Bump-mapped speculator does not work and displacement if units mm

Bump-mapped speculator does not work and displacement if units mm
It does not work well on small objects and does not work at large objects at all.
color map ok
plz help

test.blend
https://drive.google.com/open?id=1r1VOp-CLupViEQY7sZ0xjJuj1cDAsErt