Question about Cuisinart DCG-12BC Electric Blades Grinder
The bowl on the grinder twists but will not unhook from the housing. I've tried everything short of breaking the darn thing. Any ideas?
Remove the six screws that hold the lower plastic cover on the motor base (four screws are hidden under the adhesive rubber footpads). This exposes the lower end of the motor shaft, which has a slot in it. By inserting a flat blade screwdriver into the slot and holding the cutting blades with a rag or a wad of paper towel to avoid cutting one's fingers, it is possible to twist the shaft back and forth about 90 degrees. You may need another person to help, because one needs to perform this twisting action while pulling the motor base away from the grinding cup and blade assembly.
Once you get the @&%$#! thing apart, reassemble the motor base. (With the slotted motor shaft, why didn't the designers simply put a hole in the plastic base so one could stick a screwdriver in without disassembling it?) Now, use a small object like a toothpick or matchstick to activate the recessed motor switch so you can spin the motor without the grinding cup in place. Use the blunt edge of a small snap-blade utility knife as a scraper to gently scrape the plastic pin of the motor shaft as it spins, much as one would work a wood turning lathe. Periodically check the fit of the brass hub of the grinding cup on the plastic pin. Continue to shave the pin until the grinding cup slips onto and off the pin with no resistance. Take care to machine the pin uniformly from top to bottom, minimizing the creation of grooves.
Why this mechanism worked properly when my grinder was new about 18 months ago and suddenly decided to get stuck this week is a bit of a mystery. The unit in question has been used since it was purchased exclusively to grind flax seed, but the ill-fitting pin normally doesn't come into contact with foods, anyway. There was no obvious evidence of swelling of the plastic due to heat from the motor or oils from seeds. Since the blade and hub are free to travel up and down on the plastic motor shaft pin a bit, I suspect that on occasion the blade doesn't settle properly and the clutch doesn't engage, allowing the pin to spin in the brass bushing until it starts melting, and then the hub settles so that the clutch is fully engaged. This may happen in a matter of just a couple of seconds of operation. Once that happens, the pin conforms to the microscopic grooves inside the brass bushing, allowing it to still turn slightly relative to the motor shaft, but locking it on so that it can't come apart. If Cuisinart had made the pin more tapered and the hole in the brass bushing to match, much like a Jacobs taper on an industrial drill press spindle, this would be much less of a problem. BOTTOM LINE: Before loading the grinding cup and starting the grinder, push the blade hub down with your finger to make sure the clutch is fully engaged.
Posted on Dec 09, 2009
Several times before, the grinder bowl has been difficult to remove from the base, but became free after wiggling it a bit. Today it was locked on, and would no amount of wiggling or twisting would release it. I was afraid that any greater amount of force would break something. After waiting a while, and trying again without success, I got the idea of putting the whole thing in the freezer. (My thought process was that the locking pieces which mate up between base and bowl are all plastic. In normal conditions, they fit together rather snugly. What if the plastic components expanded, even minutely, due to either higher temperatures in the room, or heat from friction while grinding the coffee? I figured it would not take much expansion to cause them to bind up.) I left it in the freezer a short while; maybe about 15 minutes. I'm happy to report that when I took it out, the bowl unlocked and came off without the slightest resistance. So I'm thinking the freezing cold made the plastic contract slightly, and the parts released. PS: I don't think I would want to just forget about the appliance in the freezer. Definitely, the power cord was beginning to stiffen when I took it out. It is possible that letting it freeze solid might make cracking of the rubber possible.
Posted on Jul 03, 2009
This happened to mine this morning. I was so frustrated because the reason I bought this was because of the removeable bowl. My bf got it off but he broke off a piece of plastic (he is pretty sure the piece of plastic was on the bowl part).
I put it back on and it kind still worked- I think I will just need to get a replacement bowl now - but it was hard to get off again.
When I tried to get it off the second time, I moved it into the "unlocked" postion and then manipulated the the blade part while pulling and it came off - but of course mine was broken already.
There appears to be two areas where it locks - on the base and a part on the bowl. I think somehow they get out of synch.
The problem is not with the base I think but with the bowl.
Although, now that it is "sorta" broken - I can't remember what parts were supposed to be loose before and which ones were not. The blade part of the bowl is very loose now. My boyfriend is pretty sure the plastic broke off the bowl part so I am going to get another bowl. I hope that solves my problem!
Posted on May 28, 2008
Same problem. I even removed the housing and used a screw driver on the slot on the end of the motor shaft, and could twist the blade slightly hold the shaft from turning, but it still would not come off. I even used pliers to try and pull the blade off. Still won't budge.
Posted on Apr 12, 2008
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