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Differences in Vintage Sunbeam Mixmaster Beaters

I get a lot of questions and see a lot of Mixmaster beater auctions on Ebay that suggest that this subject is pretty confusing, so I thought it might be helpful to explain the main differences in Mixmaster beaters used in the model 10, 11, and 12 vs those made for the later 1970's models like the MMA, MMB, 1-7A, 1-8B, etc.

These two beaters styles are the same size, and both have the Nylon drive button on the bottom of the rounded "bowl fit" (outboard) beater. Because they look nearly identical it's often assumed they'll interchange. And they'll fit both mixer model series, but...

In the photo below, note the location of the tiny retainer rings in the grooves of the beater shafts. Those tiny  spring steel rings may not look important, but they're responsible for making sure the beaters stay up in the spindles where they belong while mixing. They do that by engaging corresponding grooves up inside the mixer spindles, and their location is what's crucial. In order for the beaters to stay in place, they must be in the right position to drop into the grooves or the beaters will just fall out.

In the model 10, 11, and 12, these retainers are approx 5/32" above the collar on each beater. Later 70's models' grooves are 5/16" above the collars.

Just to confuse things, there were "universal" beaters made that have both sets of rings as shown on the right in the photo, and can be used with both mixer series. Those aren't too commonly seen these days, though.  


I hope that helps clear this subject up a bit.

Note: To get an idea what year your Mixmaster was manufactured, visit this page.

I hope that's of some help. As always, if you have any questions about your Mixmaster, please feel free to drop me an email any time.

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