What are you machining?

[Pete.]

Machined today a pair of steering relay housings for @badabec. These have to be bored out from 46 to 47mm to accept modern bearings but there's no easy way to hold them. There's a 48mm x 1.5 pitch thread in the end so I turned a thread in a piece of scrap and made it a close fit, then screwed the housing on to the thread and bored them out the 1mm required.

 

[Brad93]

Machined today a pair of steering relay housings for @badabec. These have to be bored out from 46 to 47mm to accept modern bearings but there's no easy way to hold them. There's a 48mm x 1.5 pitch thread in the end so I turned a thread in a piece of scrap and made it a close fit, then screwed the housing on to the thread and bored them out the 1mm required.

View attachment 292780

View attachment 292781

You didn’t need to grind them then?

 

[Guzrik]

Clocked the faces, CNC side is nicer but not too bad in any case.

I would expect you would have done this the other way around?
Make the attachment to the lathe first, fix it directly to the lathe and then machine the collet side?

 

[Hood]

I would expect you would have done this the other way around?
Make the attachment to the lathe first, fix it directly to the lathe and then machine the collet side?

It is for holding in a chuck rather than mounting on the spindle nose and will be used on both the CNC and the manual lathe and probably also in the mills..

 

[Brad93]

Will have to finish the shaft tomorrow afternoon. Spent too long looking for things I’d just seen today!

 

[Pete.]

You didn’t need to grind them then?

No I couldn't find any good way to hold them on the grinder. In the end the casting turned very nicely with no ringing or chatter.

 

[Brad93]

No I couldn't find any good way to hold them on the grinder. In the end the casting turned very nicely with no ringing or chatter.

That’s what I was worried about. Nicely done. Didn’t even consider holding it by the thread. M48x1.0 iirc

 

[Woody.v8]

Started to make a groove nut socket ,turned and bored out of a 90mm steel bar, milled the 3/4" square drive now I just have to work out the best way of milling 6 equally distance pegs into the face now.

 

[Agroshield]

You won't be milling the pegs. You will be milling the spaces between the pegs.

Wrap a piece of paper around the perimeter. Divide into six by folding. Transfer fold marks up to top surface. Join opposite ones. The top face will then have six lines on it. Use a pointy thing in the mill spindle and an eye ball to align one pair with the X-axis. Zero the Y-axis and step over half the peg width plus half the cutter width.

 

[Hood]

Other option is shove the a 3/4" bolt through the square, and lock it up solid with a nut and use the hex of the bolt head for indexing.

 

[northwest]

You won't be milling the pegs. You will be milling the spaces between the pegs.

Wrap a piece of paper around the perimeter. Divide into six by folding. Transfer fold marks up to top surface. Join opposite ones. The top face will then have six lines on it. Use a pointy thing in the mill spindle and an eye ball to align one pair with the X-axis. Zero the Y-axis and step over half the peg width plus half the cutter width.

Other option is shove the a 3/4" bolt through the square, and lock it up solid with a nut and use the hex of the bolt head for indexing.

These are both excellent practical answers.

 

[Agroshield]

Other option is shove the a 3/4" bolt through the square, and lock it up solid with a nut and use the hex of the bolt head for indexing.

That is rather good.

On the basis of standing on the shoulders of giants, if he has it, he could grip the socket adaptor shown to the right of the piece in an ER hex collet block and solidly stick the square into the hole.

 

[Woody.v8]

This is how I went about it in the end....

 

[Woody.v8]

I really need a cnc ,it's good practice though I suppose.

 

[Jan-DIY]

Just machining 30mm with oxycutter.
Got 5 axis in my right hand.
But I need to findright cuttingspeed.

 

[Johnnybravo]

Couple of tank wheels to skim. 625mm diameter looks lost in that lathe

 

[123hotchef]

Started to make a groove nut socket ,turned and bored out of a 90mm steel bar, milled the 3/4" square drive now I just have to work out the best way of milling 6 equally distance pegs into the face now.
View attachment 295165View attachment 295166

for tightening wheel bearings?

 

[Hood]

Couple of tank wheels to skim. 625mm diameter looks lost in that lathe

View attachment 297998

What is the swing over the bed on these? Just trying to get a handle on the size compared to my Computurn.

 

[Johnnybravo]

What is the swing over the bed on these? Just trying to get a handle on the size compared to my Computurn.

535mm over the bed
368mm over the cross slide
810mm in the gap
3050mm between centers

 

[Woody.v8]

for tightening wheel bearings?

No that one is for ram pins on my hiab
The one on the right is the wheel bearing socket.