I am looking to drill a couple of seized bolt heads clear on a large piece of University machinery. They are hi-tensile 5/8 hex machine bolts and secure a 3 tonne actuator to the underside of a large steel platform.
There is around a 25 mm diameter thread on these bolts with the cap head 33 mm diameter x 25 mm deep. I have clear access to the holes where these bolts are located, although the drill stroke is going to need to be around 200 mm and ideally around 30 mm diameter to ring the bolt head off as they are located at the bottom of a 175 mm x 36 mm hole. 2 of the 3 bolts have 5/8 hex tool hardened bits sheared off in them, one of the 5/8 hex turned a round in there, and another one sheared the bolt head off. (the other 15 cracked loose on a 5 x multiplier & bar).
This is ideally situated for mag drilling gear, with a large steel bed.
Please advise what products you supply might stand the best chance or advise if you can recommend an alternative. The ideal scenario is finding someone that deals with this stuff on a regular basis and just giving them to job. We are located close to Milton Keynes if this is viable.
Many thanks.
Antony Charnley Phone number removed. Mod 2. The good news is that 2 best people on this forum to give you an answer are able to access your details without my help
