Removing a seized, rusted woodruff key from a crankshaft without specialized tools or timely mobile mechanic support is extremely difficult and destructive.

Existing methods (penetrants, heat/cool, cutting) are not effective on heavily seized keys; accessible mobile mechanics are booked out weeks; no purpose-built tool for this specific task is available to DIYers.

Severity

4High

Willingness to Pay

implied

Added

Jun 3, 2026

Workarounds Described

used a chisel to try and push one side down so the other comes up
used a dedicating small tapping tool to push one side down and the other side up
used a dremel with a cutoff wheel to create divots in the key to destroy its structural integrity
used a mini torch to heat the surrounding crank and compressed air upside down to cool the key

App Concept

KeyOut Pro

KeyOut Pro is a compact, portable hydraulic puller designed specifically for seized woodruff keys on crankshafts and shafts. It applies controlled vertical force under the key to lift it without damaging the shaft. Includes a propane heat collar for localized heating and a cooling tip for thermal shock, maximizing removal success in one setup.

Key Features

Hydraulic lifting jaw that fits under key edges
Integrated propane heat collar for localized heating
Penetrant injection port
Compact design for tight engine bays
Safety lock to prevent slippage

Target Users: DIY mechanics and small auto repair shops working on older vehicles with rusted fasteners

Revenue Model: $59 one-time purchase per kit; $12 refill for penetrant cartridge

Existing Solutions Mentioned

rust dissolver gelPB blasterchiselsmall tapping tooldremel with cutoff wheelmini torchcompressed air

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