03-04-2015, 03:22 PM
The tool is this one, Although it is for four inserts I only use two.
The steel is 100 x 16mm (flat bar) hot rolled steel. The only problem with hot rolled steel is the side edges tend to be "rounded" hence the milling operation to make them flat and square. Cold rolled would have been nice ............... didn't have any
I just think at 1200 rpm it doesn't gets hot enough to cause the micro cracks. Also using the cutting oil from the start helps from the point of thermal shock.
Looking at the inserts above they were pretty worn out. I did change them.
DaveH
The steel is 100 x 16mm (flat bar) hot rolled steel. The only problem with hot rolled steel is the side edges tend to be "rounded" hence the milling operation to make them flat and square. Cold rolled would have been nice ............... didn't have any
I just think at 1200 rpm it doesn't gets hot enough to cause the micro cracks. Also using the cutting oil from the start helps from the point of thermal shock.
Looking at the inserts above they were pretty worn out. I did change them.
DaveH