Search results for query: *

Hi everyone, I have a question about the door hinges on a large walk-in freezer used to store product for the frozen section of a large Grocery store. I noticed that when opening the freezer door, the entire door moves up about 3/4 to 1 inch or so. The hinges are designed with a helix /...

I ran across this thing called the "lever paradox" on page 19 of the book "1800 Mechanical Movements" by Gardner D. Hiscox. I think the same lever mechanism is shown in Gardner's other books on mechanical movements, some of which can be downloaded free via google's book search function. I...

Hi everyone, I would like to ask some questions and start a discussion related to U-bolts used to clamp leaf spring stacks on the suspensions of vehicles such as small to full size pickups, jeeps, and larger work trucks. Generally, most after-market U-bolt manufacturers recommend to never...

I stumbled across this GM produced auto-differential video tutorial online, and I thought it was kind of interesting. It's a "Jam Handy" production, who I think produced other videos of this type. http://www.youtube.com/watch?v=K4JhruinbWc Aside from my general interest in seeing something...

Hi everyone, In AutoCAD Mechanical 2007 I'm having a problem with colors. When I change the color of a 3D solid model part within an assembly, save the drawing, then open the drawing again, the part seems to revert back to previous colors that were used during the design process. Sometimes, a...

Hi everyone, I would like to get some feedback on the major differences between the so called high-end CAD / CAE programs like Unigraphics-NX & Catia, and the mid-range programs like Inventor, Solidworks, and Solid Edge. What I would mainly like to know is, in general, what can the high-end...

Hi Everyone, I'm trying to run a dynamic simulation on a cam & follower mechanism with Inventor Professional 11. The cam does not make a complete revolution but oscillates back and forth. The cam works with a roller follower that oscillates about a swing arm pivot bearing. Since the cam curve...

Hi everyone, I would like to ask some questions & start a discussion related to education, which is of course fundamental in self improvement and getting ahead. I don't expect the answers to be definitive, I'm just interested in hearing different opinions. 1. What do you feel are the most...

Hi everyone, I would like to start a discussion on the use of anti seize on vehicle lug nuts. Searching the net, there are people that claim to have used anti seize on lug nuts for many years with no problems, and some people that advise against it. I have two main questions I would like to...

Hi everyone, I'm hoping someone can clear up this topic a little for me. I've seen this discussed elsewhere and I'm interested in obtaining further clarification. It seems to me that if you have one fine pitch and one course pitch threaded bolt, both having the same diameters, grades, and...

Hi everyone, I have a metric U-bolt designation of M14 OD X 2 mm pitch X 60 mm long thread length and a 215 mm total length. There is a 79.5 mm center to center distance. The U-bolt is a 9.8 class, and it has a designation of "PX" after the class rating. I was told the PX designation is the...

Hi Everyone, I am having trouble finding what I would call a carriage bolt, it looks just like a carriage bolt except that it has a spline round shape under the head instead of a square shape that is usually under the head of a carriage bolt. The round shoulder under the head is a fine spline...

Hi everyone, Regarding Inventor 11 Professional, I noticed "service manager" Microsoft SQL server sqlmangr.exe loading at start up on a computer with Inventor. What does this program do and is it necessary to allow this to load at startup ? What functionality will be lost from Inventor if I...

Hi everyone, I'm hoping someone having experience with self locking nuts can help with the following. I need a self locking nut to be used on a 1/4-28 thread bolt. I'm not going to really torque the nut down, I'm just going to snug the nut down to take up any linear or axial play in the bolt...

Hi everyone, I need to machine two small parts. One part requires a yield strength of 100,000 PSI and one part requires a yield strength of 200,000 PSI. It's probably best to machine the parts from stock that has a thickness near the part thickness. There are some small internal radii and a...

Hi everyone, When I use the toolbar to select the fillet command and then try to fillet the corner of a 3D solid model in AutoCAD mechanical 2007, it says "invalid object selected". I'm using a small enough radius for the part size so that's not the problem. I'm trying to fillet the solid the...

Hi everyone, Can anyone please tell me the general difference between the coefficient of friction of a caged needle roller bearing versus a non-caged bearing of the same size ? I'm trying to get a general idea as to the difference in the coefficient of friction for a caged drawn cup needle...

Hello everyone, I would like to ask if anyone can please help me with the following problem. I have a small radial plate-cam and bearing housing (cam-housing) that is oscillated manually by hand via a small lever. The cam-housing is oscillated both clockwise and counter-clockwise from it’s...

Hi everyone, I have a round steel bearing shaft that is cantilever mounted. One end of the shaft is pressed into a rectangular steel support. The shaft has to be pressed close to one corner of the support so that the amount of material surrounding the shaft is not the same on all sides of the...

Hi Everyone, I need to mount a small rod-end bearing as accurately as possible. The rod-end has a male stud, externally threaded. The rod end is part # POSB4 from IKO. The 1/4-28 threads are Class 3A. I want to thread or press the male stud into the end of a round steel 1/2" diameter shaft...