Tianjin Zhan Zhi Investment Corporation Limited founded in 2008. It is a branch of Shanghai Zhanzhi Industry Group Co.,Ltd., it is founded in early 1990s,located in Shanghai Yangpu District, is a large-scale comprehensive enterprise group, combining steel trade, processing and distribution of steel, steel raw materials, real estate development, financial investment and other industries. The registered capital is 200 million RMB.
Cutting 20ga SS with a ShopBot and Makita RF1100 var. speed router.
Air was used for cooling.
3/32 tin coated (4) flute endmill
I did 16ga, but it took two passes.
I did not think this was possible.