Singer 211G155 - Auto Upholstery Worthy?

[hyttogpine]

400 watts. 746 W / HP so this is 400 / 746 = 0.54 HP

Tom

northmount

Your calculation - watts to HP - will it be the same, whenever we taking about 110 or 220 voltage ?

I have an old Singer motor (on a heavy 45K25). Is it possible that these motors is constructed to be weird as 3-phase alternative 1-phase?

[Northmount]

Power in watts = voltage x current (amperes) x power factor. This is true for all single phase AC services. Power factor for an induction motor is typically in the range of 0.65 to 0.8.

For three phase circuits multiply the above result by 1.732 (the square root of 3).

Tom

[hyttogpine]

I'm sure you meant it well and I'm sure your answer is absolutely correct. But unfortunately I belong to the crowd, to whom the answer is like hieroglyphics.

If I already have known the electricity-law (Ohm's law ?) My asking to you was superfluous.

If you try to ask and at the same time give your electric-formula, to any women, you like, in any age and education, the next 10 years. You mabye end up that 1% or 2% know what you're talking about and are able to use the formula.

Since I never have understand the principle of electric, I have many times, through the years, ask colleagues, neighbours and acquaintance : will it function if I do so (electricity), can I change this two and connect those instead of etc. And my experiences tells me, that lower than 50% of all men, no matter of age or any education, have no clue.

Under condition I'm not a joker - your answer will reach less than 25% of all people in this world.

Ergo more than 75% have no help from the answer. And I think it was not yout intention.

If you don't feel I've been unfair. Would it be possible to answer yes or no (roughly yes or no), to my question about HP will change if a motor is in 110 V respective 220 V (same watts) ?

My regards to you. It's respectful when people learn their lesson in schooldays and craftsmen without academic aptitude, can communicate.

[Kohlrausch]

Would it be possible to answer yes or no (roughly yes or no), to my question about HP will change if a motor is in 110 V respective 220 V (same watts) ?

Hi,

same Watts means same Horsepower.

If you change the Volts and want to keep the Watts (and Horsepower) you have to change the Amperes accordingly.

Greets

Ralf C.

[Constabulary]

Hey Kohlrausch - just noticed your from Hannover (Lowersaxony) - thats approx.100km south of me. I´m about in the middle of BREMEN + HANNOVER

Welcome to the jungle!

[Kohlrausch]

THX. Learned a lot from your posts - and like the pic. Rather rare for a Kraut to operate a 111.

Greets

Ralf C.

[Art]

northmount

Your calculation - watts to HP - will it be the same, whenever we taking about 110 or 220 voltage ?

I have an old Singer motor (on a heavy 45K25). Is it possible that these motors is constructed to be weird as 3-phase alternative 1-phase?

Three phase alternative one phase would be indeed be weird. Because of the way single phase motors work you need to have starting and often run capacitors for them to actually go in the proper direction on startup and then to stay running with a load on them. Three phase motors don't require any of that except in uber technical situations. Being as you don't have an electrical clue, going through the necessity for the current to lead or lag just wouldn't make sense and would glaze your eyes over.

HP is HP no matter the voltage. You can't run a 120 volt motor on 220V, at least not for very long. Northmount's explanation was correct (to us) but was not a course in AC electricity. What he said is that you have a 1/2 horse motor that runs on 120V single phase. Occasionally there is a switch or wiring ability for 220V, but yours is not so equipped.

Art

N3CAF

[Northmount]

You can read the amps (current) and the volts from the motor nameplate. As above, you can determine Watts from that. and 746 Watts = 1 hp. For an older motor, use a power factor of 0,6. Newer, use 0.75. The motor nameplate will also tell you if it is 3 phase. If no mention of 3 phase, it is single phase.

So all you need to do to compare motors and their wattage or hp, it's a simple substitution of the values into the formulas. That is something like grade 6 or 7 math.

You asked a specfic question and I answered with the specifics. I ihave no way of knowing your level of understanding of math or electricity.

Tom

Hope this helps with the comparisons you are trying to do and understand.

[Trox]

Anyway, that motor won't sell for 25 USD. If he paid 400 dollars for that motor then he should complain to the police, it's a robbery! Only good thing is that's a four pole motor, they are easier to control and can rotate both ways. However, it's add no value to the machine, you most likely will give it away and install a servo motor.

Tor

[MFloyd]

Gentlemen, I also have a Problem with my Singer 211G155.... I would like to slow it down a bit. I was wanting to replace the 4in. pully with a 2in. pully....Problem, I don't have a clue where to find a 2" pully. Could any of you guide me to a place that I could acquire one.   Thanks a lot.... MFloyd