep you form, and it doenst kill your joints. i cant do it that way, becuase of the said reasons. i use a controlled eccentric and on the concentric i push as hard and fast as i can. even if im using 185 lbs i push like im using 500 lbs.
2. in general my speed weights range from 40-60% of a RAW 1rm. currently i use about 45% with additional bands or chains, and around 50-55% with straight weight. start with 50% and adjust based on your speed, and how your max effort lifts are going. thats my rule of thumb, if my max effort lifts are going up then im using enough weight for speed bench, if they go down though, im using too much weight.
2. in general my speed weights range from 40-60% of a RAW 1rm. currently i use about 45% with additional bands or chains, and around 50-55% with straight weight. start with 50% and adjust based on your speed, and how your max effort lifts are going. thats my rule of thumb, if my max effort lifts are going up then im using enough weight for speed bench, if they go down though, im using too much weight.