|Forum topic by David Craig||posted 11-26-2009 04:20 PM||1455 views||0 times favorited||1 reply|
11-26-2009 04:20 PM
I had an email exchange with another member, Thomas Keefe, regarding the Jet combination jointer/planer we both own. The exchange contained some info that I thought I would share with you. Tom had written a review of this planer (http://lumberjocks.com/reviews/946) and had commented on the thinness of the blades. I had issues with this also, as they are only about 1/16th inch thick. When I received the planer, I had a nicked blade (Jet did eventually send me a free set of new ones so not a critique of the Jet customer service department) and I was impatient to try it out so I ordered a set of Freud blades that were thicker. I liked the new blades but kept getting some creep on the blades and that created some havoc for me.
Well Tom inquired as to which blades I used and my success with them and I gave him the lowdown. But Tom caught something I did not, thought it seems quite obvious to me now. The Jet blades have two slots on the blades that correspond with two pins on the blade support bar on the planer. Now when I first looked at them, I seen where they aligned, but didn’t see where it made any difference because the pins were so short they didn’t seem to hold the blade in. The truth is, that the pins go through the blade a little when the bar is completely tightened and the reason why my Freud blades were slipping was because these slots were not on the blade and only the pins were touching the Freud’s and there was probably a micrometer of a gap between some of the jack screws and the blade.
Now the gaps in the blade are much larger than the pins and I have a hard time believing the purpose of either is to hold the blade in. I think it is a proprietary thing. But one thing is for certain, if the gaps are not there, then the blades will definitely not be held tight. I felt a little stupid when exchanging with Tom, but it did remind me of one of the purposes of this site, which is to help and learn from one another. So my thanks go out to Tom for putting a little more light in this very dark mind of mine (somebody’s home, but not all the lights are on) and it looks like I get to eat a little humble pie with my Thanksgiving Turkey :)
Happy Holiday to all who celebrate it today,
-- There is little that is simple when it comes to making a simple box.