Forums | Home Repair | Home Improvement | Painting | Interior Decorating | Remodeling | Landscaping


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Carpentry

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-06-2012, 08:52 PM   #1
Member
 
Join Date: Dec 2006
Location: Fountain Valley, CA 92708 (orange county)
Posts: 614
Share |
Default

Question about Wood screws breaking


When driving in wood screws by hand I've occasionally had screws break off at the head or middle when things got tight. But I've never broken a wood screw when driving it in with a electric drill. Why is this? It doesn't seem logical, since the drill applies more velocity and force you would think it would be more likely to break wood screws.
darsunt is offline   Reply With Quote
Old 01-06-2012, 09:08 PM   #2
Member
 
Ironlight's Avatar
 
Join Date: Apr 2011
Location: Washington DC
Posts: 701
Default

Question about Wood screws breaking


The drill driver applies continuous torque and keeps the screw turning against the friction of the wood. On the other hand, whenever you drive a screw by hand you need with each twist to start it turning again and overcome the initial contact friction of the screw against the wood. You probably torque it pretty hard to get it turning and that in turn fatigues the metal until it fails.

Edit:
I always try and drill pilot holes slightly smaller than the screw's minor diameter (the diameter of the shaft minus the depth of the screw threads). Not only do screws drive easier but you maintain the integrity of the wood grain by not crushing it, resulting in greater holding power. You can also more precisely place the screw.

Also, consider if you're using the right screw for the job. Drywall screws, which have become defacto "all purpose" screws to a lot of people, have fairly weak torsional strength compared to wood screws.

Last edited by Ironlight; 01-07-2012 at 11:48 AM.
Ironlight is offline   Reply With Quote
The Following User Says Thank You to Ironlight For This Useful Post:
Snav (01-06-2012)
Old 01-06-2012, 09:52 PM   #3
In a little over my head
 
Join Date: Jan 2011
Location: Atlanta, GA
Posts: 709
Default

Question about Wood screws breaking


I've noticed that, too. Try some beeswax on the screw threads.
ratherbefishing is offline   Reply With Quote
The Following User Says Thank You to ratherbefishing For This Useful Post:
Snav (01-06-2012)
Old 01-06-2012, 10:01 PM   #4
Disabled wood vet
 
titanoman's Avatar
 
Join Date: Nov 2011
Location: California
Posts: 1,646
Default

Question about Wood screws breaking


Quote:
Originally Posted by Ironlight
The drill driver applies continuous torque and keeps the screw turning against the friction of the wood. On the other hand, whenever you drive a screw by hand you need with each twist to start it turning again and overcome the initial contact friction of the screw against the wood. You probably torque it pretty hard to get it turning and that in turn fatigues the metal until it fails.
Very logical explanation. Well said.

Sent from a Samsung Galaxy S2
titanoman is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
PT Wood Question Branden Building & Construction 1 08-23-2010 02:26 PM
wood fencing question march7 General DIY Discussions 6 05-09-2008 11:13 AM
Laying Wood Floors - subflooring question drewz Flooring 8 09-21-2007 08:56 AM
Wood Burner Installation Question? fisher501 HVAC 1 12-22-2005 09:29 PM
Question About Bolting Wood Together for a Loft ArcticRSXS Building & Construction 15 09-16-2005 04:42 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.