|
|
Mar 24, 2010 17:39:17 GMT
|
ive got a couple of broken studs to tackle..hoping i can weld something on em and get em out
if i need to drill them , I'm not too hopefull on getting the drill dead center
any suggestions /tips on getting the drill bang on the center?
|
|
91 golf g60, 89 golf 16v , 88 polo breadvan
|
|
|
|
|
Mar 24, 2010 17:41:34 GMT
|
center punch and a hammer
|
|
|
|
rtlkyuubi
Posted a lot
Low and Slow
Posts: 2,922
|
|
Mar 24, 2010 17:41:50 GMT
|
use a centre punch to indent the stud for the tip of the drill bit to sit in.
|
|
|
|
|
|
Mar 24, 2010 17:44:11 GMT
|
just eyeball the punch though? one of em is a m6 so not much room for error
|
|
91 golf g60, 89 golf 16v , 88 polo breadvan
|
|
berny
Part of things
Posts: 295
|
|
Mar 24, 2010 19:14:05 GMT
|
my stepdad always used a reverse thread drill for snapped bolts, i thought he was winding me up the first time he suggested them to me ;D i think screwfix or machine mart do them?
|
|
|
|
|
|
Mar 24, 2010 19:23:35 GMT
|
yeah got some of them ..i still want to make the pilot hole central as possible
|
|
91 golf g60, 89 golf 16v , 88 polo breadvan
|
|
|
|
Mar 24, 2010 20:13:39 GMT
|
You can measure and mark where to put the centre punch if you're that worried about it, but as long as you can hold the drill straight, you'll be fine. Use a pillar drill if you can. What are the studs stuck in?
|
|
|
|
|
|
Mar 24, 2010 20:18:33 GMT
|
its an exhaust manifold ...plus I'm expecting a head stud or two to snap when i remove the manifold
|
|
91 golf g60, 89 golf 16v , 88 polo breadvan
|
|
|
|
Mar 24, 2010 20:21:13 GMT
|
grind the head flat and centre punch, about the best things you can do
|
|
|
|
v8ian
Posted a lot
Posts: 3,768
|
|
Mar 24, 2010 20:25:27 GMT
|
Put the manifold back on, find a drill that is the bolt clearnce size in the manifold and spot drill the top of the stud thru the manifold using it as a driling giude, once spotted, remove the manifold and drill the stud a size less than the tapping size
|
|
Atmo V8 Power . No slicks , No gas + No bits missing . Doing it in style. Austin A35van, very different------- but still doing it in style, going to be a funmoble
|
|
|
|
Mar 24, 2010 21:22:23 GMT
|
centrepunch and start with a tiny drillbit [2mm] only a bit
|
|
yes ,it started badly ,petered off in the middle and the least said about the end the better!!!
|
|
|
|
Mar 24, 2010 22:17:04 GMT
|
Whatever you do, don't overheat the job, I did that once, overrevved the drill and it turned red hot and cooled down again, melted the end of the drillbit and kind of hardened the stud, (at least thats what I think happened) after that it took me all weekend to drill out using the best drill bits I could find. (use low speeds and oil or water to keep it cool)
It was a turbine housing/downpipe stud so it was pretty hard to start with.
|
|
Last Edit: Mar 24, 2010 22:28:35 GMT by suterman
1985 Bedford CF2 camper 1991 Volvo 240 Turbo
|
|