Nail Removal Leverage Mechanics Simulator

Mechanical Advantage 12.0× Effort arm vs Load arm

Hand Pull Force 150 N ~33.7 lbs applied

Extraction Resistance 1800 N 16d Penny Nail Gauge

Wood Crushing Pressure 14.4 MPa White Oak Limit: 52 MPa

Direct Action: Click and drag the handle end of the pry tool to apply leverage. Notice how adding a fulcrum waste-block increases mechanical advantage and prevents wood crushing.

Tool Geometry CAT'S PAW

Extractor Tool

Lever Handle Length 300 mm

Fulcrum Pivot Offset 25 mm

Insert Waste-Block Fulcrum (+20mm pivot height)

Fastener & Material

Lumber Species / Grain

Nail Gauge (Penny)

Embedment Depth 50 mm

Nail Removal Leverage Mechanics Simulator

SAFE EXTRACTION

Mechanical advantage of 12.0× reduces hand pull force to 150 N. Wood surface compression remains safely below White Oak crushing threshold.

Nail Shank Bend Risk:	SAFE (0% Yield)
Wood Surface Damage:	MODERATE WITHOUT BLOCK
Min Force Required:	150 N (33.7 lbf)