Dear Friends,
our supplier performed an observation on a failed electric motor of 3.5/5 KW. they gave us the megger value of new and failed motor.
new failed
1 38 terminal u1-motor body
1 38 terminal v1-motor body
1 39 terminal w1-motor body
1 39 terminal u2-motor body
1 39 terminal v2-motor...
Dear Friends,
3 years ago we purchased 200 numbers of 3 phase induction motors. Due to some reason, we did not use the motors and was in our ware house. Now we want to use the motors. Before assembling it on the machine, we opened one motor and found corrosion in rotor.
I request motor...
Hello experts,
We are receiving failed electric motors from field. The motor is connected to a gear pump.
Winding open is observed after checking the connectivity.
Important observations after disassembly of motor
Contact marks on drive end side of rotor and stator see attached figure
Outer...
Hello all,
Could you please explain over rolling direction? In many bearing articles Example: in Tribological Aspects of Rolling Bearing Failures by Jürgen Gegner, over rolling direction is mentioned on the picture.
What is the difference between rolling and over rolling direction?
How do we...
Hello All,
What is the meaning of Full width half maximum (FWHM) in bearing Analysis?
What does it specify?
Ex: micro structure
I have searched internet, but was not able to find article specifying importance of it.
Thanks in Advance
Hi
What is slip fit?
I searched machinery hand book, but could not find information on slip fit.
Where can find the tolerances for slip fit?
What is the standard way of designating slip fit? For example we use H7/p6 for press fit similarly what we specify for slip fit?
Thanks
Hi,
I have to design a pressure relief valve. the cracking pressure is 500 psi. please guide me in designing pressure relief valve.
which book should i refer and also i need to draw the performance curve.
Thanks,
Hi,
This may be a very weird question.
Can we give MMC to a radius dimension?
I looked in to few GD&T books, but it does not mention about the radius. On radius only “controlled radius” is mentioned
If yes, please help me. I have attached pdf of my product. When the Diameter with datum “A” is...
Hi,
Please guide me in giving GD&T to a radius (fillet). i have attached a ppt which explains my problem.
We have the interference problem when the male and female flanges are manufactured to the worst case.
Thanks
Hi,
We need to manufacture a custom bolt and also we need to mark the part number on it. Previously we were etching the part number on the bolt shank. But analysis & testing showed that etching reduced the fatigue life of the bolt. The bolt has a very thin shank. Laser marking is not an...
Hi,
I am little confused in selecting a tube fitting type.
We have 2 different pressure applications. One is 1500 psi and the other is 3000 psi.our customer has asked us to decide on the fitting type.
Is there any design criteria in selecting the fitting end i.e. flared, flare less and Lip seal...
Hi,
Thread specified on a bolt drawing is "M2.5 x .45 4h".
Is the thread British standard ISO metric or ANSI/ASME metric thread?
Which standard do I need to refer to get minor, pitch dia of thread?
How do we know about the standard used?
Thanks
Hi,
I have an attached an image.
Please explain about the chamfer dimension. The chamfer is provided to an angled surface.
The chamfer plays very important role in the functionality of the component.
On which edge do we provide the linear dimension and the 45 degree angle?
Thanks,
Fatigue life
I need to find the life of a bolt (no of cycles)
I have a bolt, which is subjected to fluctuating Tensile load of 0 to 2000 pounds.
The minimum cross section of the bolt i.e. at the root diameter is .095”.
I then calculated the max stress =max stress/Area, and found the max...
Hi,
I have 2 elastomeric materials and need to compare their Hardness.
The problem is hardness of one material is given in Shore "A" scale and the other in Shore "D" scale.
I have searched the net and could not find conversion table.
Please help me.
Thanks,
How to give tolerance to chamfer?
I am able to give tolerance either to the length or to the angle (attached image)
I need to apply tolerance to both length & Angle.
The other ways to achieve it is by placing a text(value) next to it etc., but can we give the tolerance using the method...
Hi,
We have modeled a component with tolerances.
By using the mean dimension the model get updated to the mean value.
Is it possible to update the model only for min and max dimension.
Do we need to purchase any new workbench for it?
If so, name of the workbench?
Thanks,
Par
Hi,
I need to calculate the fatigue limit of bolt (manual calculation).
Could you please guide me?
I have searched the net but could not get any similar document.
Please help me
