Hello,
I have the following situation :
a little wheel (round 15mm.) is put on an axle (round 5) and retained by a retaining washer (Stainless steel, 1.4122, DIN6799, groove 3,2mm.) that fits on a groove in the axle.
After some while some of the retaining washers start to break brittle (no...
I am designing a sliding door runner system.
I should be very basic and low cost.
The top rails wil be made of Aluminium and the wheels of a plastic.
Is there a book / website / manual or whatever that can help me engineer the above parts regarding loads, strengths, frictions choice of...
Does anybody know what material skateboard wheels are made of ?.
I want to design some sliding gear for heavy doors, and the material skate board wheels are made of are of interest to me. If only I knew what material was used....
What is the effect of a (too) low melt temperature of PolyCarbonate ?
I have structural molded part. It doesn't break (short term) and its dimensions are ok.
But I have found that the melt temperature used of the PC is around 245 degrees celcius. It should be (if I am correct) around 300...
I am trying to gather as much information as I can. Therefore this mail :
I 2 have kinds of injection molded pieces of Lexan 143 R.
The color is black.
From both parts I have 40 samples from the injection molder.
2 out of 40 samples tend to break very easilly (britle break), without the normal...
In my CAD software (Alibre) I can only calculate the mass moment of inertia of a given part.
I need the second moment of inertia. I know I should go through my theory books, but maybe you could help me :
Can I "convert" my mass moment of inertia to the second moment of inertia ...
