Buying from eBay

As an expert at screwing things up, the advice to do some cheap practice runs, is good advice. A piece of aluminum, some WD40 and maybe some trials at grinding. Very educational. Because of the steep angle on ACME the relief needs to be a lot more than on a V thread.
 
Some time back, I had to make a half dozen or so nuts known as "followers" for a ceramics machine. A friend was supplying the commercial ceramics industry and the "batter" was chewing up followers fairly fast. Cutting small, 5/8", internal threads is good practice at threading. But, for a finished product in a hurry, especially at the shown prices on eBay, a "single pass tap" would be hard to pass up. The US made one I purchased for the ceramics followers was big $$$. The Chinese prices look a lot better. I have some 1/2" USS taps that cost that much. Following up on the link showed 5/8-10 as well. I don't need one but may order one just to have on hand. Actually two, left and right thread.

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I‘m going to give internal treading a try ! I used the back end of a cheap Banggood boring bar . It needed to be turned down and maybe more when I get ever figured out . I drilled and taped the end then drilled and reamed for .250 a dull center drill will be the profile. I roughed it for now because I had to order a Acme thread gauge . I think I’m going to need a magnifying glass , it’s small ! Here’s the old cross slide screw next to it .
 

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Well sitting here my wife asks why I’m typing on these forums , so I showed her my threads , this was the top so I said I asked about buying from eBay and usin* PayPal , she says “ I have PayPay and Venmo “. !!!
 
Alcap said:
Well sitting here my wife asks why I’m typing on these forums , so I showed her my threads , this was the top so I said I asked about buying from eBay and usin* PayPal , she says “ I have PayPay and Venmo “. !!!
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And you didn't know? :face slap: :grin:
 
And I’ll confess here : I NEVER bid on EBay only “ Buy it now”
 
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