keanej
New Member
I was about to remove the engine mounts and I thought it may be a good idea to paint the brackets - a big mistake, the 1/2 inch bolt broke off on one side snapped off.
So after several attempts to get the broken bolt out ( only making things worse of course ! ) I decided to drill it out.
There aren't any decent tool shops around here any more, so bought some titanium drill bits from B&Q, after around 30 minutes of drilling they had hardly made a dent on the bolt surface.
So off I went to Machine Mart, the chap there assured me these Clarke Cobalt tipped drills are the best thing since sliced bread and would cut through anything - admittedly slightly better they drilled about a millimetre every 30 minutes, concerned about my drill burning out I gave up and searched the web (again) - everything suggested that carbide was the best
http://uk.rs-online.com had some expensive drills made out of carbide, rather than being just tipped - so I took a leap of faith and ordered a couple, they arrived the next morning - They cut through the bolt like it was going through soft butter, so well worth the money. Just goes to show you get what you pay for.
http://uk.rs-online.com/web/search/...=searchProducts&searchTerm=667-3500&x=27&y=15
I have drilled through the bottom of the bolt into the space bellow and filled it up with WD40, I'll leave it soaking overnight. The question now being having got a nice 5mm hole through the middle of the bolt do I use a stud extractor or drill it out further and retap the hole ? - I'll sleep on that one.
So after several attempts to get the broken bolt out ( only making things worse of course ! ) I decided to drill it out.
There aren't any decent tool shops around here any more, so bought some titanium drill bits from B&Q, after around 30 minutes of drilling they had hardly made a dent on the bolt surface.
So off I went to Machine Mart, the chap there assured me these Clarke Cobalt tipped drills are the best thing since sliced bread and would cut through anything - admittedly slightly better they drilled about a millimetre every 30 minutes, concerned about my drill burning out I gave up and searched the web (again) - everything suggested that carbide was the best
http://uk.rs-online.com had some expensive drills made out of carbide, rather than being just tipped - so I took a leap of faith and ordered a couple, they arrived the next morning - They cut through the bolt like it was going through soft butter, so well worth the money. Just goes to show you get what you pay for.
http://uk.rs-online.com/web/search/...=searchProducts&searchTerm=667-3500&x=27&y=15
I have drilled through the bottom of the bolt into the space bellow and filled it up with WD40, I'll leave it soaking overnight. The question now being having got a nice 5mm hole through the middle of the bolt do I use a stud extractor or drill it out further and retap the hole ? - I'll sleep on that one.