Which chuck to fit 6" rotary table??

[Jonathan]

Another issue is to produce a cutter to cut 3m hdt profile. I searched internet but it looks like the only option is to make cutter myself

That's what I did for XL pulleys ... but then that's only a trapezium.

Small ball nose cutter and several passes to get the right profile? Would take ages but if it's a one off why not?

P.S. I've got some 3m HTD pulleys if you're interested... I'll go and check what sizes.