Originally Posted by quietstevens

My first experience was a 77mm pulley from DTK, the bearings failed, twice. Then I bought a 74mm pulley, bearings failed and then a 72mm pulley, the bearings failed much faster, I replaced them with better quality SKF bearings but they lasted only a year. I'm now thinking of going with a fixed pulley after installing an interchiller. The grease in the pulleys just can't seem to stay in place.