Cutting/drilling hardox

[F.J.]

Morning all, wasn't sure which section to put this so mods feel free to move it.

Going off my shears repair post last night I have to weld a foot on the bottom of them from Hardox approx. 360x180 with 2 holes in to enable the bottom tooth's pins to be knocked out when being replaced. I have the Hardox left over from a bucket refurb I did but wonder which would be the best method to drill/cut/burn the two holes in it. The holes need to be about 25-30mm, would a mag drill do this? The Hardox is 50mm thick.

Any other suggestions will be welcomed.

Thanks
F.J.

 

[wyn]

I use tungsten carbide tipped rotabroach cutters for hardox 450-500.

A steady speed and plenty of cutting fluid and they go through easily.

 

[wookie]

A steady speed and plenty of cutting fluid and they go through easily.

Slow & steady and don't skimp on the cutting fluid, that's what I do when replacing the cutting edge on a bucket and need to drill holes for the bolt on teeth.

 

[TechnicAl]

http://www.ssab.com/Support/Processing

 

[Kent]

armour piercing round from a 30 cal ?

 

[penfold]

What they said; it drills fine with a sharp cutting edge, lots of coolant and the right speed. The only time I've ever had trouble with Hardox was some that had been flame-cut and not heat treated afterwards, the edges and the kerf were like kryptonite.

 

[F.J.]

Thanks chaps, a trip to Cromwells first thing monday it is then