Blades Bradley Lawn Mower Blade Sharpener

[Ron123]

You don't say what model you have but typically you raise or lower the motor assembly to adjust the angle.

I have raised the wheel as high as it will go to get the flattest angle and it is much greater than 30 degrees. It is not possible to get a 30 degree angle without doing some major modifications to the grinder. If I am doing something wrong please tell me the right way to do it.

 

[BlazNT]

I sharpen mine everyday after mowing with a flapper disk on the angle grinder. 20 min total off and back on.

 

[Rivets]

It's not as bad as it would seem if you have a good grinder, balancer, and system. In our shop it's my job to sharpen any loose blades brought in and I use both a blade grinder or a larger 4" stone hand grinder. Somedays I could have 25-30 if the landscapers have rain and try to get caught up. Have about 6 companies with one company that brings in 15 blades about every two weeks, plus homeowners. That's not including any of the equipment I might be working on. Usually takes 5-7 minutes per blade, clean, sharpen, balance. Everyone gets as close to a 30 degree angle as I can get, no one seems to be complaining, except me when I run out of time, due to poor planning that day. Today was a light day, just 6, but Monday I had 21, keeps me young.

 

[motoman]

As above wheel size does have an effect on angle, but so does the base the blade is ground from. I do not know what a Bradley looks like , but maybe you could shim under the front or rear of the blade to help you get the angle you want. Once achieved keep the shim as a jig piece. One advantage of hand/grinder sharpening is that you set the angle via judgement. Due respect I'm not sure hitting 30 degrees perfectly is that important. And if it is a thick blade consider "backing off" or grinding a secondary bevel behind the cutting bevel . Thinning a blade like this is beneficial. Before I grind I lock the blade in a vise and use a dull wood chisel to scrape off the dried spinach, followed by rotary wire brush. The 3-5 minute/blade estimate above sounds about right IMO.

 

[reynoldston]

I sharpen mine everyday after mowing with a flapper disk on the angle grinder. 20 min total off and back on.
View attachment 28445

Mine get sharped once a year if they need it or not :ashamed: Sharping them every day you can't get much life out of a set of blades. When I worked for a dealer and they had me sharping blades they wanted me to run the grinder over the sharped edge fast just to dull them, because they said the blades last longer.

 

[BlazNT]

I run 3 sets of blades. 2 sharp all the time and one on the mower. Makes for fast blade changes. I keep the "best" 3 for trash blades the next year.