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Dealing with wood defects

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Crook Defect
crook defect
Enlarge Image
Crook: A board that
rocks from end to
end when laid on
one edge.

Crook Defect

How you straighten the edge of a crooked board depends on the severity of the defect. If the crook is mild, run the concave edge over your jointer to straighten it. Use caution to prevent the leading end from catching on the outfeed table.

Enlarge Image
To put a straight edge on
a crooked board, stick
it on a long, straight
carrier, such as a strip
of plywood (about
3/4 x 8 x 60"), using
double-faced tape.
Guide the carrier along
the tablesaw fence to rip
off one bad edge.

For boards with severe crook, options exist. You can crosscut the board into shorter pieces, then joint each. You also can rip off the crooked edge at the tablesaw using a long carrier board, as shown in Photo A, right. Or snap a straight line on the board, cut it with a handheld circular saw, then joint the edge smooth.

Continued on page 4:  Cup Defect


Comments (5)
ckwood3640978 wrote:

I agree with dhellew21. I've never considered tight knots to be a defect. Sure, there are projects where you want clear grain, but IMHO that's rare and for most projects, as long as the knot is not separating from the grain, it's not a defect.

3/29/2016 03:52:05 PM Report Abuse
Phellis wrote:

I had a few pieces of Oak that were crooked and my solution, due to limited space and tools, was to align and clamp the board with the outside crook parallel to the edge of my workbench then use a HD trim bit in my router to straighten the crook. Then I ran the routed edge through my joiner and finally used this straight edge to guide the board through my table saw to trim the inside crook off for a nice straight board.

11/6/2014 11:13:01 AM Report Abuse
dhellew21 wrote:

There is nothing wrong with knots. Knots and the grain around them add character and color to the wood. Small knots can be glued in place with super glue, larger ones with gorilla glue before processing the wood.

11/6/2014 10:34:42 AM Report Abuse

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