The relationship between the height H and the pitch P is found using the following equation where θ DesignationĪ metric ISO screw thread is designated by the letter M followed by the value of the nominal diameter D ( D maj in the diagram above) and the pitch P, both expressed in millimetres and separated by the multiplication sign, × (e.g., M8×1.25). The outermost 1⁄ 8 and the innermost 1⁄ 4 of the height H of the V-shape are cut off from the profile. In the plane of the thread axis, the flanks of the V have an angle of 60° to each other. ISO metric threads consist of a symmetric V-shaped thread. Each thread is characterized by its major diameter, D ( D maj in the diagram), and its pitch, P. Double and triple clicks help you select closed paths and solids in 3d.The design principles of ISO general-purpose metric screw threads ('M' series threads) are defined in international standard ISO 68-1. Just some common things which cannot be restored from videos: To move camera around selected object you need to hold middle mouse button pressed and to shift camera - hold also Shift button. Videos are without narration, but I tried to make them short and understandable. I've made these three video tutorials to share my experience of using common tools and some useful tricks.

Once you have downloaded and installed it from the download page you can start your experiments.

Still it's quite a powerful and easy to use tool, which I consider to be the best available free CAD modelling tool. In fact it's a limited version of SpaceClaim Engineer. That's why when I found that DesignSpark launched free DesignSpark Mechanical modelling software I was just excited.

Unfortunately, professional CAD software is expensive. Not saying that to 3D print you just need to model it in some design software. It can save your time and resources and give you certain insights on improvements of your initial idea. It's generally a good idea in DIY(and not only DIY) projects to model your future device in 3d before start actually making something.

Designspark cad