Yet another excellent video explaining a procedure which nobody else on youtube explained so thoroughly. After seeing all the steps and effort it takes to sharpen a milling cutter, I won't ask you to sharpen my 200 dull cutters 😂
The sharpening looks spot on . A little tip on milling ,I find using much slower than recommended speeds work better on lighter machines and the cutters last better as well .
Thanks. I fully agree with your point about the cutter speed. For 6 to 10mm cutters 800rpm seems about right on my mill. Granted it's a tad fast for a 5/8 endmill, but dropping down one speed involves 2 belt moves on the pulleys and to be honest for 2 quick cuts I just winged it.
Good luck with finding one at the right price! Make sure there are as many fixtures as you can get as it'll be a lot of work to make them and you're limited what you can do without.
Hi Robert. Great video. Thanks for pointing out that if you slant the gash to the rear, you will loose the center cutting when you go to resharpen. Please do a center cutting four flute if you see fit. Perhaps even carbide using a super abrasive wheel. Carbide end mills really pay for the home shop guy to resharpen. Thanks.
Thanks, glad you enjoyed it. Four flute centre cutting geometries vary, some look ok to sharpen as theyre similar to the 2 flute in the video, and some have little details that I've no idea how I'd sharpen. As for carbide, I have one 16mm which needs a lot of work. Whats stopping me is my current lack of dust extraction on my TC grinder. It's a project in the queue and when its sorted, I'll do the carbide mill.
Recently found your channel and loving the content. Do have a question, though. I understand why you didn't angle the 40 deg relief cut. I agree it would retreat and eventually be none center cutting. However is it truly center cutting now with what looks like 1/2 of each flute being a 90 deg plowing into the work?
As someone who is rebuilding a rusted solid Quorn this is bang on time. I have one question, did you "dish" the end flutes when you reground them by the customary degree or two?
Glad its useful. I thought I'd shown and explained in the video that the fixture was rotated a degree to make the corners proud of the centre. Don't think that footage ended up in the recycle bin!
Just watched both videos. It looked very complicated and involved. So once you're stuck into a few, and in a rhythm , how long to do a two flute cutter?
Setup is the time consuming part. Once everything is up and running 5 to 10 minutes to clean up the flutes as long as theyre not too bad (ie. not badly chipped, just dull). Cleaning up the ends would take a similar time, unless you're grinding it right back and starting again on the geometry. Thanks for watching!
Good video. What do you call the fixture that holds the ER32 Collet and mounts to the table? I would like to buy one. I think with one of those I can use my surface grinder to sharpen end mill flutes.
I think a universal head is one of the names for the fixture that carries the bore. I agree that a surface grinder should be capable of doing the grinding. I often use mine in preference to the TC grinder for several grinding operations when its more convenient, or when the increased rigidity of the SG makes a better job of it. There isnt to my mind much difference between the two machines. The SG usually has a mag chuck on the table, ground flat in situ, which makes it unattractive to remove to fit alternative fixtures.
@@ThePottingShedWorkshop I had a design for one years ago, but never got around to making one. In fact the plans may have been from a book by a guy last name Hall. Thanks for your reply.
Yet another excellent video explaining a procedure which nobody else on youtube explained so thoroughly.
After seeing all the steps and effort it takes to sharpen a milling cutter, I won't ask you to sharpen my 200 dull cutters 😂
Thanks for that. I seem to recall I already have 30 or so blunt cutters from you🤣
A wizard machine oerperated by a wizard.
Another excellent explanation.
Thank you!
I am a new subscriber and viewer of your channel and so far, i have learned some great methods and got a refresher on Trig, Thanks for sharing.
The sharpening looks spot on . A little tip on milling ,I find using much slower than recommended speeds work better on lighter machines and the cutters last better as well .
Thanks. I fully agree with your point about the cutter speed. For 6 to 10mm cutters 800rpm seems about right on my mill. Granted it's a tad fast for a 5/8 endmill, but dropping down one speed involves 2 belt moves on the pulleys and to be honest for 2 quick cuts I just winged it.
I intend to buy a tool & cutter grinder at some point in the future and this will be a really useful resource when I get there. Thank you.
Good luck with finding one at the right price! Make sure there are as many fixtures as you can get as it'll be a lot of work to make them and you're limited what you can do without.
@ThePottingShedWorkshop Thanks for the advice.
found this a good learning vid
Thanks! Thats part of the reason for doing them, to help others get a head start in seeing and learning what can be done.
Hi Robert. Great video. Thanks for pointing out that if you slant the gash to the rear, you will loose the center cutting when you go to resharpen. Please do a center cutting four flute if you see fit. Perhaps even carbide using a super abrasive wheel. Carbide end mills really pay for the home shop guy to resharpen. Thanks.
Thanks, glad you enjoyed it.
Four flute centre cutting geometries vary, some look ok to sharpen as theyre similar to the 2 flute in the video, and some have little details that I've no idea how I'd sharpen.
As for carbide, I have one 16mm which needs a lot of work. Whats stopping me is my current lack of dust extraction on my TC grinder. It's a project in the queue and when its sorted, I'll do the carbide mill.
Very well explained. I've just also watched your helical cutting video. Both were exceptional....brilliant!
Thank you very much!
muy buen complemento gracias
Thank you!
Excellent video,Sr.Thank you.
Thank you, and thanks for watching!
Recently found your channel and loving the content. Do have a question, though. I understand why you didn't angle the 40 deg relief cut. I agree it would retreat and eventually be none center cutting. However is it truly center cutting now with what looks like 1/2 of each flute being a 90 deg plowing into the work?
As someone who is rebuilding a rusted solid Quorn this is bang on time.
I have one question, did you "dish" the end flutes when you reground them by the customary degree or two?
Glad its useful. I thought I'd shown and explained in the video that the fixture was rotated a degree to make the corners proud of the centre. Don't think that footage ended up in the recycle bin!
@@ThePottingShedWorkshop I could have missed it.
@@chrisstephens6673 The part where Robert explained rotating the fixture ~one degree *is* in this video, but I don't remember the time stamp.
Just watched both videos. It looked very complicated and involved. So once you're stuck into a few, and in a rhythm , how long to do a two flute cutter?
Setup is the time consuming part. Once everything is up and running 5 to 10 minutes to clean up the flutes as long as theyre not too bad (ie. not badly chipped, just dull). Cleaning up the ends would take a similar time, unless you're grinding it right back and starting again on the geometry. Thanks for watching!
Good video. What do you call the fixture that holds the ER32 Collet and mounts to the table? I would like to buy one. I think with one of those I can use my surface grinder to sharpen end mill flutes.
I think a universal head is one of the names for the fixture that carries the bore. I agree that a surface grinder should be capable of doing the grinding. I often use mine in preference to the TC grinder for several grinding operations when its more convenient, or when the increased rigidity of the SG makes a better job of it. There isnt to my mind much difference between the two machines. The SG usually has a mag chuck on the table, ground flat in situ, which makes it unattractive to remove to fit alternative fixtures.
@@ThePottingShedWorkshop I had a design for one years ago, but never got around to making one. In fact the plans may have been from a book by a guy last name Hall. Thanks for your reply.