Waring Pro MBB Blender- blade too tight

If you can get the shaft out of its bearing, you can clean the shaft with steel wool. You may also have to scrape the inside of the bearing with a small rat-tail file.
Put some vegetable oil on the shaft and reassemble.

DO NOT USE WD-40 OR 3-IN-1 OIL! This mechanism will be in contact with food/beverages, so you want a lubricant that is safe for human consumption.

If the problem continues to occur, I would buy a replacement. In some models, this means buying a whole pitcher assembly.

I was just able to fix mine. You'll need the following: two wrenches (almost any type), steel wool, and vegetable oil.

1. Clamp the hexagonal nut inside the bottom of the pitcher with one wrench and place the jaws of the other wrench between the "spokes" of the wheel at the outside bottom of the pitcher.
2. Turn either counter-clockwise until the hex nut comes off. At this point, you should be able to pull the bottom piece out from the bottom. Pay attention to the order and orientation of the parts inside the pitcher as they may fall out now.
3. Dry off the shaft and rub it with some ordinary steel wool (think SOS pads).
4. Twist a small amount of the steel wool and run it back and forth through the hole the shaft goes through.
5. Wipe both clean with a clean cloth or napkin.
6. Rub a little vegetable oil on the shaft.
7. Place the shaft back in the hole and test the movement. It should be like new again.
8. Reassemble the blender.

Hope this helps,

John