Cold Saw/V1 Design Rationale/Hold System/Vise

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  • The vise mounting holes should be counterbored such that the fasteners do not interfere with the parallel top surface.
  • The vise handle should be welded to the Threaded Rod at the handle's center such that the diameter of handle rotation is not excessively large.

Auto-Centering Vise

Improves cut quality and fits more workpiece sizes and shapes


Auto-centering occurs because the 2 moving blocks move towards and away from the center when the handle is rotated one way or the other. The handle is welded at its center to a threaded rod; when the threaded rod rotates, the left-handed nut and right-handed nut move relative to the threaded rod. The threaded rod is held in place relative to the fixed block by shaft collars. Because the threaded rod does not move relative to the fixed block, the nuts must move relative to the fixed block. The nuts are welded to the outside faces of the moving blocks such that when the threaded rod rotates, the nuts, and hence the moving blocks, move relative to the fixed block.

The shaft collars prevent the shafts and threaded rod from moving under friction and handle rotation, respectively.

The thrust washers minimize friction caused by the rotation of the threaded rod's shaft collars under clamping tension.

Cut Location Notes: If the cut occurs at the center of the clamping volume, we achieve maximum clamping rigidity and optimal vise dimensions to facilitate angled cuts (because the vise needs a wide mouth for angled cuts, better to go wide from the center than anywhere else for maximum rigidity and dimensional uniformity).

Cut Depth Notes: At all possible cut angles, the blade must not contact the vise.

Vise Dimensional Notes: The vise achieves maximum rigidity and minimum material usage when its clamping volume is as close to its mounting surface as possible.

Feature: Adjustable and Removable Vise Jaws

  • Adjustable and Removable Vise Jaws (to accommodate variety of workpiece shapes and dimensions)