IMPORTANT NOTICE: Since Thingiverse was having performance issues and people are reporting getting 404 errors, I decided to place all my designs on my own website https://properprinting.pro/product-category/3d-print-files/ All files can be downloaded from there for free and all updates and new designs are placed on there too.

This design is based on a toggle clamp and the difference is that the last part of the stroke is linear. As an example, this feature is useful for applications in which a probe must come in contact with a PCBA to test or program it. This is where I got the idea from. This design can be used like a normal toggle clamp because a fair amount of force can be applied at he end of the stroke and the clamp will hold just fine. I tried it with the kitchen scale and 3kg was not a problem but this was the maximum value of the scale.

This design consist of 16 parts (2× part 12) as can be seen in the PDF drawing. The linear stroke is as long as the slot in part 6 and 11 which is 10mm.

Please consider buying me a coffee if you liked it or helped you :) http://ko-fi.com/properprinting/

EDIT: I have created a T-slot plate which can be used to fixate things to grind them and I have modified the two brackets to match the 20mm pitch https://www.thingiverse.com/thing:3641151. The updated files are: LTF-M-50105 and LTF-M-50115.