Will wood screws lose strength after being screwed, and unscrewed? - Woodworking Talk - Woodworkers Forum
 
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post #1 of 9 Old 02-03-2013, 02:57 PM Thread Starter
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Will wood screws lose strength after being screwed, and unscrewed?

If I were to screw and unscrew a wood screw more than once, would it lose strength over time?

I'm asking because I have a walnut slab dining table that I plan to assemble, and disassemble on a weekly basis. The steel legs are each attached with (4) multi-purpose 2" wood screws. Thanks! - Danny
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post #2 of 9 Old 02-03-2013, 03:01 PM
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Yes they would. Why are you taking it apart so much?

When it's rustic......it's rustic
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post #3 of 9 Old 02-03-2013, 03:11 PM
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No the screw will not loose strength due to screwing and unscrewing however, I believe you are really asking about the joint and it will get looser over time due to the screw always going in and out. If you are looking at disassembly often I would recommend that you put a Rod into one piece and use a washer and bolt or wing nut on the other side. When you consistently install and remove threaded items into wood the opening tends to open up and become sloppy.
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post #4 of 9 Old 02-03-2013, 03:26 PM
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When I was a kid we used to squirt some yellow glue in every screw hole at assembly. You could do that too. If it's possible, I would convert the screw holes to threaded inserts and and change out the screws.

Al

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post #5 of 9 Old 02-03-2013, 04:29 PM
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Quote:
Originally Posted by bittiker View Post
If I were to screw and unscrew a wood screw more than once, would it lose strength over time?

I'm asking because I have a walnut slab dining table that I plan to assemble, and disassemble on a weekly basis. The steel legs are each attached with (4) multi-purpose 2" wood screws. Thanks! - Danny
Like everyone has said, yes, the joint will get looser and looser. I figure wood screw joints are only good for a half dozen or so assembly/disassembly operations.
If you are planning on this being a weekly operation, I would make it as toolless as possible. Hanger bolts with wing nuts or even knobs maybe?

John

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post #6 of 9 Old 02-03-2013, 04:34 PM
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wood screws will loose some strength eventually, they will get work hardened, and eventually break. I'd agree.....hanger bolts and nuts would be a better choice.
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post #7 of 9 Old 02-03-2013, 05:28 PM
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One other thing that can happen is that the slots, +s, or square recesses will become worn and hard to turn with your screwdriver.
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post #8 of 9 Old 02-03-2013, 05:31 PM
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Quote:
Originally Posted by Al B Thayer
When I was a kid we used to squirt some yellow glue in every screw hole at assembly. You could do that too. If it's possible, I would convert the screw holes to threaded inserts and and change out the screws.

Al

Friends don't let friends use stamped metal tools sold at clothing stores.
+1 for the inserts.
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post #9 of 9 Old 02-04-2013, 04:28 PM
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Quote:
Originally Posted by Goat Locker View Post
No the screw will not loose strength due to screwing and unscrewing however, I believe you are really asking about the joint and it will get looser over time due to the screw always going in and out. If you are looking at disassembly often I would recommend that you put a Rod into one piece and use a washer and bolt or wing nut on the other side. When you consistently install and remove threaded items into wood the opening tends to open up and become sloppy.
This is a good answer.

George
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