CANNOT GET THE FLAT BEATER TO ATTACH TO MIXER...OTHER BEATERS ATTACH EASILY. iT IS LIKE THE HOLE IS NOT BIG ENOUGH OR SOMETHING...NEW MIXER

I do not think it matters the plastic disc may be to keep beater fro mixing bowel. i would try it and see what happens, you could switch holes after trying it.

I can't find a manual for the MX55 online, Suzanne, but looking at the picture of it I found on Amazon and based on the manuals for other B&D models, it looks like you should have two slightly different beaters: one with a collar and one without and it's very important that each beater go into the correct hole. The one with the collar should go into the left hole (looking at the bottom with the holes at the top) and the one without a collar into the right. The other manuals say "insert each beater and, if necessary, turn it slightly until it locks into place." I hope this helps. Good luck!

I searched for replacement beaters for Blacker & Decker SM-100 type 1 (SM100) electric stand mixer for years. I found the Sunbeam Mixmaster Mixer Replacement Beaters for stand mixers, item 4955, at a large Ace hardware store. They were priced over $16.00, so you may consider buying a new stand mixer. The beaters are the correct length, snap in and grip correctly even though the ends are curved like a half ball rather than flat as the originals. The beaters turns well but I haven't tested them with the bowl because I need to find the turn table that I have in storage. The beater set was design ed to replace parts for Sunbeam stand models 2355-1, 2356-1 and 2360-2.

Make sure your Beater can slip in and out of the Beater Shaft
easily. Do not force the beater onto the Shaft if the shaft is bent.
If it cannot be removed easily by hand, use a soft rubber mallet
(not a steel hammer) to slightly tap the beater so it can be moved
up and down the shaft or from side to side. Then you can easily
turn the beater left and remove it from the shaft.

From Kitchenaid Manual:
To Attach Flat Beater, Wire Whip, or Dough Hook
1. Turn speed control to OFF.
2. Unplug stand mixer or disconnect power.
3. Tilt motor head back.
4. Slip beater onto beater shaft and press upward
as far as possible.
5. Turn beater to right, hooking beater over pin on shaft.
6. Plug into a grounded 3 prong outlet.

To Remove Flat Beater, Wire Whip or Dough Hook
1. Turn speed control to OFF.
2. Unplug stand mixer or disconnect power.
3. Tilt motor head back.
4. Press beater upward as far as possible and turn left.
5. Pull beater from beater shaft

Make sure your Beater can slip in and out of the Beater Shaft

easily. Do not force the beater onto the Shaft if the shaft is bent.

If it cannot be removed easily by hand, use a soft rubber mallet

(not a steel hammer) to slightly tap the beater so it can be moved

up and down the shaft or from side to side. Then you can easily

turn the beater left and remove it from the shaft.

From Kitchenaid Manual:

To Attach Flat Beater, Wire Whip, or Dough Hook

1. Turn speed control to OFF.

2. Unplug stand mixer or disconnect power.

3. Tilt motor head back.

4. Slip beater onto beater shaft and press upward

as far as possible.

5. Turn beater to right, hooking beater over pin on shaft.

6. Plug into a grounded 3 prong outlet.

To Remove Flat Beater, Wire Whip or Dough Hook

1. Turn speed control to OFF.

2. Unplug stand mixer or disconnect power.

3. Tilt motor head back.

4. Press beater upward as far as possible and turn left.
5. Pull beater from beater shaft.

Make sure your Beater can slip in and out of the Beater Shaft
easily. Do not force the beater onto the Shaft if the shaft is bent.
If it cannot be removed easily by hand, use a soft rubber mallet
(not a steel hammer) to slightly tap the beater so it can be moved
up and down the shaft or from side to side. Then you can easily
turn the beater left and remove it from the shaft.

From Kitchenaid Manual:
To Attach Flat Beater, Wire Whip, or Dough Hook
1. Turn speed control to OFF.
2. Unplug stand mixer or disconnect power.
3. Tilt motor head back.
4. Slip beater onto beater shaft and press upward
as far as possible.
5. Turn beater to right, hooking beater over pin on shaft.
6. Plug into a grounded 3 prong outlet.

To Remove Flat Beater, Wire Whip or Dough Hook
1. Turn speed control to OFF.
2. Unplug stand mixer or disconnect power.
3. Tilt motor head back.
4. Press beater upward as far as possible and turn left.
5. Pull beater from beater shaft

1. Unplug stand mixer.
2. Place bowl lift handle in down position.
3. Attach flat beater.
4. Adjust so flat beater just clears bottom surface of bowl
when in lifted position by turning screw
(A) Counterclockwise to lower the bowl.
5. Just a slight turn 90 degrees in either direction.
Place bowl lift handle in up position to check clearance.
6. Repeat Steps 4 and 5 if necessary.
I hope I helped you.

oh yes you can.:) pur some wesson oil into the sockets the beaters go into and a little around the button.. Let set a few minutes and work the beaters back and forth as you pull gently. Make sure it is unplugged!!!!!

I bought an old GM mixer no. 30M47 with no beaters yesterday at the Salvation Army store. The beaters I have for a newish (ugly) GE hand held beater fit perfectly. I suggest taking your old beater to a store that sells new GE handheld beaters and seeing if the new beaters fit. If anyone reads this and wants me to look up the number of the new ugly beater for them, please say so before I take it to the Salvation Army.. : )

There are several possible causes:1. The blades of the beater/s may be distorted (bent) 2. The beaters are in the wrong way round 3. The bottom tray is not seated down properly - there may be something in the central hole 4. The bowl may be damaged