New Posts New Posts RSS Feed: Sheared screws in mast step
  FAQ FAQ  Forum Search   Register Register  Login Login

Sheared screws in mast step

 Post Reply Post Reply Page  <123
Author
Sam.Spoons View Drop Down
Really should get out more
Really should get out more


Joined: 07 Mar 12
Location: Manchester UK
Online Status: Offline
Posts: 2472
Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jul 19 at 9:10am
The hardest thing to find will be the left handed drills (well, a lathe to drill the guide bolts, but I guess that's not relevant in this case), Amazon is you friend. Much easier with larger, and clean, un-corroded, bolts though  Embarrassed
Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"
Back to Top
JimC View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 17 May 04
Location: United Kingdom
Online Status: Offline
Posts: 6147
Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jul 19 at 9:11am
The big trouble with these techniques is that they require skill, experience and practice. So if someone like me without those three attributes has a go the first few attempts tend to end badly. So in the trade you might give a youngster a scrap cylinder head to practice with. If the OP boat is wood I'd be thinking that my fallback would be to drill all round the screw to extract, then drill a large hole and plug it. New screw could then go in the plug.
Back to Top
423zero View Drop Down
Really should get out more
Really should get out more


Joined: 08 Jan 15
Location: United Kingdom
Online Status: Offline
Posts: 1772
Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jul 19 at 12:00pm
One inch hole saw, drill down side of screw, then glue in one inch Dowell, prefix mast foot in same place.
Back to Top
Sam.Spoons View Drop Down
Really should get out more
Really should get out more


Joined: 07 Mar 12
Location: Manchester UK
Online Status: Offline
Posts: 2472
Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jul 19 at 3:51pm
Originally posted by JimC

The big trouble with these techniques is that they require skill, experience and practice. So if someone like me without those three attributes has a go the first few attempts tend to end badly. So in the trade you might give a youngster a scrap cylinder head to practice with. If the OP boat is wood I'd be thinking that my fallback would be to drill all round the screw to extract, then drill a large hole and plug it. New screw could then go in the plug.

Exactly. The guy in the (excellent BTW) video had it easy with all the tools including access to a lathe to make his drill guides, and sheared bolts with not a sign of corrosion. Not saying he was not skilled and a video of him waiting for penetrating oil penetrating would be worse than one of paint drying but.......

If other methods fail then I too would drill oversize and use a plug of new wood too.
Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"
Back to Top
Chris Robinson View Drop Down
Newbie
Newbie


Joined: 02 Oct 07
Location: United Kingdom
Online Status: Offline
Posts: 2
Post Options Post Options   Quote Chris Robinson Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 19 at 8:12am
I agree that the techniques shown in the video are above average boat bimbling level but the purpose of linking it was to show the methods for overcoming problems that others had mentioned. I would imagine that it would not be too hard to make a pre drilled plate which could be screwed into place and would then act as a jig to drill the sheared screws out.

Personally, I like the hole saw suggestion. Simple and effective. Smile
Back to Top
Sam.Spoons View Drop Down
Really should get out more
Really should get out more


Joined: 07 Mar 12
Location: Manchester UK
Online Status: Offline
Posts: 2472
Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 19 at 9:14am
That video is excellent, I didn't want to suggest otherwise.

I agree WRT the hole saw technique if all else fails, an elegant solution.  Thumbs Up
Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"
Back to Top
 Post Reply Post Reply Page  <123

Forum Jump Forum Permissions View Drop Down

Bulletin Board Software by Web Wiz Forums® version 9.665y
Copyright ©2001-2010 Web Wiz
Change your personal settings, or read our privacy policy