Chainsaw chains don't last forever, and you can only sharpen them about 10 times or so before you'll have to replace the entire chain. With the extra power of rotary tools like a Dremel ...

Lift the chain off the saw bar ... This isn't necessary for new wheels. The post How To Sharpen a Chainsaw The Easy Way ...

you can buy a $60 kit that's compatible with most major-brand chain saws and lets you sharpen the saw yourself in seconds. Sold at Home Depot, Sears, and other retailers, Oregon's PowerSharp comes ...