Echo 57 volt chainsaw. I'm been using it all day cutting saplings out of a walnut grove beside the house.

It gave me some trouble early on because the .043 gauge blade that's recommended for it kept slipping out of the bar groove and coming off. I switched to a .050 chain and have had no problems since.

I was surprised it would fit. But it did. I lube the bar groove up good when I install a new chain and the bar will smoke for a few seconds, then it has a good fit into the bar.

Unorthodox,...but it works.