I have always used a flap disc for sharpening blades. Anyone have anything better?
I live on a rockpile and mow 2-3 acres of hilly fields--not lawn. I didn't know about this until I looked at my Cub XT3 blades and wondered why they were blunted.I'm with rhmarw. I also use the bench grinder for better control and angle retention.
In case you are new to blade sharpening, the original angles -both A and B below- should be followed and retained.
Sharpening down to a fine edge is a mistake. That allows quick wear and rounding of the fine edge as it is too thin to resist wear.
Take off only enough material to bring the leading edge (B) down to a little under 1/32nd of an inch. I then file that front of the 1/32nd edge almost flat. This keeps the blades cutting longer.
View attachment 2507259
I bought a Ryobi belt/disc sander year before last. I added it to the top of a work bench just made for that. Sharpening blades became so much easier, 10-15 minutes for a three blade set. A quick check on the cone balancer finishes the job. I seldom use the disc. I’ve gotten a feel for matching the bevel. It just takes a little practice. I service my three mowers and three at a widow friend’s house. A lot of my wear is picking up leaves in the fall.I had used an 8" bench grinder forever...a few years ago someone on this site said they use a belt sander...I saw a Porter Cable belt sander for 10 dollars on FB or CL and grabbed it and then I got some fairly course belts on Amazon ...just to try it...I put the blade in a vise and that is all I use now...particularly good at giving you complete control ...it seems easier to see what is being ground down..I use the cone balance then also..... @Alien5044 thank you for that instructional diagram
We have mostly sand as well and it definitely wears the blades quickly. When it wears through the turned up edge at the back of the blade. It’s time for new ones.The Sandy soil where I live simply acts like a sand blaster, rapidly dulling the blades after mowing 3 acres twice. After mowing 5-6 times the elevators are gone.
Sent from my iPhone using Tapatalk
I also have a cone shaped balancer to check the balance.
Not trying to to hijack but what brand cone balancer are you guys using?I use the cone balance then also