22-08-2020, 10:17 PM
I think you have the right idea James. 1 is the way I'd go and 2 / 3 are satisfactory repairs if it goes bad.
The knack is to get the drill square and centred, if you succeed there you'll be fine - don't just eyeball it, utilise any means at your disposal to get it right.
Like Dickie I have no positive experience with extractors - not for a stud broken below the surface anyway. Though this is greatly to your advantage as you can use the mouth of the hole to assist centreing. You don't need a lathe to make a drilling guide - just three holes in a scrap of steel plate which you can locate on a couple of adjacent studs and through which you can make a pilot hole.
Never tried one myself but I've heard of people using self-centreing bits these in circs like yours (- they are designed for drilling holes through door hinges). This is just an example:
https://www.leevalley.com/en-gb/shop/too...drill-bits
The knack is to get the drill square and centred, if you succeed there you'll be fine - don't just eyeball it, utilise any means at your disposal to get it right.
Like Dickie I have no positive experience with extractors - not for a stud broken below the surface anyway. Though this is greatly to your advantage as you can use the mouth of the hole to assist centreing. You don't need a lathe to make a drilling guide - just three holes in a scrap of steel plate which you can locate on a couple of adjacent studs and through which you can make a pilot hole.
Never tried one myself but I've heard of people using self-centreing bits these in circs like yours (- they are designed for drilling holes through door hinges). This is just an example:
https://www.leevalley.com/en-gb/shop/too...drill-bits