What are you machining?

[Rrobson]

That’s a hefty cut to be doing on a turret mill. Light cuts are probably making it worse.
The way to decrease chatter is more feed, less speed. So bigger cuts, slower spindle speed, faster feed or a combination of all three. Unfortunately turret mills aren’t the most rigid.

More clampage will help stop a little chatter too and obviously stop it moving about.

 

[indy4x]

Is it aluminum?

Nope, came from a random lump of steel that my BIL brought home from work

 

[indy4x]

Can you make a centre pin to locate the hole, a couple of bits of aluminium against the sides and bolted in the T slots for location and the clamps to hold down in position.

Centre pin probably yes, addional side bracing unlikely as its tight on space the the current clamps

After it moved the 2nd time, I changed the orientation on the rotary table and its stayed put since

 

[indy4x]

Have you tried to use lots of lube/coolant to stop the chatter?

Yes, a little, dont have flood coolant as no space for the tray so squirty bottle it is

 

[indy4x]

Photo of the lump it was cut from and the 2nd one I haven't finished yet



Yes, i need 2 of them

 

[indy4x]

@Rrobson I did think it was asking a bit much of a turret mill, its a Warco so reasonably sturdy but nothing like old iron

 

[Paulbarrett]

@Rrobson I did think it was asking a bit much of a turret mill, its a Warco so reasonably sturdy but nothing like old iron

I think mine is pretty much the same model