Ordered this blade for my 40 year old Osterizer Galaxie Pulse Matic. The internal shaft of my old blade was apparently so gunked up that my blender struggled to turn it and started smoking while I was making a smoothie. Thinking the motor was shot, I almost tossed the whole blender until I realized the motor spun fine without the blade attached. The new blade did the trick, and I've got a like-new 40 year old blender. The new blade isn't quite as hefty as the old one so it probably won't last another 40 years, but I probably won't either! 🙂