Machining LARGE chamfers with a small tool!

Machining large chamfers with small tools! Let's use standard sized tooling with the Bore function in Fusion 360 to machine large, smooth chamfers with a great surface finish.
00:00 Intro - Large Chamfers with Small Tools & Bore in Fusion 360
00:34 Don't Do This Unless You Have To! Using a 3/8" tool to finish a 1.75" Chamfer
00:55 Tooling Options: Bullnose/Ballnose Endmills
01:28 Lakeshore Carbide 3/8" 82 Degree Included Angle Tool & Mill Drills
01:54 Roughing Strategy with Helical 3-Flute Radius Endmill
02:11 2D Bore in Fusion 360 & Tips on "Pitch" Field
03:00 Quirk: Speeds & Feeds are WRONG and What To Do
03:49 Boring VS. Surfacing Toolpath
04:40 Benefits of 3D Ramp Toolpath in Fusion 360
05:19 Final Thoughts & Outro
5 Reasons to Use a Fixture Plate on Your CNC Machine: bit.ly/3sNA4uH
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Reach us / CNC Info:
Speeds & Feeds: provencut.com
Fusion 360 (Purchase, Support, Training): dsi.fyi/3yu7Mt0
Online Fusion 360 Training: bit.ly/LearnFusion360
SMW Products: saundersmachineworks.com/
CNC Resources: www.nyccnc.com

[@jakobhalskov]

Even though I don't own a CNC or have access to one anymore, these videos are so inspiring and informative to watch. Thanks for producing so well made content for free for us! :)

[@t.c.sbunch-o-stuff5907]

Good video. I've been a machinist for around 30 years, I currently run a Mazak Integrex e-410H II, I have used this technique many times to make large or odd angle chamfers or countersinks, I use a ball endmill, it takes longer but you don't have to worry about slight angle mismatching, also a ball endmill will always be the same shape regardless of manufacturer so the depth/diameter will be correct first time every time, also also you can use the same tool to make different angles for different features on the same part saving slots in your tool changer if that becomes an issue. Like you mentioned in your video the downside is more machine time. I work in a job shop where new parts are programmed and setup almost every day for almost every machine so being able to create multiple features with less tools is a big plus.

[@nickp4793]

Thank you so much for this video! I'm working on a roundness tester for my billiard hobby, and needed to chamfer the ID of some threaded aluminum spacers from McMaster to JB weld a ball bearing in the resultant nest left by the chamfer. I'll have 3 of these sub-assy's that will cradle a billiard ball, as I spin it against a test indicator, checking the billiard ball runout. Things I learned from watching this video a few times: 1) My toolpath would not generate, because I had the tool type set to spot-drill instead of chamfer tool. 2) You can make a section in the manufacturing space and turn it on during the cutting simulation. Wow, that is a gem! 3) How to rough with a flat mill and then finish with a chamfer mill a large chamfer. Great job!

[@audiocomplex]

That’s exactly what I was looking for some days ago; I did not know that the bore operation can do chamfers. Thanks a lot for your awesome video channel!

[@Reach41]

All I have is a Sherline CNC milling machine, using Fusion 360 for design and tool-path generation. Even with this tiny machine, most of your videos, including this one, are applicable to the things I do. Thanks again!

[@Neogeobrian]

Holy smokes John, thank you. Been using Contour multiple depth with wall taper for years and your way is so much faster. This will make the feature on my part so much easier to produce. My old way got the job done, but is a pain if you don't get the wall taper exactly correct. Thanks again bud.

[@fabtown1457]

Huge fan here of everything you guys put out. Thank you a million times over. I can say with out a doubt the information you have provided has drastically changed my life for the better! Thank you !

[@nyccnc]

Thanks @Fab Town! -John

[@cylosgarage]

Dang. I honestly never knew the bore toolpath could do tapered holes. Thank you expanding my toolbox and helping me be a better machinist

[@greg2337]

Its a great way to start a taper before NPT tapping in tough materials. No need for a tapered reamer

[@capnthepeafarmer]

Thanks for this tip! I had this issue before and I never knew the bore tool path could do that. I solved it in a more hacky-fusion mindset. I made a lot of circles at different planes that intersected the chamfer and then used the 2D contour to make the individual paths. Way more complicated than your method.

[@piccilos]

love the quick how to videos, easy to come back to when i have a problem

[@nyccnc]

Secret: all these videos are just for my reference in the future when I forget how to do something

[@dannywilsher4165]

Thanks John! I love your videos and content!!!

[@richhuntsd12]

Interesting John, If you get order your chamfer tools with a small top and bottom radii, Like .01",or.02" it makes a big difference on the blends. Nice video

[@nyccnc]

ooh I like that

[@jasontartaglia5864]

Thanks John! Great stuff. Would love to see more Fusion…

[@danpesonen2774]

HEY John!!, It's Dan here DR Electric. Just doing my weekly checkup on new NYCNC videos and what do I find? You made a video on my question. So awesome. Thx! And followup, I got my chamfers to work awesome with the advice from Ed!

[@dmbworks8094]

to do this i use a standard contour to chamfer with roughing passes and use chamfer tip offset to adjust the height by selecting the top of the chamfer and not the bottom. it works out a lot like the ramp tool path example except with roughing passes. i copy the tool path to add depths of cut. i dont trust cutting with the bottom of the chamfer tool but i do trust chamfer tools from lakeshore, helical and others to provide the most accurate chamfer tools and i have not had any noticeable machine lines from stepping down. not that my way is better, just thought id share one more way.

[@anthonyambler7118]

I do that quite a lot works really well

[@tugyjones6690]

I have to do this on large holes at my job, In master cam, cause our hole was large enough, started from bottom up to rough to use the whole end mill then down with the chamfer, same kind of process in fusion at home, excited to try the bore tho thanks for the tip.

[@zviper]

I litterly just was looking at my 4mm chamfer mill thinking, can I use this for a much larger countersink. Perfect John, THANKS!

[@romansholyak2332]

What about using spiral toolpath with In - to - Out option turned on ? Mill will cut by one side edge instead of cutting from top side and going down .

[@kylehofmeister6906]

Do this with a small multiflute ball endmill too if you dont have perfect chamfer cutter.

[@Geebuv]

Awesome video! Definitely gonna tuck this in the back of my head. Have you tried this method with a flat bottom chamfer tool? I ran into this and I had a similar thought to try but was worried the flat bottom would cause galling. What about a large straight chamfer along an outside edge?

[@weldmachine]

It's definitely a great idea what you showed in this video. But I find using an Insert Countersink works best overall. Much quicker and more accurate.

[@johnl5177]

Been watching you for close to a decade now I've been using this trick for a few years now have some large countersink bolts I use and I use spiral with a ball nose much better than the old hss bits

[@djdelorie]

If you've roughed the hole, could you bore with the chamfer tool from the bottom up, so that most of the cutting is done with the larger radius part of the tool?

[@Eggsr2bcrushed]

Most chamfer mills dont have flutes on the side/shank.

[@lwilton]

@@Eggsr2bcrushed It might be interesting to do a roughing pass as a series of almost max height stepdowns, say 3 or so of them, then come back with a ramp finishing pass with a fairly high helix angle.

[@gamingpc3475]

You can use the thread mill tool path the same way and select bottom up

[@alwayscensored6871]

I use wood carbide tooling on plastic and aluminium. Come in all sorts of shapes, cheap too. Ok for small jobs Never tried on steel.

[@Worrsaint]

Have you looked into using indexable countersinks/chamfer mills? Might save you a lot of time while not breaking the bank.

[@triggerguard1]

That's what I was thinking. Those holes would take about 2 sec..

[@michaelw5456]

Do you know how long it took me to figure out how to do it with Camworks. Stepping in chamfer's was quite the process.

[@ipadize]

could you just not use a normal HSS countersink tool? Those are relatively inexpensive and can be much bigger in diameter

[@otis76885]

How about doing this on a feature that is not a hole?

[@OttoHarmonicaMania]

I always use Spiral...

[@sanches2]

Where was this 7 days ago :) i made it but it took me more than 2/3of a day

[@hillfortherstudios2757]

In my experience the ramping toolpath get broken up by fusion into far too many lines. It will not be processed efficiently by the machine. I have spoken to fusion about this. Thanks fkr the video!

[@marley589]

Here are some links to chamfering ideas. For big external chamfers - kzbin.info/www/bejne/n2OuYZR7Z5WNZ80 And for quick multiple ones - kzbin.info/www/bejne/o3mtfqifqd94hMU They aren't internal but may be interesting to your viewers searching for chamfering information.

[@wagglebutt]

Friendly feedback... Something on your desk is rocking. It's pretty distracting in the audio.

[@nyccnc]

sorry about that!

[@wagglebutt]

@@nyccnc no worries. I think it might have also happened in an episode of the BOM too, which is why I mentioned it . Also, thanks for the tips in the video.

[@randykamiena5583]

😩 Promo'SM!

[@tates11]

Here are some links to chamfering ideas. For big external chamfers - kzbin.info/www/bejne/n2OuYZR7Z5WNZ80 And for quick multiple ones - kzbin.info/www/bejne/o3mtfqifqd94hMU They aren't internal but may be interesting to your viewers searching for chamfering information.