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Shredder motor
- This topic has 26 replies, 17 voices, and was last updated 2 years ago by
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I´m looking for a suitable motor. The bill tells that it must be +/-2000w and +/-70rpm. But I have only found mínimum 1500rpm. Am I misunderstanding something?
Hola
Luis as I understand it is the output of the shaft after the gear reduction that is 70rpm.
So either use a motor with an apropriate gear reduction or a voltage regulator to control the rpm.
What @epos says! You can use that motor and try to reduce the speed using belts, chains, gearwheels or other mechanisms
You’re going to see 1500 and 1800 a lot in motor speeds. The best way to get down to 70=ish rpm is motor gearing.
Where does 1500 and 1800 come from: You have either 50 hz or 60 hz AC electricity feeding your motor depending on your country. This powers electromagnets in the motor which pushes or pulls on the shaft to make it turn. There’s one “push” and one “pull” per cycle of voltage, and the most common motors have 4 poles (or electromagnets) built into them. So, if you have 60 hz x 60 seconds/minute x 2 (for one push and one pull) = 7200. 7200 / 4 poles = 1800 rpm.
Thank you all! So, I understand that the motor must include the apropriate ruduction mechanism. Is this mechanism also shown on the blueprints?
luis-depedro
starter
11/05/2016 AT 15:43 EDIT | MOVE | SPLIT | TRASH | SPAM |
Thank you all! So, I understand that the motor must include the apropriate ruduction mechanism. Is this mechanism also shown on the blueprints?
No there is not, would be good to have a design, that everone could make.
You can buy worm gearboxes of eBay, new & 2nd hand
Just fyi, normally, the worm gearbox (Motor reductor) costs more than the motor itself. You will not find a motor with less than 1000rpm in the market, so you will need to buy a reductor, or buy a motor with the reductor preinstalled, or build your own reductor with pulley belts like this one:
estimado Luis,
busca un motoreductor complete, consta del motor y caja de engranes, la caja de engranes es quien te dara las RPM requeridas.
algo asi..
http://www.milanuncios.com/otros-recambios/no912-motorreductor-monofasico-0-25kw-180101901.htm
dear luis,
look for a gear motor, it is the motor + the gear box, this gear box is the one that give you the RPM needed.
you can look on ebay for a gearbox motor
OK, but I think that the shredder is going to cost quite more than the price on the bill.
Luis,
For Spain you have 50Hz performance:
If motor is 1500rpm, get reducer Ratio: 20:1
If motor is 750rpm, get reducer Ratio: 10:1 (very rare, but possible and outlasts the 1500rpm motor)
In Europe you have easy access for italian reducers, they are cheap, good and plenty. Germans are good but generally more expensive.
If you can find factories (every factory has reducers for conveyor belts, machines, etc), try and get newspaper ads from recently closed factories that are liquidating their merchandise. Or try finding people that sell scrap metal containers (they often have these reducers with motor in the container). You can probably buy it for their weight in steel price.
Belts have problems, they get deteriorated and break on usage, you should always put a belt protector over the pulleys. Reducers just need proper maintenance and grease, greater Torque loads (effective power on shredding blades) and durability.
For used and found reducers, go Bonfiglioli, Motovario
Retail (new): TRANSTECNO (cheapest and lightest)
Hope this helps.
Hello, is there anybody overthere that can tell me if this is a good motor to use for the shredder? can we fix the shredderblades (we’ve cut them already) on this one? thanks, feye
Attachments:
Alguien me deja un número de teléfono o mail para contactar , estoy interesado en empezar un proyecto
El mío es [email protected]
0034653968612
Thanks
Hi Guys, this might be dumb but I just built a Maslow CNC and I was thinking, the stepper motors are under serious load at high torque, could these be a low cost solution?
something like: https://www.ebay.com.au/itm/DC-24V-5500RPM-115RPM-8mmx14mm-Shaft-Electric-Power-Turbo-Worm-Geared-Motor/302287056936?epid=775029919&hash=item4661b67028:g:8ZkAAOSwb9dZvq87
Hello everyone,
I was able to find 2.2KW motor (around 3 HP), and a gearbox connected to it which converts 1400 RPM to 97 RPM. I wasn’t able to find a gearbox that converts to 70 RPM. Would that be okay for the shredder? Or will it be too fast?
Please let me know if the motor power will be okay!
For the small amount that the Shredder can spread at one time. I feel that the motors are overrated. Liking the idea of the mobile unit, has anyone tried a 12vDC high torque, low-speed motor? like these shorturl.at/fDUV4
Much Cheaper and lighter 🙂
I have been looking at the idea of making the Shredder with Plastic,
components.
Thoughts
Cheers,
Craig
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