Kitchen Aid Worm Gear
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Publicado 2024-08-04
The stock gear in the Kitchen Aid is not a full enveloping worm but a helical spur gear. This is done for ease of assembly and reducing tight tolerances required in assembly for a full enveloping worm gear system. The stock gear is made from a stiff nylon plastic over molded on an aluminum hub. One theory is this nylon gear is also used for some mechanical overload protection of the gearing.
If the testing goes well I would be a good follow on video to make another that is a true helical gear or a fully enveloping worm using the dogmeat helical indexer shown in a previous video.
Cheers,
Tom
Todos los comentarios (21)
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Yes it is understood that this new gear defeats the mechanical overload intention of the plastic gear. In the finest tradition of American Hot rodding we will now see where the weak link is..... All the best, Tom
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Probably important to note that the original gear was probably designed as the "mechanical fuse" in the system to save the motor in case of overlaoding
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Finally, a project to justify all your tools and machinery to the wife. Look at this new gear I made for you, honey. And the best part is I saved us $8! 🤣
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Mr Wizard: The quote on the end screen was cut off, I went and found it: “I spent three days a week for ten years educating myself in the public library, and it's better than college. People should educate themselves - you can get a complete education for no money. At the end of ten years, I had read every book in the library and I'd written a thousand stories.” “There are worse crimes than burning books. One of them is not reading them." - Ray Bradbury
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That gear is worth more than the entire mixer.
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Really nice results. I get so much out of these videos. Really appreciate you taking the time and effort to make them. Dividing heads are pretty cool, amazing that someone sat down and figured that out, and even with computers it's still a pretty damn good way to do the job.
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Excellent Job!!! This video proves you are one of the best instructional machinists on YouTube. You teach methods that are applicable to the home shop machinist. Thank You for all your hard work!!
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You must be magically psychic, Tom. I am in the middle of a project where I have to nod the head of my mill to 30 degrees, machine a flat on the edge of some half inch plate, and then drill holes at 30 degrees dead center, on the just made, slanted section. I was trying to figure out a clever way to find center and was hating the idea of indicating off of the sharp edge. I was thinking that I was missing some trick of the experienced machinist, yet here you are. Perfect timing and well explained.
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Well I've watched it now and as expected it's well up to your usual standard Tom. I know there's no doubt excellent reasons for the dearth of videos recently, but rest assured they are all very much appreciated and I'm sure I speak for many when I say that I always learn useful, interesting and entertaining stuff from them. Thanks again, it's great to see you back!
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I really enjoy these videos. They have been an excellent education for someone that otherwise never had a proper shop class while in school. I made some straight cut gears a few years back for a custom gearbox on my solar tracker. Still working the same as the first day in service. All possible because of videos like this one. Thank you.
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Hey Tom, this gear is plastic for a reason .....Words taken from a Kitchenaid company repair blog >>> "There's a single nylon gear. The rest are made of metal. They've been using a sacrificial worm gear since the 1960s. KitchenAid switched to all-metal gears on their high-end models fairly recently. In the past, all models had a nylon gear, but the new high-end mixers use electronics to protect the motor." Take care Bud. Regards, greg
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The mind boggling precision of being a machinist. I know nothing about the trade but you have my respect.
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Truly helical. It was a torture at high school calculating the gear reduction to connect the divider head with the table. Mr. Rucker went through that last year I think. Thanks for the lesson Tom ;)
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Thank you Tom.. feels like a few years back when you were cranking out the masterpieces at high rate. Noticed I’m wearing a tattered ‘The Epic Egress’ tee this evening. Coincidence?? 😊. Thank you so much for the excellent content Sir!
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Great to see you making videos again Tom and this was a good'un. When you set me up with the private tour of the Royal College of Art workshops a decade ago, Steve was having exactly that 'off by one' error mental block about the hole count. My advice to him was, "don't count the holes, count the spaces".
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Tom, put the dough hook in the milling machine, mount the bowl on the table and your wife can mix it in the shop and finally heat treat it. You've got the EDM for slicing.
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Definitely enjoying this recent series of videos. “Make do and mend” should be taught in schools.
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Hi After watching you make the gear ,I had a similar problem with machines we used to have they, came in with nylon gears to protect the machine ,From damage, After changing them for a few times we came up with a better system, you can buy small clutches they fit in place and that clutch will save everything if it jams .you do not have to take the entire machine apart there are a few of these small clutches that you can buy and you can adjust them to the setting that you need
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Great video! I restored an old Hobart countertop mixer (considerably more skookum than a kitchenaid with a geared transmission), and it too had a fiber-impregnated nylon gear. I also assumed it was a safety feature. If your friend' wife is making considerable batches of bread, highly recommend the Hobart N50
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Man it's good to see you! Also I just realised something. When you used to work for a university as a machinist making cool stuff I thought you had the dream job. Now I have the dream job! So happy to follow your path and can only hope to be as knowledgeable as you.
