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I finally meet up with a possessed board

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Forum topic by controlfreak posted 09-21-2020 05:54 PM 402 views 0 times favorited 4 replies Add to Favorites Watch
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controlfreak

1407 posts in 524 days


09-21-2020 05:54 PM

Topic tags/keywords: pine tablesaw

I was ripping down some SYP 2×10x8 for the top to my workbench build. All was going well and I was being careful to stay out of the kick back zone. I started on one ripping down the middle but at about 14” in the board compressed the riving knife to the point the board stopped moving. Rather than try brute force I stopped the saw and freed the board. I thought that’s weird and turned the board around and started over. About a foot away from the other kerf the board made a loud pop and blew apart. I hate to think what would happen when a board behaves like this when hands are in a vulnerable place. I was using push blocks too so I was never in a bad spot.


4 replies so far

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Madmark2

1835 posts in 1510 days


#1 posted 09-21-2020 08:02 PM

Case hardened. Cooked at too high of a temp when it was dried. Have had several of those over the years. Fun.

I usually have a helper with a screwdriver holding the kerf open on the outfeed side for boards like that.

You know how if you’re just squaring up the end of the board and you get this 1/16” wide all endgrain cutoff? Normally the cutoff is like an emery board, nice and straight. Had this piece of very curly maple and the cutoff corkscrewed onto the table. That lousy slab of board fought every attempt to cut it. It didn’t want to rip, crosscut or plane. Wound up as kindling IIRC.

-- The hump with the stump and the pump!

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tomsteve

1095 posts in 2141 days


#2 posted 09-21-2020 09:48 PM

if that board had the pith,that could be the reason.

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SMP

2917 posts in 828 days


#3 posted 09-21-2020 10:31 PM

Have had plenty of possessed sugar pine here in So Cal. Have ripped boards that actually popped back over around themselves once past the splitter. It was like self stacking boards.

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DennisMitchell

7 posts in 1489 days


#4 posted 09-21-2020 10:50 PM

Nothing like getting a nice straight edge on the jointer, only to cut off a two inch section and watch it do a half arch.

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