seized screw heads - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 11-24-2006
Senior Member
 
Join Date: Aug 2006
Location: Nantucket
Posts: 247
Thanks: 1
Thanked 4 Times in 4 Posts
Rep Power: 8
ambianceack is on a distinguished road
seized screw heads

anyone have a neat idea on how to unseize flat head screws. Found water entering from up top and traced it to the jib track want to remove and recaulk but the screws aren't moving.
thanks
Reply With Quote Share with Facebook
  #2  
Old 11-24-2006
Senior Member
 
Join Date: Dec 2005
Posts: 288
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
FrankLanger is on a distinguished road
I would start by soaking them in WD40 or Liquid Wrench overnight, then try to get some leverage--e.g the right size screwdriver gripped in a large vise grip--push down on the screwdriver while turning the screwdriver with the vise grip. If that still doesnt work, I would add a 2 - 3 foot pipe sleave over the pipe wrench to get more leverage. After that, I would try applying some heat, though carefully to not damage the surrounding gelcoat.
Others may have some better ideas.
Good luck!
Frank.
Reply With Quote Share with Facebook
  #3  
Old 11-24-2006
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 14,609
Thanks: 67
Thanked 179 Times in 175 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
Get yourself an "impact driver" tool. It's a heavy duty screwdriver that you place on the screw (using appropriate bit, of course) and hammer the top. Striking the top drives the bit into the screw, and puts a twisting motion onto it at the same time. Check the link: http://en.wikipedia.org/wiki/Impact_wrench

Since this involves some pounding, you may want to brace the deck area from below if you're not already near a bulkhead or stringer. You want the energy to go into twisting the screw, not bouncing the deck.

Also make sure you have immobilized the nut below deck or you will simply turn the whole assembly and nothing will loosen up.

Would not recommend heat, certainly not a torch, in that area. Using extra leverage on a square shaft screwdriver may work, but often you simply twist the blade out and ruin the screw/bolt head, making things worse.

Last edited by Faster; 11-24-2006 at 02:22 PM.
Reply With Quote Share with Facebook
  #4  
Old 11-24-2006
Senior Member
 
Join Date: Nov 2006
Posts: 242
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
tigerregis has a little shameless behaviour in the past
Are you sure they are not machine screws? They have a nut on them.
Reply With Quote Share with Facebook
  #5  
Old 11-24-2006
Senior Member
 
Join Date: Nov 2006
Posts: 135
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
jones2r is on a distinguished road
Now I'll be helpful.

CRC has a new penetrant out that chills the metal as well. Works like heat, but won't damage the finish, at least I wouldn't anticipate damage. I've only heard about the stuff (it's new), but it sounds like the right way to go. CRC makes great products.
Reply With Quote Share with Facebook
  #6  
Old 11-24-2006
Quetzalcoatl's Avatar
Member
 
Join Date: Aug 2006
Location: Dallas, TX
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Quetzalcoatl is on a distinguished road
removing seized screws

I agree with Faster on the impact driver tool. I've had one for years. But it's important to know that the force exerted by these things is considerable if you give them a good lick. It's possible to strip/gall the heads of screws or break the shafts. Knowing what the threads are engaged in would make sense, if it's possible to see the ends from the bottom. Are they threaded to nuts or a backing plate? That would be the place to squirt penetrating oil if accessible. If all else fails and the head slots are stripped, they might have to be drilled out, a nasty and possibly destructive task.
Q
Reply With Quote Share with Facebook
  #7  
Old 11-24-2006
ebs001's Avatar
Senior Member
 
Join Date: May 2006
Location: Ottawa, Canada
Posts: 2,119
Thanks: 5
Thanked 21 Times in 19 Posts
Rep Power: 9
ebs001 is on a distinguished road
If you do stip the heads you can buy drill bits made specifically for removing screws. The threads are reversed so you actually drill into the screw with the drill in reverse. The further you drill in the more torque it imparts to the scew and will remove the scew once the torque exceeds the force holding the screw. They come in different sizes and are available at most hardware stores. I would still use something like liquid wrench as well.
Reply With Quote Share with Facebook
  #8  
Old 11-24-2006
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
BTW, patience is a good thing. The penetrating solvents will take a couple of days to penetrate in really stubborn cases... rushing it is a pretty good way to screw things up and make it worse.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #9  
Old 11-24-2006
Quetzalcoatl's Avatar
Member
 
Join Date: Aug 2006
Location: Dallas, TX
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Quetzalcoatl is on a distinguished road
screw extractors

Here is an image of a screw extractor, which has reverse threads, and can be inserted in a drill hole in a broken screw.
Attached Images
File Type: jpg 1918283.jpg (6.3 KB, 60 views)
Reply With Quote Share with Facebook
  #10  
Old 11-25-2006
KeelHaulin's Avatar
STARBOARD!!
 
Join Date: Mar 2006
Posts: 1,662
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 10
KeelHaulin will become famous soon enough KeelHaulin will become famous soon enough
What has probably happened is that the aluminum track has corroded and fused head/shank of the screw to the track. I had this happen with some aluminum deck cleats and they simply would not turn. Remove the fasteners from below decks and try pounding upward on them with a mallot from underneath. This might help break the corrosion free from the bolts. Try penetrating oil first and give it a few days headstart. Drilling out the heads probably wont get you further than a damaged track and bolts that need to be fully drilled out. Drilling out stainless with surrounding aluminum is next to impossible (the drill will prefer to wander into the softer aluminum).
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Atomic 4 is 4 lovers agent4change Gear & Maintenance 11 08-07-2011 05:14 PM
Canadian destroyer rescues 3 sailors in storm; heads for another ... - Canada.com NewsReader News Feeds 0 11-09-2006 08:15 PM
Techniques for Removing Teak Decks Sue & Larry Buying a Boat Articles 0 11-24-2003 07:00 PM
BVI Boats Seized by US Customs VIEXILE General Discussion (sailing related) 2 07-16-2003 04:05 AM
Stripped screw hole sklamar Gear & Maintenance 3 05-30-2002 06:10 PM


All times are GMT -4. The time now is 09:08 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.