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Gripper Comparison
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The only accurate way to compare two grippers of similar strength is to close both of them. Due to variance in grippers, models from specific manufacturers can only be ranked in terms of general difficulty.
The gripper on the left is slightly easier.
Guidelines can be established for progressing in difficulty from one gripper model to another. These are primarily based upon spring size and individual experience trying grippers from multiple manufacturers. Current gripper progression charts can be found on the Gripboard and will not be maintained on this site. Manufacturer published ratings cannot be relied upon, as each manufacturer measures their gripper strengths in different ways.
An engineering firm called PDA attempted to create an accurate numerical representation of the strength for an individual gripper. Even with extensive testing and access to the most experienced grip enthusiasts in the world, accurate numerical calibration for the difficulty of closing a gripper could not be established. Anyone interested in attempting to devise a method of comparing grippers is encouraged to review PDA’s calibration work first.
