Just wanted to say thank you! I have for a while been a hobbyist machinist but recently got a new job running a mill for my department. Im not familiar with large mills like this and my skills were primarily in design, laser and CNC. The company knew this when they hired me and have been supportive in me learning and getting comfortable with all this new stuff. This video was exactly the kind of explanation I needed. The work we do is highly experimental and most of the people who work there don’t have a clue about our machines so I’m trying to learn as much as I can as fast as I can be be useful. Again I very much appreciate your clear and concise explanations of everything.

Thank you, very much for this concise and informative presentation. You answered my questions about proper holding of a milling cutter with R8 collets within the first 2 minutes. It is SO helpful that you discuss WHY something works best. As a former Industrial Arts teacher, I find helping students understand the "why" is important to help them gain critical and forward thinking.

Outstanding!👍👍👍👍👍

Great video. Thank you.

Answered all my questions about collets in this video. Thank you.

Thank you for this very informative video. Level of instruction exactly matched what I needed as a slightly trained newbie.

Thank you for explaining that

The R8 is very popular for 1HP machines that Bridgeport designed. Most of the BP clones up to 5HP use the NT40, which is used all over the world.

Thank you for this video

Your content is great and your video length is perfect. Have you thought about a shop tour video? I would love to see that!

Interesting take on your handing of the R8's, we thank you. We use Hardinge R8 collets here, preference and accuracy for us. New to your channel, we subscribed and we enjoy seeing your efforts. Lance & Patrick.

Great video, im subscribed! For me, I like r8 to er collets. Been looking at the tormach tts too

really good info for a beginner like me

Thanks for an informative video. I would like to build a heavy, gantry milling machine, using the R8 system. My work envelope will be 10”-X, 10”-Y, and 6”-Z. 1/16” - 3/4” diameter collets will certainly work for me.

Thank you..

I wish I bought my mill with R8 spindle. They only had MT3 in stock and I was a bit impatient. Good series on tooling. Subscribed!

Hi really enjoyed this. I am going to an auction and the are offering a large set of collet pads. Not sure what the benefits are. I have a large selection of 16 c collects.

I've got a 1-1/8 r8 js. You can also hold 1-1/8 stock in a r8 collet block js.

Woah! Thanks a lot. I have a slightly larger mill (kao feng) but not as much travel vertically and a rather large vise. I was really nervous if I should go for the spring collet style or not. Thanks for the adviSe!

What a great explanation of the different holders and R8 things, I have a Clausing 8520 Mill, I know don't say it but works for me, like to get a face cutter like 1" to1 1/4" , but the machine has the collets that are MT 2 with a 3/8" threated end for the draw bar. Do you have any ideal of options for that. See they have spring collets, and holders in the MT 2 with 3/8" threated end, or would you suggest something else. I do have many of my collets for this machine but the issue is to find cutters for facing with a small shaft. Thanks , really enjoyed your explanation of all you did here.

Great video ! I have a 626 mill with a R8 spindle fitted with a ER32 collet holder. Been playing with the idea of getting a R8 20mm spring collet and leaving it in the mill. Then using SC20 straight collets on each of my end mills to speed up tool changes. I know using a collet inside another is not good practice but I only do very light work on aluminium. Have you ever tried this and do you think it's viable. Thanks Neil

Cool video, what tools have you used with that 1” R8 collet? I have done some machining at a student machine shop and the largest R8 collet is 7/8”. Only end mill I had for it was a long 7/8” end mill and it was not very rigid.

Hi, i lkike yoy vid. I want ask you, when you say "import ER collet" do you refer to some chinese ER-collet? i found some chinesse ER collet kit in good price and probably buy some chinesse er-collet for that, many thanks

thanks for the info. As far as using ER collets in an R8 shank, what is the proper R8 collet size that will accept ER collets? What is the min and max size ER collet you can adapt in what size R8 shank?

Hi, good vid/shop. I have dude, whit R8 toolholder when get out/in from the machine do you lost the Z hight tool?thanks

good info, can you show some examples of going higher or lower speed to reduce chatter?

Question: Would it be beneficial to grind/remove the indexing nub inside of of the spindle for R8 collects? As far as speeding up the change out...

Do you lubricate the taper on the spindle or the collet for the r8 or ER collets, or just leave them dry? Also, are the toolots (7:40) ER collet holders any higher quality than the other chinese ones?

Is it possible to true up a tool in a R8 collet? i've heard of this being done by tapping the tool but I've never witnessed anyone doing it.

I have a super important and urgent question I am cutting gears for the first time completely on my own I've done all the math I've got everything down perfect I believe in quotations Umm I'm using the R8 integral Shank like you showed here The thing is you have the potential to set the gear cutter at different height depending on how you arrange the spacers but it seems like there's always gonna be some spacers that are not aligned with a section of keyway it's just not long enough is there any right or wrong way to do this? I just for convenience moved it as close to the end of the alright holder is I could and that's really it I just don't know if there's a right or wrong way to do this if you could give me any insight it would be a big help

Great informative Video. I am new to machining and I am finding the whole topic of collets and arbours very confusing. I thought the R8 was the big guy with machines to match. It seems that the hobby home range use smaller tooling tapers. It doesn't help by having different codes for what looks like the same thing, for example Mt3 is the same as er 25 and R8 is a er32. As I don't own or have access to any collet holding machines that doesn't help.

Excellent video thank you. Where can I get good quality r8 tool holders in Europe (Ireland) looking for what you put in the machine at 10:26

Where did you get the tool in your hand at 7:41

What’s the make/model of those storage racks?

8:00 so what your saying is just use a 3/4 r8 and install er into it. no need for a set of r8 just a 3/4?

wish my r8 collets slid into my machine that easily....

Ok, I lied....I have one last question about R8 collets....what are the top 5 brands?

Where did the designation "R-8" come from? In other words, what do the "R" and the "8" mean? Thank you. Student Machinist

Lots of good information but the video editing to speed up your speech is not needed.