Feeling a little restricted.

[addjunkie]

By tool bars do you mean bits of hss tool steel you make tools out of. If so they will be surface ground. Just visit ebay and buy some 8 mm or 10. Its cheap enough.

 

[Richard.]

You're machining HSS? Bloody fair play if you can manage that on a vertical slide. Must be hell on the cutters.

I'm trying to.
It's not going very well.
Managed 1 out of 4 and yes the poor cutter has suffered because of it. Need a fellow member to finish the job cos if I keep going I fear I'm gonna end up with 10mm of back lash.

 

[Richard.]

By tool bars do you mean bits of hss tool steel you make tools out of. If so they will be surface ground. Just visit ebay and buy some 8 mm or 10. Its cheap enough.

I don't think they are hss I'm not sure. They are the tool bars that hold the inserts. Matt very kindly gave me them.

 

[Richard.]

Not even 1. This is the progress so far. Still 0.5mm to come off the whole thing.

 

[addjunkie]

Try one in a 4 jaw chuck, to prove if its the metal or your set up. They will be hard, but have been machined already to take the tip. but will i suspect have been heat treated in some way.

Are you using coolant, there looks to be signs of over heating.

 

[Richard.]

Try one in a 4 jaw chuck, to prove if its the metal or your set up. They will be hard, but have been machined already to take the tip. but will i suspect have been heat treated in some way.

Are you using coolant, there looks to be signs of over heating.

Cutting oil . I have coolant too for the band saw.

 

[Gritineye]

You'll have to buy a shaper for that, you know it makes sense..

 

[Richard.]

It's bad lighting on the photo
The metal is bright and the bar/tool was only warm. Easily handle them with bear hands.

 

[Pete.]

Crazy idea time but why don't you just mill 2mm off the holders.

 

[Richard.]

Crazy idea time but why don't you just mill 2mm off the holders.

Id rather mess up a bar than the holder. The holder is a hard steel too could be hss. They look to be a high quality one, not chancing it with those. (Thought of doing that before I started)

 

[phm87]

I don`t see the problem putting them in a four jaw chuck, or am I missing something? (not for the first time!)

 

[MattH]

You need to cut those with carbide insert tooling, you'll never get through them with HSS.

In your position I'd still grind them.

 

[Richard.]

You need to cut those with carbide insert tooling, you'll never get through them with HSS.

In your position I'd still grind them.

I don't want to grind them completely but what I think might be achievable is grind 80% of it off then a skim over so they sit flat.

 

[Kram]

Are you climb milling? that will give the vibration you describe.

Feed the work up into the cutter for the width of cut then feed the work towards you, that will be conventional milling. You want carbide cutter for doing this, and for milling a face its much better to use a fly cutter or turn it in 4 jaw.

 

[Richard.]

Are you climb milling? that will give the vibration you describe. I''d also look at how the slide is mounted. It should really be pinned to the cross slide - doesnt matter how tight its bolted they will still let it move about.

Feed the work up into the cutter for the width of cut then feed the work towards you, that will be conventional milling. You want carbide cutter for doing this, and for milling a face its much better to use a fly cutter or turn it in 4 jaw.

I don't have a fly cutter. Will look at 4 jaw though thanks.

 

[Richard.]

Bloody hell. Either that's a fluke or ........................ Na it's Gotta be a fluke.
I think that's near enough for farm work.

 

[addjunkie]

So did you mill it, or 4 jaw chuck in the end?

You can make a fly cutter fairly easily, however they are cheap as chips to buy!

I suspect you are now full hooked to the expensive addiction of machine tools.

 

[Richard.]

Well I sort of took matts advice and run it across the bench grinder till it was a rough .5 MM over size. Then I flushed it off and took it down with the mill. I did it slowly in 0.15 MM cuts and cutting oil. Perhaps I was expecting too little before I bought the lathe. But it's just so accurate. I thought I'd be struggling with it but if I turn the handle an amount on the scale it cuts that amount on the metal. I struggled to start because of how hard it was but I'm learning to get around it.

 

[addjunkie]

Most model maker machines dont get much use, and even less abuse, thats partly why they hold their price so well.

 

[Richard.]

Most model maker machines dont get much use, and even less abuse, thats partly why they hold their price so well.

Well after it's done 4 of these bad boys it might be due a strip down. In fairness my cutting technique was all wrong which wasn't helping. I had to take tiny cuts, fast rotation and slow feed to get the vibration out. It's strange I've worked with metals for nearly 20 years in the form of bending cutting and welding yet I'm back to square 1 with it all again. I love it.