Experimental Study on the Dynamic Performance of a New High-Speed Spindle Supported by Water-Lubricated Hybrid Bearings

Figure 7

Orbits of the front bearing with an attached unbalance mass m1 = 1.7 g.

(a) 9000 rpm

(b) 12000 rpm

(c) 15000 rpm

(d) 18000 rpm

(e) 21000 rpm

(f) 24000 rpm