Join Date: Apr 2012
Thanked 504 Times in 253 Posts
I normally do them myself with a 4' hand grinder. I buy the discs at tractor supply in a ten pack for $10 when they are on sale.
I have at least three or four sets of blades for each mower. That way I can swap them in a few minutes when I am in a hurry. Although it can take a bit of time to sharpen 30 blades when they are all dull. But it is worth it when you run over something and need to change them in the middle of the day.
I recommend buying a metal blade balancer. I like them better than the plastic ones and they are more accurate than a nail. I think I paid less than $10 for the one I have.
A really stout bench mounted vice is also a must. Being able to lock the blade in place and know it will not move helps.
Also, wear a good pair of leather gloves. The blades get really hot and the gloves will give you time to drop them without burning your hand when you forget friction causes heat.
When I am really slammed and do not have time to do this myself I drop off my mower at the shop I deal with while I do something that does not require a mower. For $20 they will take them off, sharpen them and put them back on. I also will do this sometimes if they are worn out. They will install the new ones for $10.