Finding the center for this job has been covered in great detail (Google broken bolt tool) with specific tools recommended.
Unless you do make that first center punch dead-center ,it will be a tedious job.
for exmple
https://www.brokenbolt.com/blog/broken-bolt-extractors-a-comparison-of-broken-bolt-removal-tools/
https://www.youtube.com/watch?v=mRGcuGK-POs
https://www.youtube.com/watch?v=c-VD1yx61bA
Last edited by Gelbster; 01-13-2018 at 06:23 PM.
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