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Thread: Punch 12mm hole in 8-10mm steel
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26th Dec 2019, 06:49 PM #121Senior Member
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Chewed shafts can bring some problems. Metal can be balled up on the shaft. When the drill bit is tightened in the chuck if one of the jaws lands on this high area the drill can be set off centre. Also you don`t get full force applied to the bit and a small load can move the bit in the jaws loosening the bit resulting in the drill spinning inside the chuck.
The drill you have might stall before the drill spins in the chuck but one day you might have a more power full one and this could become a problem.
DSC06519 e.jpg
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26th Dec 2019, 08:23 PM #122Most Valued Member
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Just a thought but wouldn't it be logical even to a fairly inexperienced person that you would remove these built up areas, this being said it would appear to me that this buildup has caught you out, that being the case logical is probably not the correct word to use.
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26th Dec 2019, 10:34 PM #123Senior Member
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I will freely admit that there have been a couple of times when I have unthinkenly stuck a drill in a chuck and started drilling. It`s a bit strange that I would let one like this get through without being dressed to remove the build up. May be it was the last hole and I left it in the chuck until the next time. Who knows.
This is why I have pointed this out to the OP as he was buying some second hand drill bits with marked shafts.
Tony
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29th Dec 2019, 09:40 PM #124
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30th Dec 2019, 07:08 PM #125Most Valued Member
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1st Jan 2020, 02:43 PM #126Most Valued Member
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Not what i call a super deal i just picked up the drill bits i asked for metric and was told there all mixed and i thought i got one of each 3mm to 13mm but i got what ye grabbed out kind of bummed i took the cheap road yet again
I should have bought the $50 set linked to, what i got in this container cost $30
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1st Jan 2020, 02:48 PM #127Most Valued Member
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This is what i got its probably worth a couple hundred bucks but just not exactly what i needed 2-3 drill bits of the same size i only needed one of each
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1st Jan 2020, 02:53 PM #128Diamond Member
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You are dreaming if you think that is worth a couple hundred of bucks.
The poor man pays twice.
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1st Jan 2020, 03:08 PM #129Gear expert in training
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1st Jan 2020, 07:33 PM #130Most Valued Member
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the bad i didn't get a 12,13mm drill bit i only got to 11mm, The good i sharpened a 5mm and 11mm bit and it actually sharpened and worked great
to cut thru the 10mm angle iron with the 5mm pilot hole took 50 second, to drill thru with the 11mm bit took 40 seconds
before sharpening i got my digital angle finder and found 59 degrees and drew a line on the tool holder on the bench grinder and it worked
i may have gone the long bumpy road but i am making progress
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1st Jan 2020, 08:17 PM #131Finally we're getting somewhere. StOp BuYiNg ChEaP cR@P!
At the end of this whole saga, add up how much you end up spending on junk and see what you could have bought the first time.Frisky wife, happy life. Then I woke up. Oh well it was fun while it lasted.From an early age my father taught me to wear welding gloves . "Its not to protect your hands son, its to put out the fire when u set yourself alight".
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1st Jan 2020, 08:34 PM #132Most Valued Member
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well those drill bits the two i picked out of the container work great i drilled in total 9x 5.5mm pilot holes and 9x 11mm holes all up 90mm of steel in about 1 hour, i was a bit unorganized i started drilling 2 pilot holes than swapping the bit to drill the larger hole ended up drilling all pilot holes than the main hole so it was much quicker
9 holes it would have taking around 35mins with swapping and aligning the steel and drill bits
i sharpened both drill bits at the start they remained sharpen thru the whole process
the 5.5mm pilot drill is a "MD" whoever makes this.. the 11mm drill bit was an absolute animal it just tore thru the metal like crazy fast
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1st Jan 2020, 08:34 PM #133Most Valued Member
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A 4mm Sutton Viper is $3.98 and a 12mm is $23.60 at Bunwahs. If you’d spent that money at the beginning of this thread as suggested, you would have had change out of what you spent on evilbay and would have had the job done in December.
I guess through adversity comes triumph.. you now have an understanding of speeds and how they affect your cutting edge, and you are learning to sharpen drills by hand. You also have some decent drill bits, just not the ones you need. In this case the learnings have a price, but as long as the lessons are learned then the relatively small cost was worth it.
Now get yourself a piece of scrap timber, and make a home for your drill bits so you don’t leave them laying around.
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1st Jan 2020, 08:41 PM #134Most Valued Member
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Yeah thing is this new 11mm drill bit is quiet a bit quicker at drilling the steel than the Viper drill bit i broke, this new 11mm drill bit from ebay/c tool was actually taking off whirly bits of steel along with chips it was eating the steel like crazy i cant see what brand it is tho as its messed up from the chuck
also the drill once loaded slows right down probably 50 to 100 rpm
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1st Jan 2020, 11:30 PM #135Most Valued Member
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I wouldn't load the DP so that it went that slow, unless you want to be in a position of having to replace it!!!! If you plan on expanding your metalworking abilities, look around for a decent DP, something with at least a 75mm + column and 16speeds. You won't be sorry, plus don't get rid of the Ryobi, it'll be ideal for a >5mm pilot hole driller.
KrynTo grow old is mandatory, growing up is optional.
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