Classic cars forum & vehicle restoration.
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Peter_L
Joined: 10 Apr 2008 Posts: 2680 Location: New Brunswick. Canada.
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peter scott
Joined: 18 Dec 2007 Posts: 7122 Location: Edinburgh
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Posted: Sun Mar 07, 2021 11:12 pm Post subject: |
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Very sensible. Thanks for posting.
Peter _________________ http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon |
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Peter_L
Joined: 10 Apr 2008 Posts: 2680 Location: New Brunswick. Canada.
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Posted: Sun Mar 07, 2021 11:51 pm Post subject: |
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peter scott wrote: | Very sensible. Thanks for posting.
Peter |
So simple, I can't believe it took me half a century to learn this. Especially being able to get a drill bit to start on the top of a rough, sheared bolt. I wouldn't mind having to start a 1/8th and work upward. |
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alastairq
Joined: 14 Oct 2016 Posts: 1956 Location: East Yorkshire
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Posted: Mon Mar 08, 2021 11:26 am Post subject: |
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My experience of sheared bolts has been, they have sheared close enough to the top surface that there is very little of the bored thread showing. Yet, far enough down the hole to make tapping out hazardous ....[to the threads]
The only thing I might be wary of [considering my ability to make any drill wobble]....is the gradual enlargement of the bored hole in the cap bolt, as the drill turns inside? _________________ Dellow Mk2, 1951 built, reg 1952.
Fiat 126 BIS
Cannon special [1996 registered. Built in 1950's]
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Ford Pop chassis, Ashley 1172 bodyshell, in pieces. |
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Bitumen Boy
Joined: 26 Jan 2012 Posts: 1735 Location: Above the snow line in old Monmouthshire
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Posted: Mon Mar 08, 2021 3:23 pm Post subject: |
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alastairq wrote: | My experience of sheared bolts has been, they have sheared close enough to the top surface that there is very little of the bored thread showing. Yet, far enough down the hole to make tapping out hazardous ....[to the threads]
The only thing I might be wary of [considering my ability to make any drill wobble]....is the gradual enlargement of the bored hole in the cap bolt, as the drill turns inside? |
I reckon you would have to consider the bored out bolt as a simple, disposable jig. Of course if you had a lathe to make your own as required that shouldn't really be an issue. |
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Whitegoatie
Joined: 01 Feb 2016 Posts: 59 Location: Stamford, Lincolnshire
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Posted: Sat Dec 18, 2021 2:46 pm Post subject: |
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Yeah right. In my experience they break off nearly flush to the surface, usually because they are seized and nearly always in a situation where you cant get at them...
How did he manage to snap a bolt half way down the thread on a new looking bit of equipment?
I've had some success removing sheared bolts/studs by mig welding a nut to the visible shear, then undoing while still hot. Heat works wonders. |
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