This is a replacement drive shaft for 36" and 48" PolarCool belt drive evaporative cooling fans that use flange bearing internal supports. If your shaft is worn, bent, or the keyways are chewed up, this is the direct-fit part you need.
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.
This shaft is cold rolled steel, cut to length with keyways already machined in for the motor and propeller pulleys. That precision matters — a shaft that's off-spec on length or keyway placement leads to pulley misalignment, belt wear, and vibration you'll be chasing for months. It's built as a direct-fit replacement for PolarCool 36" and 48" belt drive fans using flange bearing internal supports, so you're not modifying anything to make it work.
Critical Fitment & Requirements
- Diameter: 1" — Length: 7-5/8"
- Material: Cold Rolled Steel
- Fits: 36" and 48" PolarCool belt drive evaporative cooling fans with flange bearing internal supports
- Compatible flange bearings: SKU 6403-1115 and SKU 6403-1114
- Requires two shear keys, SKU 1019-2417, sold separately (not included)
- Does NOT fit PolarCool belt drive fans without flange bearing internal supports — verify your model's bearing configuration before ordering
Key Benefits
- Cold rolled steel construction for strength and durability
- Precision-cut to 1" diameter x 7-5/8" length
- Keyways machined in for secure motor and propeller pulley connection
- Direct-fit replacement — no modification needed for compatible models
- Restores reliable power transmission from motor to propeller for consistent airflow
| Spec | Value | Unit |
|---|---|---|
| Material | Cold Rolled Steel | - |
| Diameter | 1 | in |
| Length | 7-5/8 | in |
| Compatible Flange Bearings | 6403-1115, 6403-1114 | SKU |
| Required Shear Keys | 1019-2417 | SKU |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Fits: 36" and 48" PolarCool belt drive evaporative cooling fan models with flange bearing internal supports
- Fits: Warehouse cooling, outdoor cooling, and industrial air cooler applications using this shaft configuration
- Compatible with flange bearings SKU 6403-1115 and SKU 6403-1114
- Requires two shear keys, SKU 1019-2417 (sold separately) for installation
- Does NOT fit 36"/48" PolarCool models without flange bearing internal supports
- Not confirmed compatible with any non-PolarCool belt drive fan [NEEDS VERIFICATION]
| Item | Detail |
|---|---|
| Material Safety | Cold rolled steel — no coating hazard data provided [NEEDS VERIFICATION] |
| Installation Safety | Disconnect power and follow lockout/tagout procedures before installation |
| Pre-Install Inspection | Inspect keyways, pulleys, and bearings for wear or damage |
FAQ
Will this shaft fit any PolarCool 36" or 48" evaporative cooling fan?
It fits 36" and 48" PolarCool belt drive models that use flange bearing internal supports. Verify your model configuration before ordering, since not all 36"/48" units use this bearing style.
What are the exact dimensions of this shaft?
It is precision-cut cold rolled steel, 1 inch in diameter and 7-5/8 inches long, with keyways machined for motor and propeller pulley connection.
Do I need any other parts to install this shaft?
Yes. You need two shear keys, SKU 1019-2417, sold separately. The shaft is also designed to work with flange bearings SKU 6403-1115 and 6403-1114.
Does this shaft work with flange bearings other than SKU 6403-1115 and 6403-1114?
The manufacturer data confirms compatibility only with flange bearings SKU 6403-1115 and 6403-1114. Compatibility with other flange bearing part numbers is not confirmed [NEEDS VERIFICATION].
Warranty & Registration
Manufacturer warranty terms for this part were not included in the provided data. [NEEDS VERIFICATION] Refer to the "Resources (System Manuals and Warranty)" Tab above on this page for manufacturer warranty documentation. Ask us before you order if you need help confirming your bearing configuration — we always reply back.
