“FD Grip” The No.1 earthquake-resistant rebar coupler in Japan, the highest seismic country, for over 30 years.
https://www.fujibolt.com
Late Night Lathe Work… Watch the washer like object I made while making this motor axle for a motorized rack and pinion.
Yes its spinning on a high precision lathe… Yes its case hardened steel… yes I realize I maimed the shaft accidentally with a dull bit by letting it do passes automated and looking away for a second…