Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 28-02-2015, 11:34   #1
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Cowes (Winter), Baltic (Summer) (the boat!); somewhere in the air (me!)
Boat: Cutter-Rigged Moody 54
Posts: 19,726
Best Practice for Repairing Worn Threads in Wood?

Sailboat doors live a hard life -- being opened and closed sometimes hundreds of times a day, and being slammed hard in a rough seaway.

I have been trying to tighten up and adjust all my doors and cabinet doors, and a lot of the hinge screws have lost their grip.

I have always, since I can't remember when, repaired this condition by working some epoxy down into the screw-hole. This is surely the right thing to do, but there are a few different ways to do it, which has left me puzzled.

1. Fill the hole completely with epoxy. Let it harden completely. Then drill a hole in it for the screw to grip in.

2. Don't fill the hole completely. Just wipe some in there with a toothpick, enough for the threads to get a grip. Then you don't need to drill the hole.

3. Fill the hole more or less, let the epoxy partially set, then put the screw in, not tightening it all the way. That way the screw presses the epoxy into the wood. Tighten the screw after the epoxy is completely cure.

4. Same as (3), but put the screw in immediately, because the partially set epoxy will no longer flow.


Any tips from you masters?
__________________

__________________
Dockhead is online now   Reply With Quote
Old 28-02-2015, 12:00   #2
Registered User
 
travellerw's Avatar

Join Date: Jan 2014
Location: Martinique
Boat: Fortuna Island Spirit 40
Posts: 1,710
Re: Best Practice for Repairing Worn Threads in Wood?

When I didn't have Epoxy available, I have filled the holes with toothpicks and then put the screw back in. It held for years in my RV.
__________________

__________________
travellerw is online now   Reply With Quote
Old 28-02-2015, 12:01   #3
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: Best Practice for Repairing Worn Threads in Wood?

Dip a couple of toothpicks in waterproof glue, press into hole, snap off even with facing, insert and tighten screw. Better yet, snap of the toothpicks before dipping in glue and inserting into screw hole.
__________________
DeepFrz is offline   Reply With Quote
Old 28-02-2015, 12:08   #4
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,334
Re: Best Practice for Repairing Worn Threads in Wood?

Tooth picks and glue. Iso fast set glue is fine also. Comes in thick... hobby store..
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 28-02-2015, 12:09   #5
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,027
Re: Best Practice for Repairing Worn Threads in Wood?

Quote:
Originally Posted by DeepFrz View Post
Dip a couple of toothpicks in waterproof glue, press into hole, snap off even with facing, insert and tighten screw. Better yet, snap of the toothpicks before dipping in glue and inserting into screw hole.

Go this route, or if it's really screwed up, drill a .25" hole and glue in a piece of dowel, after the glue sets drill a hole in the dowel for the screw.


Sent from my iPad using Cruisers Sailing Forum
__________________
a64pilot is online now   Reply With Quote
Old 28-02-2015, 12:12   #6
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Cowes (Winter), Baltic (Summer) (the boat!); somewhere in the air (me!)
Boat: Cutter-Rigged Moody 54
Posts: 19,726
Re: Best Practice for Repairing Worn Threads in Wood?

Jeez, all these years and never dreamed of that toothpick trick. Thanks, guys!!
__________________
Dockhead is online now   Reply With Quote
Old 28-02-2015, 12:40   #7
֍֎֍֎֍֎֍֎֍֎

Cruisers Forum Supporter

Join Date: Apr 2006
Posts: 13,022
Re: Best Practice for Repairing Worn Threads in Wood?

You can even dip the toothpicks in Elmer's or other casein glue, it is strong enough for the job and will allow you to unscrew without waxing the screws. If you want to be really neat, cut the toothpicks to length, instead of just jamming them in and breaking them off.(G)


Remember to use marine grade toothpicks! The best ones are made of aged Sitka spruce.(VBG)
__________________
hellosailor is offline   Reply With Quote
Old 28-02-2015, 12:42   #8
Senior Cruiser
 
colemj's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,049
Images: 12
Re: Best Practice for Repairing Worn Threads in Wood?

Yep - toothpicks here too. Probably not "proper", but I have yet to have a repeat failure - and have by now completely forgotten which holes have the toothpick fix, so I can't re-fix them "properly" anyhoo.

Mark
__________________
www.svreach.com

You do not need a parachute to skydive. You only need a parachute to skydive twice.
colemj is offline   Reply With Quote
Old 28-02-2015, 12:47   #9
cruiser

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Re: Best Practice for Repairing Worn Threads in Wood?

"Best" practice?

Well toothpicks will often work, and I have done this myself, but I think the best practice is to drill out the hole to the next largest available wooden dowel size, coat the end of the dowel and the inside of the hole with epoxy, drive the dowel into place with a light blow from a hammer, wait for it to cure, cut it off flush with the surrounding surface, then drill the proper sized pilot hole and reinsert the screw.


Now if you've decided the toothpick technique is good enough but you don't have any toothpicks handy, just get out your pocket knife and cut a sliver off the edge of a board.
__________________
rwidman is offline   Reply With Quote
Old 28-02-2015, 13:00   #10
Registered User

Join Date: Oct 2009
Posts: 134
Re: Best Practice for Repairing Worn Threads in Wood?

Perment fix you will never have to repeat in next 50 years is to put masking tape over old holes, drill out hole a little bigger (forstner bit is best for this and epoxy hardwood dowel in place flush. Let set up then redrill correct size hole for cabinet screw. This may take 5 minuites longer but you will never have to do again ever. I spent an afternoon doing this on all cabinets about 15 years ago and have never had a failure. Note make sure oversize hole will be covered by hinge fittings.
__________________
gulfstar37 is offline   Reply With Quote
Old 28-02-2015, 14:50   #11
Registered User
 
The Way's Avatar

Join Date: May 2011
Location: On the boat, currently Tampa Bay, Florida
Boat: Dickerson ketch, 36'
Posts: 176
Re: Best Practice for Repairing Worn Threads in Wood?

If you use the dowel trick, aren't you then screwing into end-grain? I thought that was bad!

Thanks,
Jack
__________________
The Way is offline   Reply With Quote
Old 28-02-2015, 15:32   #12
Registered User

Join Date: Oct 2009
Posts: 134
Re: Best Practice for Repairing Worn Threads in Wood?

The Way
If you use the appropriate dirll size for the screw you should not have a problem with this. Where people get in trouble is either too small a hole or worse yet no pilot hole at all. I'm assumming the screws for the cabinet doors will be less than 1/4 inch most likely #6, 8,10 or maybe #12.

Have a great day.
__________________
gulfstar37 is offline   Reply With Quote
Old 28-02-2015, 15:35   #13
Registered User

Join Date: Mar 2009
Location: Australia, Central Coast.
Boat: Boden 36 Triple chine long keel steel, named Nekeyah
Posts: 776
Re: Best Practice for Repairing Worn Threads in Wood?

Matchsticks are also good.
Regards,
Richard,
__________________
boden36 is offline   Reply With Quote
Old 28-02-2015, 15:51   #14
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,027
Re: Best Practice for Repairing Worn Threads in Wood?

Quote:
Originally Posted by The Way View Post
If you use the dowel trick, aren't you then screwing into end-grain? I thought that was bad!



Thanks,

Jack

Normally it is, it would spilt right away, but the dowel is constrained in the parent plywood so it can't. I'm sure it fractures along the grain, but it doesn't matter


Sent from my iPad using Cruisers Sailing Forum
__________________
a64pilot is online now   Reply With Quote
Old 01-03-2015, 08:21   #15
cruiser

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Re: Best Practice for Repairing Worn Threads in Wood?

Quote:
Originally Posted by a64pilot View Post
Normally it is, it would spilt right away, but the dowel is constrained in the parent plywood so it can't. I'm sure it fractures along the grain, but it doesn't matter


Sent from my iPad using Cruisers Sailing Forum
That's correct.

There's another, more complicated way that hasn't been mentioned - metal screw inserts.



Drill the hole out to fit one of these, screw it in and use a machine screw instead of a wood screw. This is a good way to attach something you will be removing from time to time.
__________________

__________________
rwidman is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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
Worn Alternator Mounts Desmo Engines and Propulsion Systems 1 26-05-2010 17:43
Worn Propeller Shaft - Replace or Repair jskrypek Construction, Maintenance & Refit 8 14-04-2010 06:37
Worn Out Engine Mounts JusDreaming Engines and Propulsion Systems 5 23-06-2009 17:18
WARNING: change when half worn. seafox Construction, Maintenance & Refit 36 22-03-2007 00:39



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:01.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.