Thread: Quick change tool post, advice please

https://toolsnz.com/

Fresh link?

Originally Posted by No.3

https://toolsnz.com/

Fresh link?

I can't find the tool holders on that website. Might look like I've already got a few, but honestly I'd like a few more.

https://www.aliexpress.com/item/1005...Cquery_from%3A

Now we are talking, this will turn off the masses haha. Aliexpress has all (if you can stomach it).

The toolholder you want is the 250-202 - this has the groove machined in the bottom of the toolholder's tool slot that allows you to use round boring bars in a standard tool holder as well as square shank tools.

Originally Posted by No.3

https://www.aliexpress.com/item/1005...Cquery_from%3A

Now we are talking, this will turn off the masses haha. Aliexpress has all (if you can stomach it).

The toolholder you want is the 250-202 - this has the groove machined in the bottom of the toolholder's tool slot that allows you to use round boring bars in a standard tool holder as well as square shank tools.

Aliexpress if you are particular with which supplier is basically the same quality stuff we buy here from Machinery House etc. anyway. I might grab a few of those.

Originally Posted by No.3

https://toolsnz.com/

Fresh link?

that works

Originally Posted by Makros

Aliexpress if you are particular with which supplier is basically the same quality stuff we buy here from Machinery House etc. anyway. I might grab a few of those.

So, @Makros and @No.3 are these tool holders the correct type for @Makros tool post that he has given me?

Originally Posted by 40mm

So, @Makros and @No.3 are these tool holders the correct type for @Makros tool post that he has given me?

Certainly looks like it to me.

I believe that any toolholder labelled 250-201, 250-202 etc will fit my 250-200 toolpost. The 250- prefix indicates the size, and the suffix indicates the type of toolholder.

If you look at the Toolsnz website up there he has the smaller set listed (the 250-100 sized toolholders) and the -101 is the standard turning/facing, the -102 is the turning/facing/boring toolholder on through the rest of the options.

I'm fairly sure all 250-20X series are compatible with each other, the only proviso I have in my head is there is a piston toolpost (what we are looking at on the Toolsnz website and what I and Makros have) and also 250-series wedge-type toolpost. I have not looked at or sized up one of the wedge toolposts in the wild - I have heard that the piston type are more secure and more rigid on lockup and I have stuck with that as my option. The wedge style lowers one side of the dovetail to lock the toolholder, whereas the piston type shoves the toolholder out and engages both dovetails equally. My view, the piston type is as solid as a rock... I 'think' that as both the wedge and piston type toolposts use the same numbered toolholders that they would be compatible, but I cannot confirm this as I've no experience of the wedge type out in the real world.

The holders I'd get for the 250-200 toolpost are the -202 turning/facing toolholder - flat bottom with the longways groove to allow you to use either square shank tools or round shank tools (if you are short a tool and need to get a job done you can set a 12mm drill bit in the toolholder and use it as a boring bar for example). It's the same as the standard -201 toolholder but with the lengthways groove so more versatile than the standard flat bottomed jobbie. The other I recommend is the parting off toolholder, I'd have to look what number that is. I also have a knurling tool but never used it for anything serious and I think a boring bar toolholder with a 1/2 and 3/4 hole in it. Never used that either... I use the standard turning/facing or the grooved bottom turning/facing toolholders all the time, and the parting off tool quite often as well.

The only other bit I would mention is I got given a Sandvik carbide turning tool with a good selection of tips in a 3/4 shank size. This is too big to fit into the recess in the standard -201 toolholder so with no experience of it we slapped the toolholder into a tiny hobby mill and proceeded to blunt a couple of milling bits while we learned about milling toolholders. It actually worked quite well in the end, so the toolholders are not very hard. You just have to just take shallow depth cuts and then drop the tool and take another pass. The problem we found was the tiny hobby mill was not rigid enough to take on a toolholder in one pass and the tool deflection was horrific!

thanks guys, very helpful so far.
I think I will order a couple tool holders as above.