Hello,
I am looking for a specification for identifying pearlite in cast iron sample. I see that the AES ductile iron microstructures chart for judging pearlite / ferrite percentages. I also have ASTM A247 - Evaluating the Microstructure of Graphite in Iron Castings. However, that does not...
I am calculating the axial run out of a disk that spins on a shaft with bearings.
See this example (not mine) of checking the axial run out.
Also see the definition of axial and radial run out.
I am given the radial run out values of the bearing cup and cone. why would these radial...
Hello All,
I am looking for a worked out example of a cast to machined surface stack up. Or any resources would be helpful.
The only thing that I have found is this example. But I’m not sure I am computing it correctly.
https://www.dimensionalconsulting.com/cast-to-machined.html
Hello All,
A couple questions on plastic welding. I'm interested in those with practical experience in the subject.
Is plastic welding suitable for structural applications? I think the most obvious concern is fatigue, as there is not well-defined endurance limit for plastics.
Are there any...
Two holes, diameter min = 5.0 , max = 5.7
Hole 1 coordinates 700 =x1 , 200 = y1
Hole 2 coordinates 750 =x2, 500=y2
I am struggling how to find the min span of the holes with the given multiple segment position tolerance. The span will be the hypotenuse of the triangle formed by the...
If finding the maximum x direction the position is allowed to deviate, then it would simply be 1/2 of the position tolerance of 0.2 = 0.1, as shown in circle 3?
The y component, or distance from the B datum would remain unchanged, correct?
Applying a surface tolerance on a surface without datum reference. Is this flatness? My knowledge is limited in GD&T.
Is this true ? I am having a hard time seeing it.
I want to ensure that the profile of the surface is 1mm. I did not want to reference datums, as I read datums were not...
Hello All,
Classic interference fit equations computes stresses in a bore and a shaft of two different materials. ( i.e., material 1 bore, material 2, shaft) As shown:
I have a shaft ( or bushing in my case) that is made of two different materials, steel outer and rubber inner:
Not sure...
This is just a concept drawing I created to show the example. I have a hole with a position tolerance of 1 ref to datum a, b and c. and I am confused.
Does this mean that the hole can vary 1mm from datum a (easy to see) , and the same for datum b and c ?
I am struggling to see how...
Hello Eng Tips,
Does a thread pitch of 1 mean that for example 1 thread per millimeter ?
So I I needed 10 threads, the depth would need to be at least 10 mm in depth ?
Trying to overlay two parts to see the difference. I keep seeing videos online saying to use DMU space analysis.
I do not see the icon anywhere. How to tell if I have a licenses to that feature ?
Thank you.
Hi All,
Having trouble understanding how suspension busing are made. Is the rubber heated and then injected into metal housing ? Is this when the
Vulcanization occurs ? Or is the rubber already in the shape of the bushing , and is placed into housing and then undergoes vulcanization?
I’ve...
Hello Eng Tips,
Can anyone help me understand what a bearing spigot or spigot bearing is, for an automotive wheel bearing ?
Google just confused me. Is it a feature or a type of bearing. Any images/figures would be appreciated.
I am hoping someone can help me with this question.
Part was meshed and contacts created. In came a request for a small geometry change. I deleted the old mesh on that section, imported the new geometry and re-meshed that area.
I can not seem to figure out how to merge or make the two...
