Source-backed replacement directory
STM gearbox replacements & cross reference
5 directional replacement records connect STM model numbers to manufacturer-published target models. Open an exact model below to see the source claim, target, and remaining fit checks.
Replacement records5Target brands1Evidence publishers1Evidence types1
Published replacement targets5
Winsmith0301 STM model mapped
Winsmith0451 STM model mapped
Winsmith0501 STM model mapped
Winsmith0631 STM model mapped
Winsmith0851 STM model mapped
All STM replacement records5
Evidence scopeRead before ordering
What these pages represent- Every relationship comes from a manufacturer-published interchange/cross-reference source or verified successor notice.
- Each exact model page cites the source and preserves its claim scope.
- Multiple publishers can map different STM configurations to different target families.
What still needs verification- Ratio, torque, motor/input, bore or shaft, mounting dimensions and accessories.
- Service factor, duty cycle, starts, shock load, lubrication and environment.
- Any source-specific caveat such as mounting differences or required hardware changes.