Thanhtung.
Try this for working with Copper.
Mike-O-Cut #87 Cutting Fluid
Makes working with Copper like working with Aluminum, Just GREAT !try it !
I really hated working with CU....NOW....All good....tapping 4mm hole....still go slow....but....NO SNAPPED TAPS !!!!!
Good Luck !!! Also....beautiful hosts.
Bob CDBEAM
Try this for working with Copper.
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tstool.com
Makes working with Copper like working with Aluminum, Just GREAT !try it !
I really hated working with CU....NOW....All good....tapping 4mm hole....still go slow....but....NO SNAPPED TAPS !!!!!
Good Luck !!! Also....beautiful hosts.
Bob CDBEAM