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Last Edit: Apr 30, 2020 10:38:18 GMT by sLowered: Solved
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Looks like an oddly designed spark plug socket
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DaveF
Part of things
Posts: 29 
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It's a Stud Extractor, it tightens & grips the stud as you turn it.
They come in different sizes for different Studs (usually in a set), this one appears to be for M10. |
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Last Edit: Apr 30, 2020 1:31:52 GMT by DaveF
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Apr 30, 2020 11:09:01 GMT
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Thanks had only ever seen the universal type before. Have a picture of a Lancer (is your blue one finished?)  |
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DaveF
Part of things
Posts: 29
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Apr 30, 2020 17:35:26 GMT
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Last Edit: Apr 30, 2020 18:05:11 GMT by DaveF
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Apr 30, 2020 18:41:08 GMT
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They are indeed stud extractors. Some of the more expensive brands years ago used to offer conversion kits for them too. My 6mm one can have its gizzards removed,and I have a set of M7 rollers that go into the same body. Cannot remember why I needed M7, but it was engine related. Probably French. They come up with all the stupid not so common metric sizes...
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Do they trash the threads as you wind them out?
I have access to one that's a sort of knurled wheel that clamps on as you spin it round.
Can do a bit of a number on the threads, though.
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They are a lot friendlier to the studs than a knurled wheel type. It all depends on the stud and how tight it is. If it’s got a shoulder on it without thread,the damage usually is minimal. You can more often than not reuse the stud . I use them to pull the exhaust studs out the Mazda Rotary housings before I machine them. 90% of the time the studs get reused...
The main advantage over the knurled wheel type is you can get them into places where the knurled wheel will not go as they operate in minimal space. Basically if a socket will fit in,so will this type of ectractor. Good for exhaust flange studs where clearance can be an issue
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Last Edit: May 1, 2020 4:18:02 GMT by Deleted
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