SeniorCitizen
Lawn Addict
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![1718118044303.jpeg 1718118044303.jpeg](https://www.lawnmowerforum.com/data/attachments/57/57778-f48bad5ce45df92da92fc0f0e57055f5.jpg)
BTW , this is a original J D blade from a 350X and it's no harder to file than mild steel . So much for heat treatment .
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I have only found one company that made proper heat treated blade and I dont have the old mower that they fit on anymore. Soulution. Make a Burn Barrel for your yard and heat treat the new blades yourself. you can measuire the temp of the steel and then quence in a 5 gallon bucket of used motor oil then sharpen them. Might want to do a dozen at a time as its another yard maintenance task thats a pain in the butt.View attachment 68904With a extra vise a quick jig to hold a blade so the hand grinder can grind on the top edge . This blade gets about 30° and three 2 xs gives that angle close enough .
BTW , this is a original J D blade from a 350X and it's no harder to file than mild steel . So much for heat treatment .
This can harden a blade but only if it has the right steel .I have only found one company that made proper heat treated blade and I dont have the old mower that they fit on anymore. Soulution. Make a Burn Barrel for your yard and heat treat the new blades yourself. you can measuire the temp of the steel and then quence in a 5 gallon bucket of used motor oil then sharpen them. Might want to do a dozen at a time as its another yard maintenance task thats a pain in the butt.