MKll Radius Ball Turner - Final! 

I think you resolved several issues and you did it logically. I like your thought process. The general gist was you adapted a common machine tool accessory to do a job that I have found to be difficult. Congratulations ! I'll never forget this !

Well, it looks like you have finally reached your goal with the ball turner. Congratulations, you stuck with it and now you have a nice tool to add to your tool box. Nice job and thanks for sharing it with all of us.

Success at last! I knew you would work out all the kinks. Thanks for the video.

Glad you had the tenacity to keep with this and now we all have the information to create a great ball turning tool. Well done, one would assume you could take this same approach and use a bigger boring head also...

top job there chris, I thought it turned out very good and thanks heaps for the great episodes on the ball turner, now I need to make one for myself.. thanks again

As I always tell my students, these experimental jobs always look like a failure in the early stages, the secret of success is to keep going through that stage, and end up with workable project, as you have! Chris B.

I just found you this morning, and subscribed after the first one (chuck plate). I DID watch this to the end, and enjoyed every minute of it. Thanks for doing what you're doing, and sharing it with the rest of the world. BCNU, Mark in Modesto (CA)

Nice demonstration. I always fascinated in alternative ways of making things and how we deal with the problem encounter downstream, this is one excellent example. In the video, I can see a continuous chip yielding of long helical shape after reconstruction of tool holding and its regrinded for no chattering, compare to discrete chips when chattering occur with original tip shape. That long helical chip could be a tell tale sign that cutting-surface has increased from a lesser compound angle in relation to the stock material travel direction, therefore stressing the tool-fixture from one stress vector state to another where flex and free-play stability are at optimal, minimum.

Looks like you got it figured out.... Nice work, enjoyed the video....

Looks pretty darn good!

Hi Chris You could try setting the tool in the middle of the slug at the top. I measure the slug and make a mark dead center of the slug then set the swing. My ball turner cuts from front to back but same principle. You will always loose some of the diameter and with a nub at the threaded rod. I use a pointed lathe tool to machine down to the rod and hand finish the rest. Now I just leave a small flat nub turned down to the diameter of the shaft I and I put the ball on the shaft and wack it in the chuck and blend it together. I have brass balls on all the levers on my lathe probably have the most expensive lathe levers around. Happy Balls to you Dave

Nice job of making the ball turner It's about as good as I've seen around the tube thanks for sharing

Well done, I believe you had good result from the looks of it. As a side note I was watching you adjust the adjustment screw and noticed if there had been a slot on the other end of the screw it might have been easier for adjustments going from the other end just a thought.. Thanks for sharing your journey.

Well done the ball turning. Good Video. Cheers

The new tool holder certainly made a big difference.

nice work! thanks for sharing. you made a extremely useful tool.

Set the blank up in the chuck, move the cross slide to bring the tool tip even with the centerline (remember this setting); adjust the boring head slide inward (rotated to its highest point) to bring the tool-tip just touching the radius of the blank; pull back the cross slide and rotate the boring head 90˚ to face the end of the blank; advance the cross slide to center the tool tip again; now advance the carriage until the tool tip just touches the face of the blank; this should position the carriage (and boring head axis) perfectly on the blank. Now retract the boring head slide (not the cross slide) until the tool tip just clears the corners of the blank and begin cutting. This will form a ball of full blank diameter, which will complete the end away from the chuck perfectly with no waste. Good for putting a hemisphere on the end of a rod without changing the length, as well.

Jaw dropping amazing , I think it's a job well done .

Thanks for the explanation, much appreciated.

Those are some good looking chips.

oh~ great Method of cutting ball I'm Very Thank you May god bless you~

excellent job Chris...and yes i still think it can be further improved by making the relief below the cutting edge steeper...meaning less relief ....but IMO you got it looking good ...IMO i still prefer a machined finish looks richer to me :)

Hello Chris, your balls are getting somewhere... Nice improvement on the method, maybe a way to get closer from the 3/8 holding screw would be to grind off the side part of the tool that don't get to be used, this would let you turn closer from the center without side effect. Yep.... I stayed until the end.... Pierre

I don't mind watching the turning or long videos, then we don't have to keep clicking the next video to watch every couple of minutes. Thanks ChrisB257, I quite enjoy your videos and please watch your health cause we need your entertainment so much :-)

good tool, nice design but perhaps the cure to the chattering is to use this tool as a finishing tool only and use another tool to create two tapers, one on each side of the balls center line.This would eliminate the edge transitions where the chatter occurred and give the tool its use in its happiest area of cutting, and give the job it's best finish.

Really it's great work

Good job chris well done. would grinding the tip with a square end finish the ball at the thread

Good job chris well done :)

I liked the way you kept at it Chris I watched it all, why not cut a slot on the back adjustment screw for a screwdriver make life easier.lol

Thank you for the wonderful videos. I made a ball turner tool holder to accommodate a boring bar head. The holder is made of steel and seems to be very study but I can not understand how to make the cutter. Would you make a video on how to make the cutting tool or a drawing of the cutter geometry. Thanks again, REA

Very interesting way of turning a ball without the use of a computer. I've seen this done on a milling machine setup with an dividing head and a boring head. I have a challenge for you. :) see if you can turn a fair size concave radius. Not really a challenge for you I suspect than more of a show us how you would do it.. Good luck anyways.

Is that a combination tool holder-knurler? That's OG as hell.

Nice to learn from you, thanks... :)

Very good Chris, I think you have finally cracked it. I am finding the grind really hard to see looks almost square cut. could you perhaps do a closeup against a piece of white card or paper. Also on some of your other videos it doesn't sound quite right hearing aloominum with an English accent. ;-)

Hello Chris, I have been looking at making a ball turning device until I saw your idea which I wish I had thought of. Just one thought though, what would happen if you set the radius of the ball on the boring head, then approached the ball by moving the cross slide in slowly, would this save the constant head adjustment?

Great video, and very interesting watching the series as your ideas develop. From a theoretical point of view, would the ideal tool to cut a ball not form a tangent to the circle?

Good job!! Thanx

@10.52. The hex key difficulty., and also fairly close to the rotating chuck. I have just pulled the boring head apart and rotated the slidy tool holder bit, so that the cutting tool is now at the end where the adjusting hex is. When you pull it apart, you will see that you need to grind a groove, 15 minutes with mr Dremel. The adjusty bit is now very accessible. I only cut the one groove. No great precision engineering is required, as this is only an adjustment bit as the gib keys should be tight enough to locate when and where it is adusted to. Just wish I had done it years ago.

i watch alot of your uploads and keep forgetting to like and comment. just out of interest how did you get your cutting edge on center of the blank and indeed was it on cntr or bellow as it were?

I work inside a machine shop and would love to make my own weighted shift knob. however we do not have a radius cutter.

I watched the whole thing. What do I win? ;)

A fine idea thanks!

there is one big problem with this type of radius tool everytime you adjust it you are changing the diameter of the ball. you need a tool that cuts on the horizontal plane to maintain the same diameter throughout the wheel cutting process

So i was afraid you gonna hit your knuckles everytime you adjusted.. so.. cut on the underside of the workpiece and run the lathe backwards instead? then you would be able to adjust the head from above instead or your right.. without risking crushing a knuckle.

Hi Chris, I think if you tap the hole in the ball to be only 90% of the way so it gets tight at both ends you chatter may be cured easy fix for another try........ :o) O,,,

Where is the handle for operating please show it

It looks like an Almond.

Muito bom parabens, vou fazer um tambem mas vou ultilizar uma frasadora pra usinar a esfera.

Brilliant demo however the ball cutting tool did not impress me, the cutting tip flexed ever time it cut into the material no wonder you were have problems with chatter. I think the other type of cutter is more stable as the pressure is all going into the tool holder. But thanks for the demonstration she showed how by altering the cut angle you can improve matters. Much appreciated.

4 start thread in one time

How to do threadings 4 start in one time can u help

salut .super votre vidéo. dommage pas en francais du Nord de Paris. Cordialement. Dominique

i like you video th@nks

İHTİYAR YÜZÜKLE ÇALIŞMA 💍 SAKIN!!!!!

Look at the radius of your work and the angle of your tool. You have no undercut for your tool.