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Tool Bad drills

Tool

PeterT

Ultra Member
Premium Member
In all fairness, I didn't have high expectations. A 13 piece set of metric drills from Ali for 4.16 CAD including delivery. It was part of a sale where you had to pick 3 items. This was going to be my 'who cares' set like fixing the gate, drilling drywall & other abuses.

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Side A, looks like a typical back relief angle. Something funky as it approaches the cutting edge to right though...
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Side B. Hmm... relief (green line) not quite the same. Some other dills were actually going negative dipping to the right
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Yowza!
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For no extra cost they even coat the fluting swarf!
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Fortunately I just so happen to be putzing away at a split point accessory for my TCG. A perfect test project. (This is just by eye, work in progress).
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Well I'd like to provide a happy picture of a 2 perfect swarf entrails coming off a shop re-sharpened tip drilling a block of metal. Unfortunately, once spinning in the chuck, the tip was a blur. Hmmm... measured +0.060" runout, so warped like a banana for good measure. BTW it wasn't a one drill issue. Every second one had these issues or worse. I'm thinking at best maybe they gather the defects & package them up as a set, but who really knows. This is why I avoid the handyman stores & try & stick with tooling suppliers. There are plenty of good ones where the quality is top drawer & well priced. In all fairness I have seen the same thing from Crappy Tire & Princess Auto who should be a little more diligent to avoid passing crap onto customers.
 
i bought some cheap stubbys from ali that were so dull they wouldn't drill cheese ! another one of those "well its so cheap, who cares"

that being said i have had some good bits from them
 
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