Thread Cutting Calculation

Thread shear calculation

Input data:

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Calculation result:

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Thread shear calculation formula

d = √ [4 × F / (π × τsr × i × z)]

τsr = (0.25…0.35) × σt

d — bolt diameter, mm;

F — applied load, H;

τsr — permissible shear stress, MPa;

σt — material yield strength, MPa;

z — number of shear planes, pcs;

i — number of rods, pcs;

0.25…0.35 — permissible stress coefficient

Learn more about the calculations by referring to SP 16.13330.2011 «Steel Structures»

Information

Our online calculator allows you to quickly perform shear thread calculations to determine the minimum allowable diameter of the threaded part of a rod under a given load.

The main issue with a bolted joint as a method of assembling two or more parts is the negative impact of the load on the thread. To optimally determine the calculated strength of the bolt element, it's best to base the calculation on information about the material – specifically, its yield strength. The values of this parameter have been extensively studied and compiled into tables.

For strength calculations, it is optimal to sequentially check the diameters of the rod for actual stress. The goal is to select a rod diameter such that the applied load will not destroy the material from which it is made. Shear and crush thread calculations are performed when one of the threaded parts is made of a material less strong than the other or when using threaded parts with non-standard parameters.

Advantages

Shear thread calculations are performed in the online calculator:

  • it's fast and convenient: there's no need to download or install anything in advance;
  • accessible to any user: registration is not required;
  • accurate and at the same time understandable: the digital tool has all the necessary labels.

The main advantage of the calculator is the time savings: entering values and even testing different options takes only a few seconds. At this speed, obtaining results will be very quick.

Data

The online calculator requires only a few input values:

  • applied load (specified in Newtons);
  • theoretical yield strength of the intended material (MPa);
  • stress coefficient (dimensionless);
  • number of stress planes (pcs.);
  • required number of threaded rods (pcs.).

After entering the data, the built-in algorithm will immediately perform all calculations, and the calculator page will present the result.

Our shear thread calculator helps you calculate thread shear strength, determine shear force on the thread, and compute thread shear stress. You can use it to calculate the shear thread turns to ensure that the thread turns do not lead to the joint's failure under the applied load. The online calculator provides accurate results, making bolt shear thread calculation a straightforward task. This is especially important when the thread shear load can critically affect the safety of the structure.