High precision cutters revamped

We have released a major upgrade of all its Pramet SWN04 cutter bodies. All SWN04 cutters are now blackened instead of nickelized, reducing tolerances of insert clamping and indexing. 

Also, modular tools have a newly designed clamping cylinder, which has a very steep cone with a natural self-centering capability. Both upgrades result in high precision clamping and reduced radial run-out to almost zero, while remaining compatible with common holders.