Making an ISO-30 Taper Slitting Saw Arbor

Jon, there is NOT bow to the saws, it is hollow ground for clearance. Did you relieve the corner on the arbour, as your tipped turning tool will leave a radius, and those saws will have a razor sharp edge to the bore. Great outcome. Regards from Australia.

Morning Jon. From a chunk of rust to a beautiful looking slitting saw arbor. Definitely no greater pleasure than making your own tools. Loved watching the mill turned into a lathe. 👏👏👍😀

Cracking build, Jon. About the only thing I could possibly suggest would have been cutting the dog slots prior to doing the finish turning op of the 25.4 register on the mill, that way you could ensure concentricity with a known, fixed rotation of the arbor in the spindle (although that would mean making some dogs too, hah).

Hi Jon. That was a good build. I am sure to buy something like that would not be cheap. There are so many youtubers you see with the slitting saw running out of true & only a small amount of teeth actually getting engaged to the material. Regards. Steve.

Jon, this is the VERY first video I watched on Your channel. I do quite a lot of manual machining myself and, actually, a slitting saw arbour was one of my projects. In my case the material was a power shaft from a lorry. Very tough material which had to be annealed in order to tap the threads to it. Metamorphosing a milling machine into a lathe is how You make accurate tool holders. There is a catch though. That arbour can be attached in two positions into the milling machine spindle. I have marked the nose of my milling machine for tools just like this. The tool, of course, needs to be marked as well. The method You used for setting the top slide angle is heavily dependant on the tool height. The measuring tool (dial indicator) needs to be exactly at the same height as the blade You are using to cut the taper. Usually they are both at the center height. For known tapers I almost always use a sine bar to set the angle. Your lathe seems to have a suitable cross slide for that type of set up. It is a lot faster and accurate method, However, it requires some trigonometry to pull through. I show this method on my video (How to machine a SK30 (DIN2080) holder for slitting saws).

Thoroughly enjoyed that Jon. I made one a few years ago because I had to make some slitted nuts for my Harrison Mill. Not as good as yours though, I just made it fit in a collet. I chose to go without a key as if the saw jammed I reasoned that it was better to allow it to slip rather than break or damage the part I was making. I was going to use a ball as a key, had I keyed them. I really enjoyed this film, especially the finish turning of the arbor in the Mill. Great stuff as always, thanks.

Nicely done, Jon, you make it look easy. 👍 By the way, I’ve managed to get all the way to retirement without needing a shaper. Then all these influential people corrupted me. I had one follow me home yesterday. There’s lots of candidates, but because of that recent, splendid completion of the Acorn I choose to blame you entirely for steering me away. Oh, and Rusti too. 😊

Interesting use of a vertical mill as a lathe.

Nice design and work on the arbor Jon. This is something that I will need to make at some point. I have a lot of saws, but no arbor for them. Thanks for sharing.

Steve Lang at solid rock does all this turning on the mill , Dave from Australia keeps you on your toes. Kit from Down Under

I thoroughly enjoyed that Jon especially trueing up the arbor on the mill..Thanks

Fantastic build, Great Job!

Hi John, I'm an elderly newbie. I just got presented with your channel. This tool would be useful for me as I too have an ISO 30 spindle. I can think of another consideration for not keying though. The last thing I want is to be near an exploding saw blade regardless of the guarding. I'd rather have to remake the arbor. It's a small point though, first I'd need to turn an accurate ISO 30 taper......

All good stuff Mr Jon, nothing better than making your own tools, you have the satisfaction of knowing you are saving money and improving your skills into the bargain, I’m in the process of making T2 tool holders, went back to see how you did it . Nice one Jon 👴🏻👍

great job. you've given me lots of good ideas in it in a good starting point on my next project. thanks for sharing

Hi Jon You could just turn a "washer" to allow the end cap fit concentrically on the smaller register.

Excellent video. Thanks very much!

Gday Jon, the arbor turned out spot on, great idea have the ability to use 2 different size bores, great job mate, cheers

Some fine machining Jon, real quality workmanship. Well done. Cheers Nobby

Very interesting Jon. Before too long I will need to turn a 40int arbour down to 30int so this has been instructive. Cheers