Boring head adapter with issues!

foreign leaves everywhere uh hi welcome back to the shop it's good to see you again I bought a boring head to adapt for my CNC mill so uh let me explain I've been experimenting with um through spindle coolant with some 3D printed test tool holders but more of that in the future I've also been making some embryo tool holders for my Mill so again more of that in the future but uh this is what I'm here to talk about today this is it it's a 38 millimeter inch and a half diameter um in old money boring heads with a 2mt shank and it comes with a few bits for three tools and a couple of Allen keys and uh it cost me about the 38 dollar pounds I think it's no longer going to be no longer stocked I suspect in the place I got it from so they're just selling them off and it's Imperial and here in the UK Imperials getting rarer shall we say um now I bought this because uh what I wanted to do is adapt one of my embryo tool holders to fit it and I thought right I'll um I'm gonna have to machine this down to a parallel or machine a 2mt table in the end of that and I thought um that's difficult but luckily it and threads that is an M14 by one millimeter pitch 14 by one so uh that's going to be relatively easy to replicate on the end here and it'll just screw on so uh let's get on with that I've already got my collet Chuck in so let's put that in and tighten it down let's make chips foreign so here's why pushing your leg that hard is good and bad uh it's bad because you're pushing your legs quite hard uh it's bad because the part and the chips are bloody hot but I get to have a cup of tea while it all cools down tada no even I think it's a step too far that's better all right next is a little chamfer on the end to get the uh so the threading tool just hit too hard when it starts I'll put a gutter in so the thread the tool has got somewhere to run out thank you right that has to go down to the minor diameter of an M14 by one so what we got there 11.55 that's close enough for me this has never been a problem before but here's my thread dial indicator and uh once the tool is at the end there isn't space to get it in so uh I'm gonna have to do this with a lathe permanently engaged to the feed screw and just walk it forwards and back foreign I don't think you can see it at all oh that's interesting there is an error there this is what I've been doing uh I've used the carriage stop the indicator that I made in the last video against the saddle it's the lasers in thread cutting gear so the half nuts are engaged and I've marked the top of the top dead center if you like wrong analogy but I've marked a point on the casting for a zero and I've also on this ball gear put a mark as well so when those two line up that's where I start my measurement so pulling the lathe over by hand I can see how far The Carriage has moved and when I line up the marks again I'm spot on at one millimeter travel however this is why we do a scratch cut this lathe is wrong if you set the change gears up which are in inside this housing with a 42 to 20 120 127 and a 40 tooth and put it into C6 you should get a one millimeter pitch however that comes out at 1.06 so hence there's an error so there is another one here that if you change to a 32 32 pinion and a 32 at the bottom and you go into C1 you get a one millimeter pitch that comes out at two millimeters so C6 which is what I'm in at the moment with this configuration of Gears so C6 should be 0.75 is actually one millimeter so um this lathe this plate is all over the shop we are now back we're now back to where we should be I think so uh now I've established the right gear ratio that was an hour well spent uh we should be able to just move in and take a scratch pass so um let's have another go thank you Moment of Truth thread gauge yep yep that is indeed a one millimeter pitch what a palava what pavlover that was half an hour later I've finished cutting the thread it's not the best thread I've ever cut but uh it's good enough for these so all I need to do now is put the blades back into high speed and our back gear and chop this off to the right length and uh face off this um this boss here put a tiny little chamfer on it and Bob's your auntie my God you could ride bare ass to York on that not a tooth left on it right another blade not new but I don't know that's better hurray right oh ah that'll be hot right back to half rocket speed so here we go chamfer new tool to me bought it only yesterday so uh let's see what we get with that oh that's nice yeah whoops oh spot on as that there we go let's try that out in the middle right we've got a crappy old piece of aluminum uh six mil uh carbide End Mill for aluminum uh and um yeah just gonna make a 15 millimeter hole in that so uh cycle starts [Laughter] so I've put the new Tool uh holder with the new pouring head in the mill uh I've um finished boring out this this holder and I'll show you a close-up you if you look closely you can see some facets on the inside of the hole and that's I mean I think that's one of the things you're going to get with these hobby grade machines the um the minimum step because it's a digital system it's stepping this way and stepping this way your to do a circular interpolation it's always going to be an approximation to us to a circular hole that's why putting a boring bar in actually this is going to scribe a perfect circle so um if I just jog that down I've set this up so that um it should take a tiny little cut the tool is lined this is the very very first time I've tried this it's all set up and clamped down so uh let's run it and see what happens M3 speed 1000 on it's a little bit quick speed 900. it's been 800 that's better that's doing 600 560 RPM is that right 600 RPM yep right so now if I G1 Z minus four moving on I can't type g1z minus 14. a feed of 20 millimeters per minute let's see what happens there we go well blow me it's actually cutting a whole there's some marks in the in the wall uh I might just run that again just to take out a little bit more and see whether that improves foreign there we go the uh he's clearly going to leave these marks and I think I know why and I'll show you so here we are at the optical comparator and uh if I set uh you'll have to set my word for this because it's a bit tricky for me to get it but that point there which is the the the main shaft of this tool is eight millimeters so what I'm gonna do is all right uh we have a wheel over it uh what I'm gonna do is right in the center I have uh I'm on the corner of the chamfer uh of that major diameter and I've set my dial to zero so if I go down that's one millimeter two three four five six seven and get right on the other side there we go I make that at 7.92 so let's let's call that eight millimeters because it it pretty much is um so if I go back up to four one two three four now I'm parked right in the middle of that of the major of the clamping shaft hopefully that makes sense so now let me just run this over this is the business end of the tool and there you go hopefully you should be able to see enough of it as I rotate it if you rotate it you can actually just see back there oops let me just see if I can focus up a bit there we go you can just make out where the where the cutting face is perpendicular to the uh to the light source and you can see hopefully you can see that it's no longer in the middle so if I move that up to being in the middle I can tell you exactly how far out it is it's 1.7 millimeters so uh so what I'm trying to say is the the center line of the tool should be the center line of The Cutting Edge should be exactly on the center line of the tool and it's 1.7 millimeters tall too high so uh this this tool will never cut properly it's as simple as that well there you have it if you um want to buy one of these cheap import boring heads and uh and make an adapter to fit your machine feel free go ahead it's um it's a worthwhile thing to do but I've I've read on the forums that people have said that the uh the tools that they come with are rubbish and uh if my if it makes sense with what I did with the little Optical comparator you can see this will never cut properly because um it you'll never be able to get it on Center Height so the thing to do with these is in the bin of Broken Dreams and grind your own I've got some eight mil tool steel on on border so um hopefully that'll be here and I'll grind some tools up but uh thanks for watching please hit the bell and subscribe button and we will see you on the next one take care bye-bye

Channel: Cazual Haze

Views: 4,531

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Id: 6vgjTuGjyEo

Length: 16min 11sec (971 seconds)

Published: Fri Oct 14 2022