Are these M-42 grade high speed steel bits?
1548859
I'm not sure what grade they are, but they are the best drill bits that I have ever bought. They work very well, and stay sharp, even after using. I hope this helps.
1548860
I emailed the Bosch Company, this was there reply: Thank you for writing and for your interest in our Bosch bits. I'll be happy to assist you. Our Bosch Cobalt bits are a special formulation of High Speed Steel with Cobalt added to withstand very high drilling temperatures. The % of Cobalt added is 6%. Hardness 66-68 HRC, heat resistance up to 1100 deg F.
2005808
I've spun the rapid load end off of many of these using them in an impact while drilling through hard wood(Ipe). Still good bits.
158988
no they are not. I dont know if they can be, a mechanic I know ran a magnet in a circle in the middle to magnatize my screw driver bit. You should look that up on the internet as how to or call Black and Decker if they have them, magnetic bits are worth it.
1117835
I've used them on hard stainless steel with good results. These bits are tough, but I bought a couple sets just to have spares.
2213606
If they are SDS-Max bits yes they are interchangeable. Some older hammer drills used a spline shank that will not work.
818948
Hi!! The bits are not labeled but it is not necesary for me to know the diameter. Thanks!
2263397
The bits I've read on it say they are, but not 100% sure. Sorry not much help.
593368
The nine largest bits (ranging from 3/16 to 1/2 inch) do have hex shanks. The smaller bits from 1/16 to 11/64 inch have round shanks. I've been very satisfied with these drill bits because they are sharp and so far have remained sharp with moderate use.
1341115
Absolutely, at least I have used them. I believe this hammer drill with a psck of upgraded bits, is the best tool purchase I have made in years!
1145587
I actually haven't tried them for such an application but it is my impression that they will break. I would use much higher quality high speed steel drill bits for non-ferrous metals like copper and aluminum.
2069333
These are not masonry drill bits. I wouldn't recommend that. However DEWALT's DW5207 drill bits set would work.
1439208
Good question. These are not 440 Stainless steel hardened tips and they are from China.
986678
Hmm, no idea really, but I doubt it. They are crappy bits, by the way. Dull easily and rust in a jiffy. I would go with genuine Bosch bits if they will fit. As. Licensed contractor who needs plenty of this gear, I've always had good luck with Bosch products of every sort.
1863686
You bet, but how well depends on the bit. Even though they are more brittle (& pricy) than high-speed steel bits, I've experienced the best results using carbide on steel & aluminum; carbide's smoother/less porous surface tends to be more resistant to loading-up with chips.
1046574
I suggest you read the description better and listen to the other answers. These are very small and precise bits not meant for drilling.
2191722
Yes....they are made to drill metal. Make sure you don't put lateral pressure on your drill....you will snap any bit if you don't use the tool properly. Drill bits are designed to go in/out, up and down, not in and then side to side.
1382100
yes , i use them on tool steels up to 65rockw. stainless is much softer but tough.