Once known as Hartley18
Join Date: Aug 2007
Location: Melbourne, Australia
Thanked 85 Times in 85 Posts
Rep Power: 11
Denise, you didn't say how sheltered your anchorage is, but it's not improbable that your boat is riding over the chain if there is wind against tide. You'd have to sleep overnight to find out and then have a look when you hear grinding noises!
One solution is to slide a length of ~2" clear plastic tubing (the sort of cheap rubbish you get from hardware stores) over the chain for the first 15'-20' or so from your bow roller. To stop the "sleeve" sliding down the chain, use a cable tie through one of the links.
A bad day on a boat beats a good day in the office