CNC Plasma Table

[f350ca]

Made the rollers for the gantry and whatever the other part is called and the up and down for the torch. Used mystery metal again, its some sort of stainless, was the polish rod on a sour oil well, so had to be strong and wear resistant and in this case corrosion resistant. Sure tough stuff to cut, eats carbide, but surprisingly HSS stands up fairly well.

Used soft jaws (first time) to hold the blanks while I faced and bored for the bearing pocket. That insert boring bar was a joke, this stuff ate that carbide, ended up grinding a broken carbide end mill and using it.



Then made a mandrel that fit the bearing bore and held the blanks on with a cap screw. Used a parting tool to grove the centre. HSS stood up at 200 rpm on 1 1/4 dia.



Swung the compound to 45 deg and cut one side at a time. Took all 6 cutting surfaces of that insert to do 13 wheels at 400 rpm faster was worse.



Far too much like production work for my ADD.



One with the bearings pressed in, used skate board bearings, cheep and easy to get.