Questions tagged [threads]

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Thread identification

I am having a very difficult time identifying this thread. This part is a plug that I am trying to replace because the threads were stripped. The best fit for pitch is 11 threads per inch (imperial), ...
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117 views

Calculation of critical internal thread according to VDI 2230 Part 1

I’m doing a “Systematic calculation of highly stressed bolted joints – Joints with cylindrical bolt“ according to VDI 2230 Part 1. In step of calculation R11 “minimum length of engagement”, when my ...
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157 views

What is the minor diameter of a thread in terms of its nominal diameter and pitch?

I'm trying to find the formula for calculating the tensile stress area of a bolt. According to page 1528 of The Machinery's Handbook (29th Ed.), that formula is given as $$ A_S=\frac{\pi}{4}\left(\...
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66 views

What is the load response of a threaded fastener?

Due to the fact that pipe flanges rely on bolts, and bolts rely on friction, it seems obvious to me that in deflecting to meet the load, the nut will immeasurably turn. So my question is - how much? ...
2
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0answers
169 views

Thread-locking on AISC Clevises

I have a project that includes some standard AISC clevises on threaded rods in pure tension. I am trying to find guidance on how best to address the possibility that the rod could rotate with respect ...
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13 views

How to repair stripped, leaky pneumatic fitting?

I have a pneumatic cylinder with a stripped fitting, which causes a slow leak. I took it to a machine shop and he tried to re-thread it but there wasn't enough good metal left to get a good thread. He ...
1
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0answers
40 views

Decision criterion if bolted joints are loaded concentrically or eccentrically

When dimensioning bolts I have to decide if the applied load is concentrically or eccentrically to the bolt axis (according to VDI 2230 but I think in other approaches too). But how do I decide and ...
1
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0answers
94 views

Calculating the lifting force $F_{Kab}$ with SolidWorks – according to VDI 2230

I’m not sure if my procedure to simulate the lifting force $F_{Kab}$ is correct. So I illustrate my way how to get the lifting force $F_{Kab}$ using SolidWorks and the simulation tool. I hope you can ...
1
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1answer
106 views

Tapped thread maximum load

I am building a stair from aluminium to go to my basement, the stair sides-plates are made from 10mm thick aluminium AWS 5454. I am planning to tap M10 thread into this plate. To avoid the step ...
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28 views

Maximum strength size thread for aluminium sheet per thickness

Is there a rule of thumb, or a table which helps one determine what is the maximum strength thread size to use for aluminium sheet? I am interested in threading 3mm, and 2mm thick sheet aluminium. I ...
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32 views

M thread as leadscrew

Hello I was searching net but can find information. I am doing a hobbyist project. I would like use shaft with metric triangular thread as a leadscrew. Can I do that? I know ACME will be loads better ...
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34 views

Screw Cap design for high pressure surge vessel

I'm designing a pressure vessel with a relatively large cap that provides access into the vessel, what recommended thread specifications is needed to maximized locking and safety against faliure or ...