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Thread: Cheap drills
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7th July 2008, 10:02 AM #1
Cheap drills
Bought a 115 piece set of twist drills to use for taps at Supercheap Auto. Only $50. I have many drills but only in standard sizes and increments of 0.5mm. These went from 1mm to 12mm and the smaller ones increment in 0.1mm.
Yesterday drilling 3mm mild steel for a 6mm fine thread, this happened to the drill. Whilst they are titanium nitride coated the description didn't say the core was mild steel or possibly wrought iron. This has never happened to me before, broken many but never straightened one.
So one gets what one pays for. All is not lost, I'll just drill a little undersize with a normal drill before finishing up with a Supercheap plasticine oneBodgy
"Is it not enough simply to be able to appreciate the beauty of the garden without it being necessary to believe that there are faeries at the bottom of it? " Douglas Adams
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7th July 2008, 12:47 PM #2
Yeah I've had this happen to me before with a drill bit that came in the box with a cheapie cordless drill. The drill itself wasn't very fast either and you could see itself untwisting whilst drilling
Cheers
DJ
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7th July 2008, 02:06 PM #3Senior Member
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Why accept this - $50 is $50 - take them back and ask for a refund or store credit on the grounds of them being not fit for purpose.
Even if it's been a while or no docket, it's still worth a chance.
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7th July 2008, 03:02 PM #4
Had it happen a couple of times with cheep masonary drills , gives you a weird feeling the first time it happens
Ashore
The trouble with life is there's no background music.
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7th July 2008, 06:58 PM #5
I have never found Titanium coated drills from respected tooling makers, maybe because I don't look around for them. The better set that I had was a Makita set (abt 8 years ago). Wasn't overly impressed with them, but a bit better than some Bosch in a driver set from a couple of years ago.
I can't really grasp the concept, a treatment and coating to improve product quality, but what happens the first time you sharpen the tool, you grind through the coating and have a raw cutting face.
The Mak and Bosch sets that I mentioned aren't up to the standard standard of P&N or Sutton HSS, let alone carbide, and all the others seem to spray a bit of gold paint onto mild steel blanks and pretend that they are a superior product, rather than pure cr*p.
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7th July 2008, 07:09 PM #6
take 'em back and get your money back
if they bend like that they're obviously not "merchantable quality"
ian
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7th July 2008, 07:10 PM #7Senior Member
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Drill Bits
Never seen anything like that before, sure as hell wont be buying anything from SuperCheap either, they look like painted licorice sticks.
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7th July 2008, 09:32 PM #8
Yeah I should take them back, but I bought them at a branch in the bush, and even if a local SC would refund its still $15 of gas away.
I'll just use them to finish the hole, even these licourice drills should cope with < 0.3 mm.
Problem is that to get a decent set at these increments would be north of $250
Malb
There are some decent ones out there. I bought a set of no name titanium coated drills from Bumblings for circa $20. 1 mm to 13mm at 0.5 increments. This was 3 yrs ago and I still have the set, intact, cut beautifully and still sharp. You can be lucky sometimes.Bodgy
"Is it not enough simply to be able to appreciate the beauty of the garden without it being necessary to believe that there are faeries at the bottom of it? " Douglas Adams
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7th July 2008, 11:10 PM #9SENIOR MEMBER
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8th July 2008, 08:40 AM #10
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8th July 2008, 10:58 AM #11
Bodg,
I know the set that you bought, I bought the same set a few years ago and couldn't believe the price until I tried to drill in hard wood. They are the softest steel imaginable, they bend, break and of course they don't hold any sort of edge. They sit in my drawers and only get used in pine. Outrageous that they still sell this stuff. I know that quality drill bits are expensive but you need them with the sort of tolerances you want for metalwork.
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8th July 2008, 11:12 AM #12.
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I have seen this before with some supermarket branded bits. I was at an elderly relatives place and they needed a hole drilled in a trailer. The two bits I tried unraveled themselves just like in your picture.
On the other hand I have to say my McJing bits have survived everything I thrown at them. I have snapped a P&N 3/8 bit with my 1HP DP drilling a hole in a 12mm hardened steel plate but the McJing bit went on to cut the 7 other holes in the same plate. OK maybe I was a bit greedy or over zealous with the P&N bit or it could have been damaged or weakened previously.
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8th July 2008, 03:11 PM #13SENIOR MEMBER
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16th July 2008, 11:10 PM #14Novice
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I like to watch...but this is my first thread.
Scare the pants off the so and so's and mention to them a small piece of legislation called the Trade Practices Act. This act required the vendor not to engage in any practice that is false or misleading otherwise they have been engaged in deceptive conduct.
Regardless of whether the item is $5, $ 50 or $ 500 the drills have to be capable of doing their job i.e. drill a hole. It doesn't matter that they are "Cheap" - they have to be fit for purpose as you have said.
They cannot refuse your claim! They cannot argue that "What do you expect - they're cheap"- No they aren't! They just are not fit for what they are supposed to be for.
Don't lie down on this one. I am sick of seeing people get ripped off in small amounts, while some of these retailers make their millions out of selling defective rubbish to unsuspecting customers.
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17th July 2008, 07:29 PM #15
I bought this exact same set a few years back. Needed some funky drill bit size for some project this set happened to have. They worked ok in wood, but were not all that sharp to begin with. I had run a few through my Drill Doctor sharpener and they work ok in wood. First time I tried to drill metal though, the metal piece I was drilling turned the drill bit down to a cylinder, just like on a lathe. LOL. They are crap for anything but pine out of the box. If you can sharpen them up properly, they can be ok for other woods. Needless to say, I only buy P&N or Sutton bits now. They are the best for all kinds of drilling.
How much wood could the woodchuck chuck if the woodchuck could chuck wood?
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