I was trained with an Oregon electric sharpener when I started out. I've only tried sharpening with a hand file once, and it seemed laborious to me, but I'm sure it's because I didn't know what I was doing. The handheld sharpener can definitely make a sharp chain, you just need to know what goes into a sharp chain to properly sharpen.
Another option is the Timberline chainsaw sharpener. It does a REALLY good job and doesn't require power, but it doesn't really save any time (It sharpens each tooth ridiculously fast, but you have to slide the chain and adjust for each tooth). I bought one because my workers just never seemed to master sharpening. One worker liked it a lot and it improved his sharpening quite a bit, but I still prefer to sharpen with the Stihl handheld sharpener. Overall, I was disappointed with this for the price point.
The Timberline Chainsaw Sharpener makes sharpening your chainsaw much easier and more precise. The Timberline Chainsaw Sharpener lets you sharpen your chain on the job. Allowing you to work f
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