Positive-stop vernier gripper.

Explore a setup

Choose a starting example, then edit OD, front/back mode, holes, pitches and match tolerance inside the workbench. Open the candidate table to inspect the ranked lock pairs.

Loading the gripper workbench…

How the decision is made

1. Required per-jaw travel is (raw OD − finished OD) / [2 × sin(included V angle / 2)]. Both CAD views share this stroke.
2. Fixed/moving hole pitches and the datum calibration define each lock position. Back mode mirrors the moving-hole numbering and uses its own diameter reference.
3. A second distinct hole pair must match the first pair’s calculated position within the selected tolerance.
4. Setup eligibility checks the mechanical stroke range, the 2.5–22.5 mm usable window and the back-side rear-collision diameter gate. Eligible dual locks rank before less suitable candidates.

Target-offset warnings and empty-jaw bounding-box overlap remain visible. Bounding-box overlap is an advisory rather than an automatic rejection. A map cell marked usable means the setup gates pass; it does not mean every target-accuracy or geometry warning has disappeared.

Using the workbench

Open / Raw / Finished / Closed changes the illustrated state. Side / Top selects the drawing view. Heatmap explores OD pairs; click a map cell to load it. After engineering parameters change, refresh the map before using it. Export CSV downloads the current candidate table.

The calculator orders the larger input as raw OD if the two diameters are entered in reverse. Changing hole pitch or V angle creates a calculation study; the embedded CAD geometry stays fixed. Manual mode requires two distinct, in-range hole pairs.

Model scope

This workbench studies setup geometry and positive-stop hole alignment. It does not calculate grip force, qualify structural strength or control a machine. CAD views use fixed drawing geometry; changing engineering inputs changes the calculation study.