DRILL DOCTOR 400 SHARPENING SHOW N TELL 135deg POINT

hi guys dct mates here um drill doctor the older style one 400 i'm just gonna try and do this because this is a nasty whiny uh beast when it's running so you uh you can't hear much when it's running but um here's a here's a drill that's been put through heck and back and we're going to try and bring it back so you guys can see so there's all kinds of junk in here i'm just going to scrape out some of the junk it's been in the dirt and hit some hit some hard metal right so anyway this tool does a great job you're not going to hear an awful lot when it's running but i'll walk through it before i actually switch it on and do the task so first part's easy you put it in this shoe it's got some little cutouts put it in the shoe till it till the little tiny collet is just holding it just tight enough so it's not wobbling around then in the side you locate those up those notches and then in here there's a button that has two teeth that open and close and they have got to go into the flutes as close together as they can be and that's going to set the geometry up for when the drill is put over into here and cut on the diamond wheel so let's try and set that up right okay so pushing the drill forwards i'm turning the drill from the back getting the two teeth grabbing the flutes tighten the drill up and do it take it out now again it's going to make a heck of a noise so what happens is now that set the geometry up so when you turn this there's little tiny marks here when you turn this and it goes around this cam it actually presents the tip of the drill to the diamond dressing wheel in here these do the base 135 degree cut which is normally for harder materials uh you'd have to change it for softer materials would be like 118 but this is an all round you know you could cut you can cut wood with it you can cut metal with it you get harder metals depending on the drill obviously this is these are high speed steel drills um we're also going to do a relief cut on the back and i'll i'll do a little picture of some drill geometry here most 99 of people are never going to get into like all the way down into ultra set geometry and how cuts are done and how this but just a general rule of thumb kind of thing so we're going to clean this drill up okay so i'm going to be putting it in here i'm going to set it up with a white mark with a tab and then i'm going to turn it and you have to do everything twice so i'm going gonna go around once it's gonna pick up the drill it's gonna cut see sparks out of here comes around again cuts the other flute so you do that repetition of three so you'll do six physical cuts if it's still cutting on the third one you can run it through again real light to kind of like get a real shiny face on it and then we'll do a relief cut but i'll show you what it looks like afterwards after straight cutting i got bad ears i'm gonna put my muffs on here get ready turn your speakers down [Music] [Applause] [Music] and then drill geometry is uh extremely complicated you have a chisel cut you have lips cutting edge flutes you have a relief cut that we're going to do in a second that's going to less of the land area at the back of the cutting angle is going to allow the drill to cut with less heat wear out less and cut slightly quicker and that really depends on what kind of material you're cutting but that's dressed up real nice from what it just was i hope you can see it so basically that's the that's the jill the drill geometry there cut in face chisel point this is the part that starts the cut these two faces do the cutting now the flutes take away the material now what we're going to do now is we're going to put a relief cut across there i hope we can see it i'm going to put a relief cut in here to actually shorten this so it would cut quicker again it's going to be loud you do that in this part of the machine and again it uses these little tabs to actually position the drill as it touches the cutting wheel from a different direction this time obviously here we go [Music] [Music] [Applause] and that's about all it takes and you'll see this if you can see it just takes off the back so it shortened the it's shortened the actual cutting surface just a back relief cut that's it you got any questions give me a shout yeah there's a better there's a bigger drill with a relief cut on the back less surface area less friction cuts quicker also wear out quicker too less of the less material so it's a tricky thing um but you got any questions i know a little bit about it doing it at rolls royce but um if you've got any questions give me a shout there's lots of videos on this um subscribe say hi see you later guys bye

Channel: dctmakes

Views: 74

Keywords: dctmakes, drill doctor 400, sharpening drill, 135 degress, drill cleanup, relief cut, chisel point, flute, land, cutting edge

Id: yUzP55ZnoHc

Length: 7min 18sec (438 seconds)

Published: Fri Sep 17 2021