After going through thousands of chainsaw sharpener reviews, we found that most users emphasize these three points when selecting the product.

• Compatibility: Most of the chainsaw sharpeners are compatible with many brands of chainsaws, but it is always better to check whether it meets your requirements before buying. Search for user ratings and feedback from customers from verified websites to get the best deal.

• How often will you need it: Apart from the cost, you should also consider how frequently you will use the sharpener, before actually purchasing one. If you use a chainsaw only infrequently, look for proper guidelines before using the chainsaw sharpener.

• Power rating: Check the watts that the device uses—watts being a unit of power, the more watts indicate greater power in the device.

• Think about the specifications: The filing gauge in the chainsaw sharpener can restore the sharpness of the cutter. It is good to find the shortest cutter, and then buy files which match the length of the cutter. The depth gauges, or “rakers”, on the other hand, control and limit the depth to which the cutter will reach. Before buying a chainsaw sharpener, also look at the RPM (revolutions per minute) or speed of the sharpener: the higher the speed, the more reliable it will be.

• Choose an electrically operated sharpener: An electric chainsaw sharpener can work fast and ensure a smooth chainsaw in no time. Check the angle of your chainsaw blade and see if it matches your sharpener, so that the cutting process is consistent and smooth.

• Look for safety features: If you have never tried your hand on chainsaw sharpening, it is best to look for a product with safety features. Before sharpening the chainsaw, inspect the product and try to find out if there is any damage. If the teeth of the sharpener are damaged after use, they should be replaced immediately.

Timberline: Timberline is a brand known for its quality products at the best prices. Timberline makes the Timberline Chainsaw Manual Sharpener, which can effectively be used on all types of chainsaws. Made with strong machined aluminum, this machine is extremely portable and can be easily carried to any job site.

Buffalo Tools: The ECSS Electric Chainsaw of Buffalo Tools is probably the best functional and economical sharpener available in the market. Although the chain needs to be installed manually through the sharpener, it can really work wonders on your chainsaw.

Source: http://www.popularmechanics.com/home/tools/a21996/how-to-sharpen-chainsaw-tips/

https://wiki.ezvid.com/best-chainsaw-sharpeners

http://chainsawchainsharpenerreviews.com/info/the-different-types-of-chainsaw-chain-sharpener/

http://www.ebay.com/gds/About-Chain-Sharpeners-for-a-Chainsaw-/10000000178358043/g.html

http://www.bestchainsawexpert.com/best-chainsaw-sharpener/

https://www.amazon.com/Timberline-Chainsaw-Sharpener-Carbide-Cutter/dp/B004IW30LC/ref=sr_1_1?ie=UTF8&qid=1487326693&sr=8-1&keywords=best+chainsaw+sharpeners