Stocking up on blades for Spring and found a good price on Oregon blades for the Scags. What's the difference between the Oregon 91-638 blades and the Oregon 91-626 blades?
Difference between Oregon blades.
Skol
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The Oregon version has slightly more lift due to a slightly steeper sail. They are great blades. I run them under my JD about half the time. They last well and take and edge well. Mainly the price. You can't beat Forrest Depot for prices on the Oregon version.
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^^^ I meant I run the Oregon Scag blades under my JD, not just Oregon blades made for a JD.
Looking at the two on their website, they have the same Width of 2.5", the same center hole of 5/8, and the same thickness of .203 ........
The 482879 is 38 cents cheaper though. I didn't see any difference other than that... but figuring that stuff out is not one of my best alleys lol
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What's the difference between the two part numbers? I couldn't find much on that. Both are Oregon brand blades.
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The ones that are like .50 higher have the grit on the cutting edge to help keep an edge longer. Not worth it
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The length of the sail is much longer (not taller) on the 91-638
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The 491-626 has the fusion treatment, the 91-626 the op is asking about doesn't. The difference in the sail length. Smaller engines can turn the shorter sail easier.
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I have used both of the part number blades that you mentioned and like Ridin said, the 91-638 blades have a longer ( not taller) sail, which makes it produce more lift and discharge the clippings farther. In my opinion, the 91-626 blade is more of a medium lift blade.
I use the 91-626 blades in the spring into early summer and then switch to the 91-638 blades for the summer.
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You are correct sir I missed that thank you
Can you supply a direct link at Oregon site for the 491-626, I cannot find that blade.
I found the 91-626 which I used a lot of when I had my previous 60" Hustler. I now use the Oregon 91-627, same blade except it's 24.5" for my 72" deck.
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I have an Oregon blade chart here that I use. I can't get you a link.
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I don't believe Oregon uses Marbain as it is a patented process owned by Fisher Barton (who makes JD's blades). http://www.fisherbartonsp.com/marbain
Oregon uses very good steel that is hardened well though. Both the G5 and G6 have the fusion treatment which is just carbide particles embedded into the bottom side of the blade for the last 2"-2.5" of the cutting edge where most all the work takes place.
Oregon uses very good steel that is hardened well though. Both the G5 and G6 have the fusion treatment which is just carbide particles embedded into the bottom side of the blade for the last 2"-2.5" of the cutting edge where most all the work takes place.
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Also, remember that the G6 blades are heavier. They will steal some power. It's pretty noticeable on the lower hp mowers. But they are very strong. I ran over about an 18"-2' piece of rebar, and it stopped my blades in their tracks, and started smoking my belt. It bent the rebar, and only took a very small nibble out of the blade,...so small, that you'd actually had to look for it to find it.
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You are right that they are thicker than some OEM blades, but they are the same as many others now days. My JD blades actually weigh more than the G6's do, so the G6's spin slightly easier for my mower, especially with the teeth that let air pass through and a shorter sail height. I believe both Scag and Hustler and maybe Gravely use .250" blades under many of their mowers as well now. Regardless, Oregon makes some fine blades and I run a lot of them and not just G blades.
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I'm gonna experiment with some of their other blades. I don't feel like their G blades make as clean a cut as the stock blades on my mowers. They make my passes look like three individual blades are cutting, instead of three blades looking like one big one if you know what I mean. It's like that with all three of my mowers, too.
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I think that has something to do with a combination of the baffling under a deck and the fact that the airflow is somewhat "ripped" by the teeth, which is what they are supposed to do to clippings and leaves, but doesn't help with the finish always as you mentioned.
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That's pretty much the conclusion that I've come to. It would be nice if they could make clean cuts like regular blades,...I guess that's just wishful thinking. I may just be daydreaming too much, lol.
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