Just got my 1216 about a month ago. Initially they bearings get hot until they break in. Mine would get to 115 deg within a few minutes without any load on em. Got about 10 hours of run time on it and the heat issue resolved itself. However they still make noise like one of them is bad. If they dont replace it under warranty soon im just going to order a set . I think the company you can order from is cxb, and they run about $12 a set. I upgraded from a delta 46-250
Sent from my SAMSUNG-SM-G935A using Tapatalk