Hi
Can you use envelope on linear dimension? It is commenly used in holes. But if we look in old keyway standards they often use h9 for width length and thickness and back then envelope was included in h9.
/Paul
Hi
I have screw a4-80 witch is used with a aluminium thread. As i have understood it you reduce the strength of the joint based the difference in yeild strength.
But a structural engineer claims that you also reduce the capacity off the joint based on the diffrence in the young module between...
If someone is using a torque wrench and there is to little thread and he hit the predrilled hole with the bolt. Will the guy using the torque wrench notice that? So that he can change bolt or add some thread?
I told our cheif engineer in a case that the thread will be too little if the schim...
Hi!
I have a case as shown in the picture below. The shaft between the couplings have no support.
The problem is that i get shock loads but not when the engine is running. I have solved the case where i get a axiell shock load by pressing the axis toward each outer hence i get no axial...
Hi
For milling there is design guidelines that you should not mill deeper the 3 times the diameter of the tool.
Are there any similar design guideline when you drill holes for dowel pins? How deep can you go?
When i a am looking at a sperical washer and a conical seat according to din 6319 The reseller define the load capacity in terms of static load see example below. What does that mean? Does it mean it can handle larger dynamic forces? Or that it cant handle a varying load even if it is below the...
Hi,
I am used to work with proof load for metals. But when i look for proof load for plastic i do not know what that mean.
When i looked at one site they said that UHMW polyethylene had a proof load of 18 MPa at 50% deformation. My question is what does proof load mean for a polymers such as...
Hi
I have two parts one with countersunk m8 holes and one with threaded m8 holes. Since it is countersunk holes i can not move the screw to fit the center of the threaded hole. My thinking is to put position tolerance on the threaded hole and the countersunk hole to limit how much off center the...
Hi :)
I am looking at a tool spring from special spring with very high compression force 20000 N diameter 32 length 50. I have got a advice from a reseller that i should have a hard washer so the spring do not dig in to the material. The spring only have a stroke length on 5 mm.
How hard...
Hi
I am looking at a spring from a spring manufacturer with very high compression force 20000 N diameter 32 length 50 see link below. Have hard to find a spring that can handle that high load elsewhere.
But the manufacturer do not have any fatigue data. When i spoke to a reseller he claimed...
One of our engineers claims that you can not calculate do on these welds (the a3 and z3 weld in the picture).
Because the weld will not be X-rayed as a result there can be crack starters in these welds. He says that you need 3 things
to do calculations on these weld 1. Material data 2. Load on...
Hi,
I have a case here where i would like to know what the stress concentration factor conservatively (see below). I have heard that if you set 3 then you are safe?
Hi!
I need some good tips :). I don't know where i shall place the datum features in this drawing see picture below, since i dont have three surfaces normal to each other. I am using the iso standard.
I need to put a concentric tolerance between the holes. On the big hole i need to add a...
