Why is 1/4” pin stock always bigger than the 1/4” drill hole

David Mary said:
Oh my gosh I hadn't even heard of that. I actually thought you were implying a cuss word 🤦‍♂️

Okay thank you I will look into all of these. Appreciate you guys!!
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There are fractional drills, Metric drills, Letter drills, and Number drills.
 
I just noticed all the responses on the previous page. Thank you everyone for the advice, and confirming I have not been alone in this frustration!
 
its nice to have a whole drill index or two around.
 
For me I prefer the 6.4 mm bit to the F as I do like a little tighter fit.

For years I had no issue with 1/4 inch bit for 1/4 tubing but then something changed.
 
Seedy Lot said:
For years I had no issue with 1/4 inch bit for 1/4 tubing but then something changed.
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Yes. Lorien already explained that one quite well on the previous page.

Qi5qcGc
 
Pinoy Knife said:
yes indeed and what you don't have at least 1 set of each ????
hell i got 2-3 of some (im over prepared)
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Haha.... I try to only have what I need..... I'm personally on the hunt for a good carbide 5/16" CT'BORE, or flat bottom drill, or something ?

I bought the ct bore from Makers Supply (which I like as a company) for stuff......

But Hate that tool, what a Waste. Dull, and just burns the holes.
Never made a good hole with it..... Part of me wants to leave a bad review on It.
 
" I'm personally on the hunt for a good carbide 5/16" CT'BORE, or flat bottom drill, or something ?"

Try USA Knife Maker. That is where I got mine.

For a flat end bit, try a carbide three-flute or four-flute end mill.
 
ok fine
since this is something that will Never stop being a issue for you guys .... Make them from a Reamer !!!!
every size is available in either HSS or Carbide.... you make a collar/drill stop and cut the tip down to whatever size you need it
then you re sharpen the tip so it cuts flat... total time 15/30 minutes.......... 15min HSS -30 min Carbide
ive been doing this for 25 years instead of counting on any supplier.... i cant believe no one else does this !!!!!
 
Pinoy Knife said:
ok fine
since this is something that will Never stop being a issue for you guys .... Make them from a Reamer !!!!
every size is available in either HSS or Carbide.... you make a collar/drill stop and cut the tip down to whatever size you need it
then you re sharpen the tip so it cuts flat... total time 15/30 minutes.......... 15min HSS -30 min Carbide
ive been doing this for 25 years instead of counting on any supplier.... i cant believe no one else does this !!!!!
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That's a good Idea,

I might try that with a cheap builders Masonry drill bit and so end up with a carbide tip, I will see if I can flatten it enough to leave just the end in place to act as two cutting teeth.
 
David Mary said:
F letter bits on the way. 😄 These will save so much time in the shop. To think I just assumed everyone had to chuck up their pin stock in the drill and run it back and forth on the belt... 😒
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until recently I thought you were doing it for "epoxy bite"?
Idk it was a size thing....
 
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