Could any of you lovely people with drilling expertise tell me how to tackle drilling this effing exhaust can bolt out?I’ve managed to drill a nice pilot hole in the lower left bolt so that I can put a larger drill bit in and drill it out.
However - the bolt on the upper right seems to be made of a much harder grade of steel - all I appear to be doing is polishing the f*cker!
Any ideas - apart from spending the next six months sitting here drilling it out.
What sort of drills are you using ? I always use Tin- coated drills as they last a lot longer and stay sharp, but if you really want to make it easy (and you’re feeling flush), use a carbide drill.
It may be that the one you’re having trouble with is stainless - which is a bugger because stainless work-hardens quite nastily, so you need to cool it while you’re drilling - if you don’t have coolant to hand, you can use wd40 but you’ll get through a fair bit of it.Normally with stainless you would use low speed / high pressure otherwise you will just end up polishing the end of the piece.
Thanks G. I’m using bits designed for metal - but they are nothing special - and my Black and Decker is something I inherited from a relative who bought it when Abba were still in the charts - so maybe I need a new fangled multi-speed drill for low speed drilling and some of those carbide jobbies you were referring to. Cheers!
Got a drill you can use, if you like - it’s only a cheapo one, but it has variable speed… unfortunately I only seem to have masonry drills to hand (and a nice fat spot weld drill), so you’d need to get the right size for the job.
Cheers G - that’s really kind . I think i’ll bite the bullet and buy a better multi speed drill (they seem relatively cheap) - as I’ve still got a couple of fairing bolts to drill out - thanks for the offer - much appreciated. ;)
Thanks CM - that sounds terrific! :DI might even start getting cocky and start drilling out other peoples seized bolts - just for the hell of it and to get revenge on every bolt that held me up in the past!
dont know if this bit of advice is gonna help but in future with seized bolts if they are bolts or nuts that get hot from the engine whilst started i warm up the engine thus heating the bolts or nuts than carefully without burning(yourself) crack the em open or reverse drill bits which cut anticlockwise thus whilst drilling out your slowly putting pressure to undo the stud/bolt or have a look at the link