t-bone Posted February 8, 2011 Report Share Posted February 8, 2011 hi, i have a quesion, i hear that running end grain thru a jointer is dangerous. What is end grain i am new any help would be great Quote Link to comment Share on other sites More sharing options...
jab73180 Posted February 8, 2011 Report Share Posted February 8, 2011 the reason jointing or planing end grain is dangerous is because it will blow out. like Marc demonstrated in one of his finishing videos, wood grain is like a bunch of straws. when you plane or joint it, the wood fibers will pull off and become small projectiles. if you were looking at the end grain of a board, you would be looking at the end of it, where the growth rings are. long grain goes the length of the board. so long grain goes the length, and end grain is on the ends. also end grain sucks up glue and finish, again the straw reference. i dont remember which video it is, maybe someone else can chime in and remind me. Quote Link to comment Share on other sites More sharing options...
CJC5151 Posted February 8, 2011 Report Share Posted February 8, 2011 Think of it like a 2x4. If you look at the long side of a 2x4 that is the long grain. Its the direction of the fibers of the wood. The endgrain is the end of the 2x4. basically think of that 2x4 like a bundle of straws, the straws represnt the wood fibers. If you run the long grain through a planner, the planner takes shavings off the wood with the grain. If you run end grain through the planner you would be trying to slice through the fibers instead of with them. This can be done, but most safely with really really really sharp tools. hand planes would be the best Quote Link to comment Share on other sites More sharing options...
jab73180 Posted February 8, 2011 Report Share Posted February 8, 2011 is there an echo in here, lol Quote Link to comment Share on other sites More sharing options...
CJC5151 Posted February 8, 2011 Report Share Posted February 8, 2011 is there an echo in here, lol hahaha When i started there wasnt a response yet Quote Link to comment Share on other sites More sharing options...
jab73180 Posted February 8, 2011 Report Share Posted February 8, 2011 try this>>> http://thewoodwhisperer.com/oil-based-finish-basics/, right around the 18 minute mark he talks about the straw analogy. i recommend watching all his videos, you will learn tons. Quote Link to comment Share on other sites More sharing options...
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