Reply by Geordie

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Posted on DW735 13" Planer. Aftermarket Knives

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5 posts in 4164 days

#1 posted 07-10-2009 07:58 AM

O.K… Thank you all. Some interesting feedback here.
I agree that the finish with sharp OEM knives is quite remarkable. Even at the normal 96 CPI I can get a surface that is almost equal to what I can from hand planing… and my hand plane iron is literally “razor” sharp. At 179 CPI, it is polished, even 800 grit would detract from the finish. In short.. a well planed surface should not need further sanding… BUT….
These OEM knives are weak and nick very easily. This leaves a ridge that now needs to be sanded. So.. if I have to sand after planing I might as well have a blade that that is thicker and less susceptible to nicking, gives not quite so good a finish but has a much longer working life. Even given the added cost of these blades they will be cheaper in the long run.
I work mainly with southern pine and cypress which might not be as hard as oak or walnut etc. but is extremely harsh on cutting tools…especially “deadhead” cypress which has a lot of embedded silica. This stuff knocks the edge off a blade in no time flat. No problem… Regular cleaning to remove the pitch and the judicious touch of a stone or diamond hone and off they go again. Indeed, and contrary to what DW might say, even their “disposable” knives can be touched up a time a two. Unless… they are nicked. Then chuck em out because re-grinding is not an option.
Standing next to the DW735 in my shop is a DeWalt – (formerly Atlas Machine Tool Co), 6.5” jointer, circa 1962. God knows how many trees have been reduced to chips by this beast. It has the original knives made by “The American Edge Tool Co.” I am not sure how many times they have been re-ground but unless I give them a taste of a something real hard they will for sure outlive me. Each of these blades weighs as much as the entire package of DW735s. This thing could eat the new “Yella Fella” blades and all.. lol.
Thanks Boomer99. I took a look at the Dimar site. No prices quoted but will check with them.
I think that I will end up with buying carbide blades simply because I need the portability that the 735 affords. My shop is small otherwise I would be putting this extra $250.00 cost into a big fat Jet or similar.

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