If you need to sharpen a chainsaw chain in the field, the Dremel 1453 Chain Saw Sharpener Attachment with its battery-operated rotary tools is the most convenient option. Most reviewers say this kit of three sharpening stones, gauge, spacers and wrench works very well and quickly, taking just 5 to 8 minutes per chain. However, it does require more finesse than a bench-mount sharpener.
Free-handing it. Owners almost universally praise how well the Dremel 1453 Chain Saw Sharpener Attachment works. "[It] gives you a phenomenally sharp edge that will last a long time," posts one Amazon.com user who's thrilled that it doesn't take a lot of metal off the chain with each pass, although this depends on how light a touch you use. Once you have your rotary tool set up, it takes just minutes to sharpen a chain, reviewers say.
No news is usually good news. Consumers don't have much to say about the Dremel 1453's safety, and that's generally a good thing. One Walmart.com owner says he thinks it's safer to use than a file, and several like that you can sharpen the chain while it's still on the saw. Not having to take the chain on and off equals less time spent fiddling with the tensioner.
The sharpener attachment comes with three grinding stones of 5/32, 3/16 and 7/32 inches, and can be used with Dremel tool models 4200, 4000, 400, 3000, 300, 398, 395, 285, 275, 200, 100, 8220, 8200, 8100, 800 and 770.
Instructions are a dud. The Dremel 1453 Chain Saw Sharpener Attachment is easy enough to use: It's just a grinding stone with a guide to set the angle and depth of the grind. The instructions, however, remain a sore point. Users say they're at best difficult to decipher, and a few dislike having to free-hand the tool: "It's not easy to hold the grinder at a consistent angle from tooth to tooth, but the guide helps," posts an owner at Lowes.com. Still, the Dremel is tops if you need to sharpen a chain away from the workshop, reviewers say.
About 100 users give the Dremel 1453 attachment 4.3 stars out of 5 at Amazon.com. Most are thrilled with its value, saying it's faster and easier than filing or sending the chain out for sharpening.
Review: Dremel 1453 Chain Saw Sharpening Attachment, Contributors to Amazon.com, As of July 2013
Although this particular version of the Dremel sharpening kit is no longer available here, comments from about 15 users provide insight into how Dremel sharpeners in general perform. Overall, the sharpening kit gets 4.5 stars out of 5.
Review: Dremel Sharpening Kit, Contributors to Walmart.com, As of July 2013
The Dremel sharpening kit sold here also contains the chainsaw sharpener; it gets an average rating of 4.3 stars out of 5 from a handful of reviewers. One says the instructions are hard to understand, a complaint echoed at other retail sites, but otherwise the sharpener is easy enough to use.
Review: Dremel Sharpening Kit, Contributors to HomeDepot.com, As of July 2013
Just a couple of users comment on the Dremel chainsaw sharpener at Lowes.com, but one post is quite informative. The sharpener gets 4.5 stars out of 5.
Review: Dremel Rotary Chain Saw Sharpener, Contributors to Lowes.com, As of July 2013