Grip and Hand Strength Illustrations Criteria Freq Description (Max) Grasp with full hand, Rep 4 lbs. typically with thumb A. Grip overlapping the first Inf 20 lbs. finger. Rep 2 lbs. Grasp with finger tips only, typically with B. Pinch Grip fingers and thumb not Inf 9 lbs. touching. Rep 2 lbs. Grasp with thumb and C. Key Grip side of the first finger. Inf 10 lbs. D. Push Rep 3 lbs. forward Push forward with pad with of index finger. Inf 15 lbs. Finger E. Push down Rep 3 lbs. Push down with pad of with Index index finger. Inf 15 lbs. Finger F. Push Rep 4 lbs. Push forward with pad Forward of thumb Inf 21 lbs. with Thumb Rep 2 lbs. G. Push Down Push down with pad of with thumb. Inf 10 lbs. H. Pull with Rep 2 lbs. Pull toward body with Pinch Grip pinch grip using thumb Inf 10 lbs. 0.1” and index finger. I. Pull with Rep 2.5 lbs. Pull toward body with Grip grip using thumb Inf 13 lbs. 1.6” and index finger. Hand Tool Design and Selection Tools: Checklist answer indicates need for additional investigation. YES NO NA “NO” Tools selected to limit or minimize: Exposure to excessive vibration. Use of excessive force. Bending or twisting Finger pinch grip. Problems associated with trigger finger (prolonged flexion with forceful exertion).
Grip and Hand Strength Illustrations Criteria Freq (Max) Description A. Grip Rep 4 lbs. Grasp with full hand, typically with thumb overlapping the first finger. Inf 20 lbs. B. Pinch Grip Rep 2 lbs. Grasp with finger tips only, typically with fingers and thumb not touching. Inf 9 lbs. C. Key Grip Rep 2 lbs. Grasp with thumb and side of the first finger. Inf 10 lbs. D. Push forward with Finger Rep 3 lbs. Push forward with pad of index finger. Inf 15 lbs. E. Push down with Index Finger Rep 3 lbs. Push down with pad of index finger. Inf 15 lbs. F. Push Forward with Thumb Rep 4 lbs. Push forward with pad of thumb Inf 21 lbs. G. Push Down with Rep 2 lbs. Push down with pad of thumb. Inf 10 lbs. H. Pull with Pinch Grip 0.1” Rep 2 lbs. Pull toward body with pinch grip using thumb and index finger. Inf 10 lbs. I. Pull with Grip 1.6” Rep 2.5 lbs. Pull toward body with grip using thumb and index finger. Inf 13 lbs. Hand Tool Design and Selection Tools: Checklist “NO” answer indicates need for additional investigation. YES NO NA Tools selected to limit or minimize: Exposure to excessive vibration. Use of excessive force. Bending or twisting Finger pinch grip. Problems associated with trigger finger (prolonged flexion with forceful exertion).