Source-backed replacement directory
Winsmith J Series gearbox replacements & cross reference
6 directional replacement records connect Winsmith J Series model numbers to manufacturer-published target models. Open an exact model below to see the source claim, target, and remaining fit checks.
Replacement records6Target brands1Evidence publishers1Evidence types1
Published replacement targets6
Falk / Rexnord03UCBN21 Winsmith J Series model mapped
Falk / Rexnord04UCBN21 Winsmith J Series model mapped
Falk / Rexnord06UCBN21 Winsmith J Series model mapped
Falk / Rexnord07UCBN21 Winsmith J Series model mapped
Falk / Rexnord08UCBN21 Winsmith J Series model mapped
Falk / Rexnord09UCBN21 Winsmith J Series model mapped
All Winsmith J Series replacement records6
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 Winsmith J Series 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.