It might be a little hard getting back in but you have no problem pointing out how your skill have changed to help your new company of job.
"In this house, we obey the laws of thermodynamics." Homer Simpson
I also tend to use limit dimensions. It limits the chance of errors reading drawings. People should be able to read drawings but they still have problems reading drawings.
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
That temp look vary low to me. DickDV & edison123 are righ. The big question is how much does the room temp change? If you are at a constent temp then this might not be much of a problem but if the room temp is going to be going up this could be a problem. That is what when motors are tested...
By zekeman is right bearing are simple. With this small of a motor ball bearing might work. If it do then you can stay with a std motor. Over overshooting will be harder if it is to tight of angle.
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
Talk to the motor vender. They know more about the motor and the bearings. This is the type of question that the motor manufactures get all of the time.
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
By the way it is not 50% change in speed
4 pole @ 60 Hz is about 1800 RPM's & 50 Hz is about 1500 RPM's
6 ploe @ 60 Hz is about 1200 RPM's and 50 Hz is about 1000 RPM's
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
In Wisconsin you need I think 4 ref. When I got my ref I had two of my former direct supervisor both PE's but EE'e not ME's the other two people that I picked were both ME's but did not have there PE's.
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
I think that there is something is worng. I would think that something is worng. Dynamic coefficent is always less static friction coefficent.
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
If you dig in to the SKF NSK or NTN they have all the informastion that you need. The last time that I did a clearances check of a bearing I just opened up my bearing book. I bet that there is something on there web pages that should help.
Chris
"In this house, we obey the laws of...
Talking about the back of the hand test. The lab techs that I have worked with had a quick check. If you can keep you hand on a motor for more then 5 sec the temp is under was 120 deg F.
But hear is something more useful check the temp rise of the motor. For ever 10 Deg C of constent running...
Your bigger question should be what country is the hand rail going to be used in? The worst case loading ranges widely in the world, it will also depend on it usage, will it be used as an anchor point or just a handrail. From what I have read on hand rail Australia has one of the highest...
I would think that you will need to derate the motor if you were using the full 1/4 hp, but with using only 1/8 hp you might not. I would run the motor for 5 min and check the temp.
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
Blocking the shaft is normal on motor, but on generaters we would often just leave them free to spin. But the we didn't push the bearings when compeared to the bearing C and Co value.
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
If I was you I would run it at rated voltage and if you can run full load amps. Also check the vib's of the unit. An over speed and Mager would also be a good check.
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
As far as I know a PE is not required for a HAZOP. I don't see why a PE would be needed you are not doing any drawings or cal's, it is your engineering opition that goes in to the HAZOP's.
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
