Drilling Hardened Steel With Masonry Bits

a video I did a couple years ago I made this knife and I used this chisel this is very flat very hard chisel to make the blade width now a problem I had when I went to put the guard on was I couldn't drill through it with a standard drill bit my drill bits wouldn't Pierce this hardened steel I got a comment in the video seeing if you take a regular carbide drill bit for masonry and sharpen it it'll drill through that of course me being me I said that doesn't work and I dismissed it out of hand without even trying it so what I got to do today is I'm going to actually try to do that I've got a blade set up in my table saw this is just an ordinary tile cutting blade I've also picked out a couple of drill bits and I'm going to try to sharpen these to see if they'll actually drill through that steel to try to sharpen this I'm going to do it the way I normally sharpen the regular twist drill that's why I hold it against the sharpening wheel until I figure that in actually sharp the next one is a higher quality one I know it has good car buy but it is very dull to begin with so a little bit more grinding to do on this one all right I got some oil put on there and I'll try it out and see how it goes okay well I'm impressed and actually made it all the way through pretty clean looking old too and I have a look at the bit and see if it's sustained any damage it did get hot I could hear a chattering but it still looks like it's an okay shape I think that it would cut a little bit more efficiently when it gets to the shoulders of the bit if the sides were ground a little bit as well to make them come a little bit better a little bit sharper there but overall yeah I can definitely see this as being useful fairly cheap way to do a - with that wheel I think that was maybe fifteen dollars I did buy it a few years ago so but yeah cheap for that these are cheap too so especially this one I think this was like two bucks or something this one is a better one this used to be an SDS bit had a wider shank on here to fit in an SDS drill I'll try that next okay I don't think I did as good a job sharpening this one because it seems to be getting dull a little bit quicker yeah that's pretty darn hot too you see it was skating around to begin with the tip the carbide in this is quite a bit thicker and the tip when you know it's not very sharp so skating around to you know punch it with the centre punch would help but that's hard to do with hardened steel I'm going to confirm this actually now by getting a wrench and seeing if I can drill into that I changed a bit to a thinner one this is actually a tapcon bit this is the kind of bit you would get with those concrete screws the blue ones you drill the hole II drive the screws into concrete or brick whatever okay it still looks like it's in pretty good shape although there's some breakage there I did get about 3/4 of the way through with that before it stopped I didn't want to push it I didn't want to burn up the bit although I don't know why I'm not going to use this for anything that might be part of the reason here with this one all my concrete bits are used in some way some more than others this one's probably very used and you know it takes its toll on it beats it up but as for is it possible yes definitely is it a good idea if you got one hole to drill and you've got one bit then sure yeah go ahead and drill with the bit sharpen it up drill in as far as you can go if it starts to slow down or stopped take it out sharpen it up again and you know try to finish the hole but I wouldn't try to do a whole bunch of holes or even plan on doing a whole bunch of holes because it looks like it won't do it and so epoxy here that I'm going to mix up to glue my sharpening stone back together that I dropped on the floor a couple months back I figure I'll see if it works if it doesn't I'm not out anything because it's not much good as it is now anyway mix this up spread it on clamp it up and see how it works okay I gave the epoxy several hours to dry take it out of the clamps now let's see if it actually stays together I use this stone with oil most of his life just chipped off a little bit there so the oil might affect the adhesion of the epoxy I've taken an old grinding belt and clapped it down to my workbench here and I'm going to try to flatten the stone a little bit with that I don't know if it will work worth a try though like I said you know I'm not losing anything here and I'm definitely not losing anything there the bells is worn out yeah the idea here is not to make the stone dead flat but it's to get rid of the epoxy that's in the area where I glued it and also to get rid of any ridges that might be there I'm not going to spend much time on this be better if I had a diamond flattening plate for this but I don't just try to get you know my money's worth out of this stone I've got a bigger stone that I use mostly now but this one's so handy for knives and stuff like that so like to have it back

Channel: John Heisz - Speakers and Audio Projects

Views: 354,606

Rating: 4.8187733 out of 5

Keywords: Hardened Steel, Steel (Material), Drill, Masonry (Industry), Wood, Best, Knives, Blade

Id: 205cQSUnimE

Length: 7min 23sec (443 seconds)

Published: Sun Sep 06 2015