How to separate coupler

If you need a replacement motor coupler for your Ronson 8342 stick blender, there are a few options you can try:

1. Check with the manufacturer: Contact Ronson customer support and inquire about the availability of a replacement motor coupler for your specific model of stick blender. They may be able to provide you with a replacement part or direct you to a authorized distributor.
2. Check online retailers: Look for online retailers that sell parts for small appliances, such as Amazon or eBay. You may be able to find a replacement motor coupler for your Ronson stick blender.
3. Check with local appliance repair shops: Local appliance repair shops may carry the replacement parts you need or have the contacts to help you find them.

It's worth noting that finding replacement parts for old appliances can be difficult and that's why it's always better to check with the manufacturer first.
Also, you might want to have the model and serial number of your stick blender when reaching out to the manufacturer or other suppliers, as it will help them to identify the correct parts for your specific unit.

Lever it off with a screwdriver, it is aluminium and the threads on the ring will break away. Pick them out of the thread on the motor shaft and screw on a new coupling, it will be left hand thread.

The nylon coupling is either cracked or missing. A flat key extends from the motor shaft and locks into the extension like a paddle in order to move the blades. If you can not find the insert, this style of interlocking is common mechanical design. There are sometimes a spring clip the paddle interlocks with. The nylon insert locks into the blade rod mechanism. I suppose the nylon insert is designed as a replacement part rather than replace the entire blade extension

Assemble it with motor secure and base & feet on. Drill 3 or 4mm hole in edge of coupling Put screwdriver into hole on a large angle and whack the handle to undo the coupling. You are whacking it to turn in the same direction it turns when the motor is running.

Unplug it first and with a flat-head driver prise open the top between the flex and the top.

My coupler was split in two, and I couldn't screw it off. I had to do the following:
1. Take the blender apart (mine had 2 screws on the bottom). 2. Remove the motor housing from the blender (mine was loose from removing the two screws earlier). 3. Remove the fan by removing the fan nut. 4. Take apart the motor housing. Mine had two machine screws with 1/4" hex heads holding a bracket that tied the two ends together. Once those two screws are removed, you can take the motor out of the housing. Be careful on the fan end of the motor, because it's got two spring loaded brushes that will come together once the motor is pulled through. 6. Once you have the motor out of the housing, you'll have something to grab onto so you'll be able to unscrew the broken coupler. I used a pair of channel locks and gently grasped the motor body, and then just used a regular pair of pliers to grab the broken coupler. It's regular thread (lefty lucy righty tighty), so twist accordingly.
Once you have the coupler off, just put everything back together. The hardest part is holding apart the spring loaded brushes while you push the fan end of the motor shaft back through the motor housing.
Took me about 20 minutes to do everything.
Good luck.

Yes.

The coupler - the black cylindrical piece that juts up from the motor base, and it has 6 teeth protruding inward toward the center of it - is responsible for transferring motion from the motor into the blade assembly. You physically set your jar on top of it.

If you're needing a replacement coupler for your blender, you may order it and find repair instructions at the following link:

www.mendingshed.com/kacoupling.html

When I took it to my authorized KitchenAid repair guy he said you need a 7mm wrench and you need to make sure it has a VERY thin depth/girth of the wrench. He actually held his wrench tip to a metal sander and made it thinner on each side without compromising the integrity of the torque of the wrench. This is to make it fit properly under the coupler and around the shaft. Anyway, can rip off the rubber cap of the coupler, hold the metal disc part TIGHT with pliers, and stick the wrench beelow the coupler and above the base body. (The rubber coupler left still on it might make it easy for the pliers to grab, but you rish tearing it and maybe stripping the shaft or your wrench. Make sure the rubber piece is good and strong if you are going to do this.) If you look hard at the rotator shaft sticking up, it is not completely round -- it has two flat sides (for the wrench to brace it). Lastly, to finally loosen the coupler off the shaft, you hold the wrench constant on the shaft and you twist the pliers CLOCKWISE, as though you would be tightening something. Again, LOOSEN=CLOCKWISE. You are not tightening... The coupler thread is opposite the normal threads we are used to. The coupler is lefty-tighty and righty-loosy. The trick, I believe is finding the perfect wrench so that you don't feel like you are stripping the shaft or wrench. Then you get your new coupler and lefty-tighty it on.

Aside: Looking at the coupler, after the rubber is pried off, you can imagine that there is a special tool that fits into the little holes to make the twisting easier. My repair guy thinks this was the original intent, but perhaps the special tools for this repair process are not available since now there is an newer KitchenAid blender out with a different coupler design (and repair process). But this works. I even bought an extra coupler off him to do it myself the next time. The "authorized" dealers are few and far between in my part of the country, my nearest 3 hours away. I couln't even find a closer "unauthorized" person to repair it! I loved this blender enough for the 3 hour trek, though.

Hope this helps!!