Trouble with HSS tool being destroyed by mild steel

[Dan Boy]

I have a custom made HSS tool from a piece of regular 10mm2. I have been careful to make sure the tool height is correct. It is a radius tool so there is not a sharp point to it yet when it comes into contact with the steel, the steel eats it away like it is made of plastic.

I'm sure I am doing something very basic here but I just can't see what is wrong.

Does anyone have any suggestions?

Thanks, Dan.

[Dan Boy]

Here's a pic of the broken tool steel.

[TomG]

Three possibilities: Your tool is not HSS, your work is not mild steel, or the cutting speed is way too high.

This would only make for a rough finish, but I don't see any side clearance on the tool. Check out the reference section on my website for proper clearance angles.

Tom

[Mayhem]

(06-18-2017, 04:26 PM)TomG Wrote: ...Check out the reference section on my website for proper clearance angles...

I thought those angles only related to oversize cutter made from wood

[TomG]

(06-19-2017, 06:13 AM)Mayhem Wrote: I thought those angles only related to oversize cutter made from wood

 

[Dr Stan]

(06-19-2017, 06:13 AM)Mayhem Wrote:

(06-18-2017, 04:26 PM)TomG Wrote: ...Check out the reference section on my website for proper clearance angles...

I thought those angles only related to oversize cutter made from wood

That only applies to the upside down part of the world.  

[wawoodman]

(06-19-2017, 10:31 AM)Dr Stan Wrote:

(06-19-2017, 06:13 AM)Mayhem Wrote:

(06-18-2017, 04:26 PM)TomG Wrote: ...Check out the reference section on my website for proper clearance angles...

I thought those angles only related to oversize cutter made from wood

That only applies to the upside down part of the world.  

But then the relief angle is on the wrong side.