Product review (5 stars): Maytag SDE305DAYW Dryer Maintenance
Like the person who answered a question, I too have a Maytag SDE305DAYW dryer. All the parts were correct in on package with a Whirlpool logo  are OEM. Whirlpool owns Amana, Maytag and others. If you can get the dryer about a foot off the floor it will reduce the gymnastics to release the belt from the idler wheel and reinstall it. I had to lay on the floor, reach into the small opening above the blower with my right arm and the other side with my left. It is mostly a spatial remember and feel operation.
The bottom line on the repair is this. These are not bearings in any sense. These are steel bushings cast inside the plastic rollers and pulley. The steel drum rollers and idler pulley slide onto bare steel shafts. I suppose the engineer determined that the unlubricated bushing to shaft was fine for the load and rpm. However, many of these dryers are installed in garages.and all in less than a sanitary environment. When I pulled my parts, they were fine. Dust and fine lint had accumulated in the drum rollers were one wasn't fully free wheeling with a light drag. The idler pulley was even dirtier to the point that it wouldn't freewheel at all but it would rotate. The added friction in the idler pulley caused the belt to slip which caused a lot of screeching and banging as the belt flexed. Once I cleaned the shafts and the bushings there wasn't any pitting or scarring and they worked fine. I did replace the belt because it was burning around the drum adding fine black dust to the equation. Two other items I recommend are there are two flat fiber strips that that fit as thin pads on the bulkhead to cushion the front bottom edge of the drum. These do wear through in time and this is the time to replace them.
At 6'4" and seventy years old it took me two hours including referring to the service manual and YouTube. It isn't a complex or difficult repair unless you don't like contorting on the floor. Half of the time I spent was finding a way to reach things.  I intend to add this exercise to my list of things I have to service to avoid the crisis that an appliance malfunction can cause in the household. Now that I understand it I believe I can do the entire job in less than thirty minutes and merely clean bearings/shafts,check the belt and wear pads.  A 5/16 nut driver and snap ring pliers are about all the tools you need. For those not familiar with them I have a large GearWrench 3151 snap ring pliers that have levers to change for inside to outside operation. These are made in the USA, came with additional tips to fit different snap rings and have served me well.