Granberg Chainsaw Sharpener, G106B - Easy File-N-Joint Bar Mounted Guide System - Premium Chain Saw Blade Teeth Grinder Sharpening Tool Set - Portable Filing Hand Attachment Kit (Files Not Included)

Shortly after receiving this product I watched several videos online about its proper use. When I got it, I installed it on my bar and got to work making all the proper settings. Very quickly, the screw that adjusts the height of the file kept popping out as if it was stripped. I was very disappointed as this was a brand new purchase. I expected more from an American made product. I contacted the company (the contact number was easy to find on the included instructions). Someone who spoke fluent English with an accent typical of a person from northern California answered the phone and addressed my issue. He told me there had been a bad batch sent to Amazon with an improperly tapped thread on the part I was having trouble with. With no further questions, he got my information and said they would send out an entire upper assembly replacement at no charge. Great customer service! Painless! I'm still waiting for the part to arrive but I wouldn't expect it to be here quite yet. When it arrives and works as it should I'll certainly bump up my rating another star. The sharpener is very easy to use and a bargain at it's price. I expect to be very happy with it once I get this all sorted out.Update: Received the part promptly through the mail. The piece fit right on and the screw in question was obviously working as it should. Now this thing is smooth like butter. I sharpened a couple chains with it and the one I used so far was cutting like a brand new chain. This sharpener is easy to use and does a great job! The box came with a return shipping label to send the defective part back, which I've done. Thank you for the fantastic customer service!

I was skeptical, but it actually works quite well. I use it on my Stihl MS250 18 inch chain. Once you use it a few times it is quite fast to use. I was having the local hardware store sharpen my chains for $7.50. But with a chainsaw you have to sharpen the chain for every tank of gas, so it is better to be able to sharpen the chain yourself. I tried sharpening chains just using a round file. That works OK, but I found that it was hard to be consistent and keep the correct filing angles. With the Granberg I can maintain better control of those angles and get consistent results each time. Also it allows you to file the rakers accurately--that is essential for good cutting. The Granberg is not very expensive and made very well. It does the job. There are several UTube videos showing how to use it.

I used this product exclusively to sharpen a ripping chain. My hands are accustomed to the angle of normal crosscut chain and I was having a difficult time sharpening my ripping chain effectively by hand. This product easily accommodates that angle, or any other. It is simple and clever. Once you get a feel for it, you can really move right along. It bevels both directions, meaning you can do both left and right teeth without taking it off the bar. In use, it does a nice job, holding the file at a very consistent angle and allowing great fine adjustment. The file loosens in the thumbscrews constantly, I found myself readjusting that like every 20th stroke, which was annoying, but otherwise I found it easy to use. I was very pleased with how it sharpened the chain.So far so good. But on probably about the 15th time I used it, it failed. The tool is constructed out of die-cast aluminum, with tiny little cast ears where the top section mates to the hinge pins that allow depth adjustment. When you are filing, you put a lot of side-loaded pressure on this hinge, and this is where mine failed. This is definitely a design flaw. If you look through these reviews, this is a common point of failure.I contacted Granberg support seeking warranty info and replacement parts availability, and they replied promptly and are sending me replacement parts. So while I remain disappointed by this design/construction issue, the support is extremely impressive.Overall, this is a clever idea, albeit to fulfill a niche need. For crosscut chain angles, the Stihl product works much better for me, takes up a fraction of the space, and has proven indestructible. But for odd angles and/or high-precision needs, this is hard to beat, at the cost of being a rather delicate tool. Maybe mine failing was a fluke– I'll find out, as Granberg stands behind their product. I will update this review if I manage to break it again.

This is an awesome sharpener. Easy to setup and gets a consistent angle. Very quick way to get a nice sharp chain. Has become my go to.