This is a replacement front-flange bearing mount for older PolarCool belt drive evaporative cooler fans. If your 36" or select 48" fan is vibrating, wobbling, or making noise at the motor end, a worn flange bearing is a common cause, and this part is the fix.
The front-flange bearing mount supports the motor and pulley alignment on belt drive evaporative cooler fans. Misalignment or a worn bearing here shows up as vibration, belt wear, and eventually motor strain, so replacing it at the first sign of play protects the rest of the drive assembly. Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
Critical Fitment & Requirements
- Fits older model 36" belt drive fans (Single Speed).
- Fits select 48" belt drive fan models (specific models not enumerated by manufacturer).
- Front-flange mount only — this is not a rear bearing assembly.
- Does NOT have confirmed compatibility with current-production 36" or 48" fan lines. [NEEDS VERIFICATION]
- Does NOT fit fan models outside the 36" Single Speed and select 48" range listed by the manufacturer.
Key Benefits
- Genuine PolarCool replacement component built to OEM fit for listed models.
- Durable construction intended for continuous-use belt drive fan operation.
- Stabilizes motor and pulley alignment for smoother airflow performance.
- Straightforward bolt-in replacement — no professional install required.
| Spec | Value | Unit |
|---|---|---|
| Part Number | 6403-1115 | - |
| Type | Replacement Front-Flange Bearing Mount | - |
| Compatible Fan Size | 36 (older model, Single Speed) | inches |
| Compatible Fan Size | 48 (select models) | inches |
| Price | 96.00 | USD |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Compatible with: older model 36" belt drive fans (Single Speed) and select 48" PolarCool belt drive fan models.
- NOT compatible with: current-production 36"/48" fan lines unless verified against your unit's existing bearing mount. [NEEDS VERIFICATION]
- NOT a rear bearing assembly — front-flange mount position only.
| Category | Detail |
|---|---|
| Material Safety | [NEEDS VERIFICATION] — material composition not specified in manufacturer data |
| Weight Capacity | [NEEDS VERIFICATION] — not specified in manufacturer data |
| Installation Safety | Disconnect power to the fan before beginning any work |
FAQ
Will this bearing mount fit my current-model 36" fan?
This mount is designed for older model 36" belt drive fans, not necessarily current-production units. Confirm your fan's model and age before ordering. [NEEDS VERIFICATION] for newer production runs.
Does this fit all 48" PolarCool fans?
No. It fits only select 48" models. PolarCool does not specify which 48" models beyond "select," so check your existing bearing mount dimensions against this part before ordering.
Is this a front or rear bearing assembly?
This is the front-flange bearing mount, located at the motor/pulley end of the belt drive fan assembly.
Can I install this myself?
Yes. Installation involves disconnecting power, removing the old bearing assembly, and installing and securing the new mount. No professional certification is required, but always de-energize the fan first.
Warranty & Registration
Manufacturer warranty terms for this part are not detailed in the available manufacturer data. Please refer to the "Resources (System Manuals and Warranty)" Tab above on this page for warranty coverage and registration steps. Ask us before you order if you need confirmation on warranty terms for your specific fan model — we always reply back.
