In the cut about flute count

[@SteveSummers]

Thanks for the video, never gave topic this much thought. Thanks for sharing

[@romanscharnofske3350]

appreciate your comments, being in the cutting tool business myself sometimes the customers do not or don't want to understand that by applying the proper geometries the tool will have less flutes but it will work better. Great info, keep it up.

[@djberg3483]

Its a good night, this and a new this old tony vid. Yup, cant ask for much more, and both on tool cutting. Thanks again Alfred, and keep the lessons coming.

[@rjlenz7875]

Good stuff, thank you for sharing!

[@ianpendlebury3704]

An interesting video, as always.

[@capncharlie7894]

Awesome.

[@Olibrius_stuff]

Thank you for the very good informations, it's so hard to find reliable stuff on grinding, I really like your "In the cut" series. I know it's been discontinued but would you mind doing a video on why a drill can only plunge versus an end mill?

[@georgewocosky]

Production tooling is so often a compromise between aggressive cutting, vs tool longevity . . .bigger 'bites' take less time, whereas more flutes take smaller bites; at a reduced feed rate. Today's methods tend to encourage SPEED , though I'm a dinosaur, *think the tortoise & hare. .. hurry tends to cost in so many ways , so the final question seems to be, 'how fast is fast enough' ? Thanks for putting out the info !

[@alfredlyon27]

georgewocosky the newest cam systems are amazing at keeping constant spindle load as well chip load, chip thinning, and aggressive tool paths. Combined these make tools last longer and keep machine motors and servos at sustained optimum levels. Not so good for finishing which is mostly linear paths.

[@PhoenixKluster]

video on clearance angles (radial and axial) and why to increase or decrease?

[@alfredlyon27]

larry Elashkin great idea 👍

[@NerdlyCNC]

Good vid

[@intagliode]

You always have interesting info on making cutters and operating tool grinders. Caught a glimpse of that cool looking cutter on Instagram. Do you ever make tapered reamers? Only criticism on this one is the video resolution is quite poor. Keep up the great work!

[@alfredlyon27]

Seventy7 Industries I have made tapered reamers. That is what we call in the round tool industry, Z feed tooling and it is very different from milling cutters. For that reason we don’t do a lot of it because of the different set-ups. We will always take a look at any quotes that come in and if it’s something that we feel comfortable making then we will quote it. The quality was bad on the upload because my phone said I wasn’t in WiFi which I was but I figured anything to blur my image is better 😜 thanks for watching.

[@intagliode]

Alfred Lyon lol! Technology eh! Learnt new term today. Z feed tooling! Thanks!

[@1AB09CC3]

Maybe I got you wrong, but is the cutting speed really relevant in relation to how many flutes are in the cut? I thought the width of cut is determining how many flutes are in the cut at any time? Further thank you for describing what limits the flutes. For the first tool: I assume that alternating flutes also tend to chatter less? Last but not least for the setup piece: Is there a softer material than carbide that you use for those things to reduce wheel wear or would anything much softer than carbide clog the wheel. But maybe you create setup pieces only involuntarily like I do :)

[@alfredlyon27]

1AB09CC3 yes, cutting speed dictates how many flutes are in the cut unrelated to cutter width. Cutter diameter is a factor but sfm is a constant given cutter material and part material. RPM changes based on SFM and cutter Ø . For this reason a 1/2” two flute cutter running at 2000 SFM will have less interruption (2 flutes in the material) than the same cutter running at 200 SFM. If you were cutting say M2 and your SFM was 200 you would want maybe six to eight flutes to insure two flutes of contact at that slow RPM. Again this is pretty old school mentality straight out of the Machinery’s Handbook.

[@1AB09CC3]

Alfred Lyon okay. Than i have to think about this again calmly :)

[@alfredlyon27]

1AB09CC3 some shops use some kind of test material but I just use whatever is laying around

[@alfredlyon27]

1AB09CC3 maybe what is confusing here is the term , “width of cut”. Radial depth nor axial depth of cut plays a part in the equation of cutter speed , which is the RPM of the cutter based on SFM and cutter Ø. Cut width or depth comes into play when calculating feed rate , chip load , necessary HP , and loads of other factors. Many people when they are trying to improve finish adjust their RPM but only by adjusting feed rate , chip load, and adjusting the harmonics of the cut can the finish improve. The SFM (and it’s relative RPM) should be constant .

[@1AB09CC3]

Alfred Lyon with width of cut i meant the radial engagement. I'm from Germany and maybe just picked the wrong terminology. My thoughts are based in the following example: when you mill on a conventional machine and engage e. g. 20% in radial direction there are less flutes in the cut at any time than when you would mill a full slot. Based on this "believe" i currently can't follow the idea (or fact, I don't want to allege that it's not like you said) that the surface speed also plays a role for how many flutes are in the cut. But i'll dig into this within the next days :)