3mm & under are cheap because they use these by the millions in electronics manufacturing.? Over 3mm tends to get expensive quite fast.
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Circuit boards are generally about 1mm thick, so these drills are only 5-10mm long.? They¡¯re very sharp, I once drilled a hole thru a coin just by spinning one between my fingers.? Yes, I was bored.
I have not found my shop yet, it is here somewhere. Home depot is ok, however not for the most I am doing. Mostly I get my stuff from China.?
Johannes ? Lavoll. ? ? ? ? ? ? ?
? ?Mexico?
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On 5 May 2024, at 16:46, mike allen <animal@...> wrote:
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????? A bit off topic but Johanes I'm wondering if you have supply houses where you can get drills & lathe bits in your p[art of the country . I have one that @ 50 miles from me in Reno & another in Carson City @ 80 miles from me so it's not out of the question to make a drive for something if I really need it .
thanks
animal
On 5/5/24 11:57 AM, Johannes wrote:
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Thanks Tony
I learned a new word to day: spotting drill
I had one in my box, always wounder how it looks so ¡°funny¡± . It was also not good to drill a 10 mm hole with.
To morrow I will check my center drills , maybe I will find one packed in a oily paper, packed in a red box.
/johannes
Mexico
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From: Tony Smith Sent: s?ndag 5. mai 2024 10:33 To: [email protected] Subject: Re: [7x12MiniLathe] Drill a Hole
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Use a spotting drill to make a pilot hole.? They're roughly the same thing
as a centre drill except wider tip angle (centre drill is 60 degree).
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Then again a centre drill would probably work just fine given you're only
