Here's the nameplate from a 5 HP single phase electric motor - used in an air compressor:
Note that it reads:
HIGH TORQUE GREASE BEACON 325
which I interpret to mean that you should use high temperature grease of which "Beacon 325" is an example or recommended brand / product.
I'm familiar with electric motors which either have used permanently-lubricated sealed or shielded bearings, or alternatively bearings which required oil. But I haven't come across any which require periodic grease maintenance.
Although a permanently sealed bearing would of course have grease I'd be surprised if a motor was expected to be disassembled for regular grease service. And I don't see any grease fittings.
So what does this mean? What service is implied by the grease statement on the label? Could this refer to the motor application (air compressor) and not the motor itself? But it seems like a general purpose motor.