A Great Electric Screwdriver but with Gears Made of Cheese: Post-Failure Teardown
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- čas přidán 30. 07. 2024
- If only the gearbox was larger this would be a perfect tool for me.
The new replacement:
Teardown: • Teardown of the Hanmat...
The electric screwdriver this replaced:
Review: • Review of the Electric...
Teardown: • Random Teardown #010: ...
I have a second channel:
/ @markfurneaux2659 - Věda a technologie
It looks like that gearbox is an individually sold component on Alibaba for $4 if someone wanted to keep repairing this product
What search term do you use to find it? I'm having trouble looking for it
@@imamagedude better late than never: "N20 reduction gearbox", also works for mijia electric screwdrivers
Give the ES121 a try. I have two of them that I use heavily at work for working on laptops and other small electronics. They've been going strong for multiple years now. They have more speed and strength than the style you show in this video. They do run around $90, but if you do work with small screws it is incredibly well built. They use a planetary gearbox and thrust bearings to drive the output. I've seen several teardowns on CZcams, and it's built very well.
This is interesting. Looks like the miniware one, but with a hex shaft! I'll keep this on my radar.
MX612E: motor driver IC, internal H bridge, 2.5A peak, 1.5A continuous, Vcc down to 2V.
Normal size bits: 1/4"
Small size bit: 4mm
Pretty reasonable gearbox, just let down by using a cheap sintered powder gear drive. Gearbox likely is available as a spare part, but is pressed together and then the screw mounting bosses are expanded to rivet the entire box together.
I used one of those exact motor&gearbox about 6 years ago that I bought off eBay for dirt cheap, they claimed surprisingly highly torque and max axial load for it’s size, I operated it at about 80% of that spec and it barely lasted 5 uses before the gearbox started skipping. Even right out of the box half a revolution was smooth and the other half was slower and jankier. Luckily I only needed it to last a handful of uses.
The reason for having the same tooth geometry throughout the gearbox is they rearrange the gears to configure the output speed/torque, you can order several different configurations that just put the gears in different orders.
Yeeesss another video from Mark. It’s like Christmas all over again.
I had a similar one as these as well bought at the local Action, it had a different casing but similar internals. Mine failed on the motor itself and not the gearbox interestingly enough.
At least it being bought locally allowed me to refund it under warranty.
4:30+ for teardown
Im subed i dont know how i missed the last two of your videos.
Holy shit you're still alive?
They likely view these as disposable electric screw drivers, either in whole or by the looks of the module, switch out parts.
Disposable $50 screwdrivers? 🤨 Dang, I guess China is richer than they seem.
@@user-vn7ce5ig1z But of course in china the parts are readily available. They probably have 100s of these gears in a box.
I got mine for
Great video! BTW Huahui is pronounced wha-way
From the "Gears made of cheese" in the title i expected the gears to be cheap plastic. They're probably cast aluminium or magnesium. Very brittle and weak
Battery 2 pis please
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Gear ⚙️ looks like low quality METALURGY IT SHOULD B HI CARBON METAI SO IT SHOULD NOT GET GAMAGE DUT TO OVER TIGHT this Tiny spare Gear ⚙️ one find v difficult difficult to get in market Cost of Search in market will b more costly & its cheaper to Buy New Pcs ...