Is the screw of a vice clamp a silk stick? How do you choose a screw with the same principle? The device requires a general assembly
Thread shape choice: can choose rectangular, triangular, trapezoidal, its bearing capacity is gradually increasing sequence, when the choice can choose according to machining ability and carrying case, but suggest buy from taobao, or single processing too much trouble. The diameter proposal is 18 ~ 20.
The screw on the top of the vice clamp is actually a silk pole. The first thing you don't know is how big a clamping device you want to do. It is recommended that you choose a silk rod that is no less than thirty in diameter (the specific pitch is chosen according to the actual situation). Note: the minimum material of the material is 45 steel. Silk mother chooses tin bronze silk mother.
The commonly used screw is not retracted automatically, but your "self-lock" is accurate and is a term. The specific reasons are theoretical and inexplicable, and they are not explained here. Also, if there is the use of the old screw, it is best to be able to make a cheap, reasonably practical bench vice.
Pitch choice: the larger the pitch, the faster the movement tongs, but the smaller the clamps. In contrast, the smaller the pitch, the slower the speed of the tongs, but the greater the clamping force, the typical example is the thread jack. The pitch suggestion is 2mm, that is the handwheel to turn a circle, the activity forceps the mouth to move 2mm
