Masonry bits: what's the best type?

[Music] g'day followers welcome back to the bench and today we're going to be looking at what difference the drill bit shape makes so i've got four different bits here they're all makitas 12 millimeter diameter and aside from this one they're all 210 millimeters long this one's 215 for some reason we got a standard we got a v-plus we got a center plus and we got a nemesis 4 cutter so let's take a closer look at them and in terms of price the standard is pretty damn cheap i got this in a 15 pack and it ended up being 327 per unit the v-plus was about three times as much at about 950 per unit single pack center plus was about double the price of the standard at 650 single price and the nemesis four cutter that was 15 bucks so about five times the cost so under the microscope let's take a closer look so the standard drill bit is basically a straight edged wedge for a chisel the v-plus same kind of shape but it's got a little bit of texturing on there there are three little bumps which supposedly break up the concrete a little bit better so the center plus is pretty much a flat blade but with a little point in the middle that's meant to keep it centered while it's drilling and presumably you know drill more efficiently the nemesis is a four cutter it's got a full carbide tip profile is pretty similar to the center plus it's got a flat kind of profile with a little point in the middle and little chamfers on the corners there to stop it from binding into rebar and breaking so the first test is going to be a speed test so i've got some 55 mpa concrete out the back and i've just got all these guys drilled in 100 mil and for this test i use the old bosch bulldog so this is a corded version so i don't need to worry about batteries running down or anything like that [Music] [Music] [Music] do [Music] [Music] so averaging up a few of those runs the standard drill bit number one ended up with an average of 17.17 seconds the v-plus ended up with an average of 14.76 seconds drill bit number three the center plus ended up with 12.63 seconds even faster and a little bit slower uh 15.36 seconds was the nemesis so that's kind of interesting but not not super surprising if you consider that the the nemesis just has a lot more surface area you know that's essentially a blunter cutting cutting edge than this guy so each blow is going to be spread out over a bigger surface area and yeah slightly slower but still very efficient so during all this drilling uh i noticed drill bits one and two had a fair bit of vibration going on a bit of shutter uh and it didn't really seem to go away but drill bit three the center plus that started off with a bit of a shutter bit of a vibration uh and then once it got down into the material a bit that kind of smoothed out one thing i really noticed using these was the four cutter oh man this thing noticeably smoother pretty much the whole way through than the other three this felt really nice to use but this got me thinking you know what's an easy way to quantify the amount of vibration so anyway i got this phone uh downloaded this app from bosch which is uh i n v h cool little vibration meter app here and see a little trace there and i strap this to the drill so don't worry about this this thing is unnockier uh and as you can see it's a little bit damaged already because i dropped this off a cliff a while ago and uh you know it's still works pretty well so let's take a look at all the traces together so you'll notice they're all kind of jumping around all over the place this is vibration data after all the blue line is the up and down axis and the red and green are the horizontal axis so like side to side for the phone and front to back for the phone you'll notice that they are kind of jumping around all over the place but in general the blue one here is lower than the rest these guys tend to be around 25 and 30 and the blue tends to be around 20. the other two do jump around a fair bit more but in general these guys are sort of between maybe eight and twelve whereas the bit four tends to be you know maybe between sort of six and ten in general good spot to pause it so yeah that's that's illustrating it pretty well there all right so that's that's fairly clear that the uh the four cutter is vibrating a fair bit less than the others so of course my little camera here can actually do a thousand frames a second slo-mo part of the reason i got it sony zv1 and yep it's pretty bloody handy because this actually is going to allow us to see maybe why these things are actually vibrating so much so let's take a look at bit one you'll notice from the very first blow this thing is jumping around sideways there's a fair bit of deflection going on and uh even once it gets down into the material a little bit it's sort of jumping side to side a little bit also big chunks flying off here drill bit two once again we have that kind of side to side deflection from the actual chisel tip there beautiful crutch in the background there look at that magnificent drill bit three the centering point is that going to help cool so from the very first blow that little tip is fully in the material and uh oh it's blowing big chunks off but it is actually still deflecting a bit and yeah i did notice this when i was drilling that shuttering kind of stopped when it was you know a few centimeters into the hole so the centering did seem to actually start working and the nemesis we've got there's a little bit of deflection a little bit of bouncing sideways just to start off [Music] but once that tip is embedded into the material it really just starts you know drilling nice and straight really going to town on that stuff oh look at that flute spiraling there is pretty mesmerizing too very cool so there you go bits one and two tend to bounce sideways with the impacts of the drill centering point did did start digging in and start drilling nice and smooth after a while but the nemesis she started drilling pretty smooth pretty much from the start and these ones are actually meant to have better hole quality as well i guess because it's not going to bounce side to side because there's actually stuff on the side there that's going to keep it centered a little bit in the hole there so i went and had a look at just the roundness of the holes like are they all perfectly round and yeah they mostly were pretty much all of them were i did see one or two with the standard that were kind of slightly triangular with that sort of three lobe shape and also one or two with the center plus strangely enough so to finish this off i also wanted to get an idea of uh lifetime basically so i just kept on drilling you know just drilled up all that concrete and when i ran out of concrete i went and got a bit of granite and went to town on that so about 15 holes in the granite as well with each one of these bits and to be honest they still look like they're in pretty good nick i was rougher than i would normally be with these drilling downwards so the hole stayed full of dust and also never cleaning them never letting them get cool just bang bang bang bang bang so i did try my best to cook these bits really wear them down but honestly it doesn't look like it really did all that much i mean they're a little bit duller the center plus has some of its little nubs worn down but other than that like they're all still in real good nick so let's just see if they lost any actual diameter before use drill bit 1 measured 12.28 millimeters across the tip and after use measure 12.22 drill bit 2 measured 12.38 before use and after use measured 12.3 centering bit measured 12.32 before use afterwards measured 12.28 drill bit for the nemesis measure 12.29 to start with and afterwards 12.26 the nemesis actually has these little wear indicators on the side so still plenty of meat left on there good to go so in summary let's take a look at all the results together uh in terms of price the standard was the cheapest followed by the center plus and the v plus and then the nemesis in terms of speed uh the fastest drilling bit was the center plus the v plus was the second fastest the nemesis was the third fastest and the standard was the fourth fastest in terms of vibration so user comfort the nemesis was the smoothest to use the least vibration second least vibration was the center plus and then the other two they felt about the same so i gave them an equal third and in terms of where the nemesis was again the best and center plus was again the second best the standard had the third most wear and the v-plus had the most wear so if i just average up all these ranks from these tests then the uh the the best run overall was actually the center plus uh next was the nemesis followed by the standard and uh then the v-plus so which one of these is the best style of drill bit for you um look i don't really like saying you know best and worse and stuff like that because at the end of the day it depends on your requirements you know what do you need what's good for you i mean my requirements are probably going to be different to yours for example um if i'm using these these bolts in a rock climbing setting i need to use this drill okay there's no two ways about it lives depend on this thing going into a nice round hole so for that kind of stuff i'm reaching for a four cutter every day of the week but for all these speed tests i do for the youtube videos i usually use these ones the standard because they're the cheapest you know i've got to grab a new drill bit for every single one of these tests and that bloody adds up so i want the cheapest one that's you know not that's still going to be decent and these are decent anyway guys uh the gang and i would like to thank you from the bottom of our uh shanks for for watching this far under the video i hope it was helpful and um yeah don't forget to do all the youtube [ __ ] you know like and subscribe and all that and uh just a little psa i'm gonna start uh a new channel where i can stick all my rock climbing stuff because you know the power tools stuff and the rock climbing stuff pretty different audiences so if you are a frother for the rock climbing stuff head over to the new channel uh i'll put the beats down below and if you're a total hammerhead and you're just interested in the rotary hammer stuff then stick around here so yeah scratches later guys thanks for watching

Channel: Boltah Downunder

Views: 5,438

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Id: Ly9V4xzQRHw

Length: 13min 12sec (792 seconds)

Published: Wed Sep 07 2022