ECN Forum Forums Technical Discussion Electrical Theory and Applications AC Motor Maintenance (3phase/1phase)

How long can a motor last? This is the original 400v 'Drouard' 5hp 3-phase 6 pole 900 rpm motor running my ancient bandsaw. Renovated a couple of years ago, this machine is in constant daily use. Built in Paris about 1931. I think you are supposed to re-grease the bearings on these old motors every 20,000 hours.