Sanding a Perpendicular Joint

Video Transcript

Hi, I'm Kevin, and on behalf of Expert Village, I'm going to show you how to sand a perpendicular joint. When you're building things like doors and picture frames, for instance; you're going to have perpendicular joints where you have grain direction going this way and grain direction going this way and dying into each other. As always when you're sanding wood you want to go with the grain. But as you can see, if you sand here you'll be going across the grain that way and here you're not going to end up getting this piece. It seems inevitable that you're go over there, which is true, but what you can do so that you always have good sanding marks that are going with the grain is you're going to use a few different machines and steps to make sure this gets done right. First off, this is just a little uneven because in joinery sometimes it doesn't come out perfect. We're going to level this surface first with a little belt sander; a very small belt sander. Just a little bit of sanding should level that out really fast. Then we're going to come back with the random orbital sander, take those marks out and since the random orbital sander isn't sanding any one direction, it's going multi-directional, it's not really going to leave anything other than light machine marks. From there we'll be able to hand sand and get a nice finished surface without having cross grain scratches in either one of these pieces. We've gotten the surface here leveled. As you can see, there's a lot of scratch marks from the belt sander from the belt going against the grain. What we're going to do now is take the random orbital sander and it's going to take out all of those marks. The final step is to hand sand this guy. The method you want to use is going with the grain of course, but you want to start with the edge that dies into the other piece. You'll go back and forth and you'll go right up to the line. I'm trying not to go over but if you do go over it's okay because we're going to come back here. We don't have to stop for another piece so we'll be able to take out any little scratches that go over into this board. We'll be able to take out by going back and forth. I'm going to put on my dust mask and I'm going to show you how to do that. There we have it; nice, clean joint. No scratch marks on either side. They meet up perfectly. It's a nice joint. We're ready for finishing after that hand sanding. That's how you deal with a joint that is perpendicular to be able to sand it but not have any marks from the two different grains meeting at this one point.

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