Work Order IN PROGRESS
c. Early 1920s R&M 4312 Brass Fan
10" • 4-Wing Brass Blade • NON-Oscillator
This 1924 R&M Model 4312 Brass Fan is in the shop for a full mechanical &
electrical diagnosis and restoration. The fan arrives in poor condition, completely non-operational for
decades. The R&M 4312 was completely disassembled to expose the motor, rotor, stator, bearing
assemblies, oscillator components, and internal wiring. Rotor removal proved unusually difficult due to
severe binding through the bronze sleeve bearings, requiring careful extraction to avoid damage to the
original shaft, stator, and bearing housings. With the motor opened, decades of accumulated lubricant,
oxidation, and debris were exposed throughout the bearing and mechanical assemblies. Both bearing bores
and rotor shaft journals are being cleaned, inspected, and evaluated for proper running clearance before
reassembly. Original hardware and mechanical components have been retained wherever serviceable, with
preservation of the fan’s existing finish and patina remaining the priority.
Maker / Model1924 10" R&M •
Model 4312ComplaintDoesn't run at all, in poor
shape overall • Repair & Preservation
FindingFan in poor condition •
Preservation underway
Next StepFull disassembly, cleaning,
oiling, adjustment, rebuild, testing and careful hand polishing.