Advice on Tapping Out an Existing Thread

[TONUP]

At work we have a large piece of kit to which an inspection hatch is attached with an M8 bolt. Anyway this bolt is now spinning around, and not tightening. Someone was a bit heavy handed

I would like to drill it out and re-tap it to accept a larger M10 bolt.

Q - What size drill should I use to open up the hole, and leave enough material to rethread it?

Thanks

Alan

 

[Terranical]

Unless you have access to tapping-size drills, a 9mm drill should do it.

 

[cncfabs]

At work we have a large piece of kit to which an inspection hatch is attached with an M8 bolt. Anyway this bolt is now spinning around, and not tightening. Someone was a bit heavy handed

I would like to drill it out and re-tap it to accept a larger M10 bolt.

Q - What size drill should I use to open up the hole, and leave enough material to rethread it?

Thanks

Alan

8.5 for M10x1.5

 

[TONUP]

Thanks for the quick replies. This may save us some money.

Regards

Alan