8ob
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- Nescient in the vale
I take it you mean you are using a hand held drill with a tap in? How do you propose to hold the er16 colett in the chuck, by machining a hex on a existing collett holder?
What type of tap are you using? Machine tap or hand tap, etc?
What about these-
https://www.amazon.co.uk/TuToy-M4-M...ocphy=9044951&hvtargid=pla-850617383466&psc=1
Why did you show me those tap holders
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