English to Spanish Tech/Engineering Mechanics / Mech Engineering

Hi! I'm translating a video on how to grease slow-speed bearings. Can anyone suggest a translation for "return roller bearing"?

Here's the context:

01:06:45:05 01:06:47:14
A slow-speed bearing
is any bearing operating

01:06:47:15 01:06:49:27
less than 250 rpm.

01:06:49:28 01:06:52:23
Typically, this includes
bucket elevators,

01:06:52:24 01:06:55:16
shaft bearings,
return roller bearings,

01:06:55:17 01:06:59:17
belt and drag conveyor shaft bearings,
etcetera.
..................................

Thanks in advance!

Mirela