Hi,
I am looking for a small 110 V AC motor at diameter about 25 mm, and speed over 1700 RPM.
Need help please.
Thanks
Adam

 

I think you will have better luck looking for a DC motor, rectify the AC and use a dropping resistor.

 

What kind of power does the motor have to deliver?
Max.

 

The smallest AC motor I could find diameter wise is 65mm. The problem with a motor that small is going to be a lack of torque. With a 25mm restriction, the armature will probably have a diameter close 13mm (or about 7mm radius) That's a very very small amount of torque and rotating mass.

As peterdeco suggested, a DC motor with a permanent magnet will serve you better.

If you will define your needs we can possibly offer an alternative solution.

 

Does the motor speed have to be controllable?
Max.

 

Thanks for helps.
The motor is for a experiment compare and measure the motion of AC/DC motor, speed no need be controlled, actually no much specific requirements, can be a little big diameter.
I am planning to buy one like the link and remove the gear box.

https://www.aliexpress.com/item/330...earchweb0_0,searchweb201602_,searchweb201603_

Best.

 

Thanks for helps.
The motor is for a experiment compare and measure the motion of AC/DC motor, speed no need be controlled, actually no much specific requirements, can be a little big diameter.
I am planning to buy one like the link and remove the gear box.

You may have a problem, the shaft of the motor is fitted with a gear and the front bearing of the motor is in the front plate, so it is very hard, say impossible to isolate the motor and monitor the shaft?
For DC motors, a local automotive wrecker is a good source.
Max.

 

Will a universal motor do? It can run off AC. If so, look inside a Dremel! it does well over 1700rpm, more like 30000 rpm.

 

The Dremel branded tools I have seen that run off AC are a bit bigger than 25 mm. MicroLux brands a smaller tool: https://www.amazon.com/MicroLux-Micro-Rotary-Tool/dp/B0815RLQQ6

I believe Asian equivalents of most MicroLux tools tools can be found, like this one: https://www.amazon.com/SPTA-AC110-2...g/dp/B074SH6CQD/ref=psdc_552862_t1_B0815RLQQ6

Didn't see the diameter for either listed on Amazon (not surprising) , but they look close to 25 mm, particularly if you strip off the casing.

 

The motor is for a experiment compare and measure the motion of AC/DC motor, speed no need be controlled, actually no much specific requirements, can be a little big diameter.

One issue with a Universal (series) motor is it operates in a runaway condition, RPM dependant on load etc..
Max.