Thread Number: 43940  /  Tag: 50s/60s/70s Vacuum Cleaners
Kirby Dual Sanitronic Question… 		[Down to Last]

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Post# 458050   11/18/2022 at 22:17 (516 days old) by OatmealMan (Utah )        

So I recently got a DS 50.
I was wondering why it shifts to a higher speed only when the hose is attached rather than just always have the higher speed on. Sorry if it’s a silly question but I don’t understand why you wouldn’t want maximum power at all times. Thanks

Post# 458052 , Reply# 1   11/18/2022 at 22:56 (516 days old) by Lesinutah (Utah)        
The

 lesinutah's profile picture
Motors weren't made to run on higher amperage with the field coil and the carbon brushes. You can make it run on high but it cuts the motor life in half and carbon brushes and bearing wear out alot quicker.

Post# 458053 , Reply# 2   11/18/2022 at 23:32 (516 days old) by electrolux137 (Los Angeles)        

electrolux137's profile picture


Because the motor will soon burn out. The higher speed is to give higher suction through the hose and wand but not meant to be used for long periods of time.

Post# 458055 , Reply# 3   11/19/2022 at 04:31 (516 days old) by CT77 (San Bernardino, CA)        
Overpowering motors

 I'm sorry, I have something a tiny bit off topic from the post, but I thought it was hilarious.

There is a guy on Youtube from the UK (I think his channel is "ibaisaic") and he was showing some vintage vacuum cleaners he had actually imported from the US. He was talking about how he of course had to use a step-down transformer since the UK uses 240 volts. One of the vacuums he was showing from the US interestingly had a rating for 120 volts either AC or DC. I would assume that must mean it has a series-wound, "universal" motor. He said he wouldn't even WANT to know what would happen to the vacuum if he powered it with UK mains...

I thought about that...imagine running a series-wound motor in a vacuum with DOUBLE the voltage it was designed for. LOL how long would it survive? I just imagine it would turn into a screaming, screeching jet engine before probably catching fire.

Post# 458081 , Reply# 4   11/19/2022 at 21:52 (515 days old) by Lesinutah (Utah)        
Difference

lesinutah's profile picture
The vacuums produce more watts less amps. Basically double the 110 to 220 5 amps to 2.5 amps. The reason you need a step-down is the current is different. They don't have souped up vacuums just altered to work as needed.


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