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BLACK+DECKER 15557 10-Piece Drill Bit Set
|Price:||+ S$7.76 Delivery|
- These accessories should be used with a drill with a 3/8" chuck.
- This 10-piece Drill Bit Set contains the most popular range of drill bits - sizes 1/16-in to 1/4-in
- Comes with a handy bit bar that makes storing this set in any toolbox, pocket or kitchen drawer easy
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Includes (1) 1/16 in. HSS Drill Bit, (1) 5/64 in. HSS Drill Bit, (1) 3/32 in. HSS Drill Bit, (1) 7/64 in. HSS Drill Bit, (1) 1/8 in. HSS Drill Bit, (1) 9/64 in. HSS Drill Bit, (1) 5/32 in. HSS Drill Bit, (1) 11/64 in. HSS Drill Bit, (1) 3/16 in. HSS Drill Bit, (1) 1/4 in. HSS Drill Bit
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Most helpful customer reviews on Amazon.com
> These are general purpose (metal or wood) bits for holes from 1/16" up to 1/4". They are NOT meant for masonry, etc. You can drill holes in soft gypsum wallboard---but that quickly dulls the bits. For brick, masonry, tile, concrete etc, you need masonry bits and ideally a power hammer drill.
> TO MINIMIZE BREAKAGE: When drilling through thick metal, keep a drop of oil in the hole. The oil facilitates cutting and also helps cool the bit (which is important). If drilling deep holes in metal, or even hard wood, cut a little at a time, pull back for a few seconds (clearing the hole of cuttings), cut a little more, pull back, cut a little more etc. If you think the drill bit is getting hot, just pull it out of the hole and let it cool a few seconds---maybe drip oil on the bit to cool it. Be cautious touching a drill bit to test how hot it is---a hot drill bit can cause serious burns. Do NOT use water to cool a hot bit---that may cool it too fast and make it too brittle.
> Let the drill bit do the cutting---do NOT press hard when using small bits. In fact, sometimes you have to pull back to keep a sharp bit from cutting too fast (and getting jammed).
> Assuming that you have a variable-speed power drill, you'll have more control, especially when drilling wood, if you drill at MUCH less-than-the-maximum speed. When drilling metal, the drill bit will drill cooler at a less-than-maximum speed.
> If you are buying your first bit set to go with your first power drill, consider buying a larger drill set (with up to 1/2" or so drill bits). Larger drill sets are only a few dollars more, but you are unlikely to ever break or dull a drill larger than 1/4". Eventually you'll break several of the smaller sizes (that is, drill bits < 1/4") and then you'll need a set like this B&D 15557 set to replace the small sizes.
> If you need to drill a hole in a precise location, make a pilot hole with a smaller bit (about 1/4 the size of the final hole) first. Do NOT try to enlarge a hole one bit size at-a-time.
3 SURE WAYS TO BREAK A DRILL BIT
--> Bits are very likely to jam when cutting THIN hard sheet metal---proceed VERY cautiously. The best strategy is to use a piece of mild steel or aluminum, or even hard wood, as backing if that is possible
--> Bits are very likely to jam and break when used to enlarge a slightly smaller hole---try to cut the right size hole first. If you must enlarge a slightly smaller hole, proceed very cautiously, cutting only a little at a time
--> Bits are brittle and are very likely to break if you try to rock a jammed bit side-to-side to free it. If you have a reversible drill, try setting the power drill on counterclockwise and SLOWLY backing the bit out. If that doesn't work, CAREFULLY unchuck the drill bit, grab it with vice-grip plier and try backing it out (i.e., rotating it counterclockwise) by hand. If that doesn't work, grab the drill bit low with your vice-grip plier, and then pry it out with a screwdriver, etc. Sometimes just letting the bit cool down for 15 minutes will make it much easier to unjam. Such jams are usually caused by trying to drill too fast.
> Don't freak out if you break one, two, or even three bits. It happens, even to experienced workers.
> Click on “Stoney” just below the product title to see my other reviews, or leave a comment to ask a question.
-The price is low,
- the quantity and selection are good,
- The case is sensible and shows bit sizes on the base.
- The drill bit quality of is a bit low, and they break easily.
Comment: I have broken two bits in two weeks drilling into Redwood (softwood) posts. Once, I thought it was my fault -by bending the drill a bit while drilling, but the second time I was careful, straight and patient, the second drill bit still broke!
- If you want some inexpensive, casual drill bits these are ok, but likely won't last.
- If you want something dependable for a long time, then pay more get something different.
Many of the other reviews note, correctly, that these drill bits break fairly easily. I managed to have THREE of them break in the space of a few days' worth of occasional pilot holes, and that is three times as many bits as I've ever broken in that space of time. Also they broke so easily that I wasn't even aware of the snap while I was drilling; I simply noticed the end of the bit missing when I pulled the drill back.
That said, the set is only a few bucks as an Amazon add-on item, and there is a decent variety of sizes overall for that very low price. So if you don't set your expectations high, and just need bits for the occasional drilled hole, these may suffice. Just don't count on them to hold up for very long. And if you need something more durable, spend more than a few bucks.