Brad93
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- Essex, United Kingdom
It’s not drilling and tapping m6. Its drilling 3.2mm and tapping M4 in M6A few hours is a bit of a exxageration, everyone with a lathe has a chuck! it's wear or accuracy really is immaterial, i wouldn't be welding to my faceplate though!
You could drill and tap and M6 in almost the same amount of time as it would take to swap a scroll chuck to a collet chuck.
It's really no different to not having expanding mandrels and having to make up a mandrel when you want to hold something by its bore.
I'd still use the collet chuck though.