This is a direct-fit motor pulley for 48" Polar Cool evaporative coolers running on 240V, 60Hz, single-speed (toggle switch on/off) motors. If your cooler's pulley is worn, cracked, or slipping and it uses motor SKU 3017-3080, this is the replacement part.
This pulley is engineered for 48" Polar Cool evaporative coolers used in warehouse cooling, outdoor cooling setups, and other heavy-duty swamp cooler applications. Matching the pulley spec exactly matters here — an incorrect pulley diameter or bore will throw off belt tension and starve the propeller of proper drive speed, cutting airflow output. 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
- Pulley type: AK 41x5/8
- Voltage: 240V (230V), Frequency: 60Hz
- Fits 48" Polar Cool single-speed (toggle switch on/off) evaporative cooling fans
- Compatible motor: SKU 3017-3080
- Compatible shear key (if replacement needed): SKU 1019-2417
- Does NOT fit 50Hz motors — use SKU 1011-2647 for that application instead
- Not intended for two-speed models or motors other than SKU 3017-3080
A pulley that looks fine but has a hairline crack near the hub is the most common cause of a mid-season belt failure — the crack propagates under load and lets the pulley walk on the shaft, chewing up the keyway. Before you bolt the new pulley on, back off the old set screw and shear key, then inspect the motor shaft for scoring; a scored shaft will cause the same slippage problem again even with a new pulley. Use a dial or torpedo level to confirm the pulley face runs true and parallel to the propeller pulley before you tension the belt — an out-of-plane pulley induces vibration that loosens sheet metal fasteners over time and shortens belt life. Follow the OEM torque spec on the set screw and shear key SKU 1019-2417 if replacing it, and always disconnect power and lock out/tag out the unit per standard electrical safety practice before you touch the drive assembly.
Key Benefits
- Direct-fit replacement — no drilling, adapting, or modification needed for the specified motor/fan combination
- AK 41x5/8 spec matches OEM power transmission characteristics for consistent airflow
- Durable construction intended to resist wear in industrial and outdoor cooling environments
- Simplifies maintenance turnaround for facilities managing 48" Polar Cool cooling equipment
- Pairs with shear key SKU 1019-2417 for a complete drive-hub service
| Spec | Value | Unit |
|---|---|---|
| Pulley Type | AK 41x5/8 | — |
| Voltage | 240 (230) | V |
| Frequency | 60 | Hz |
| Compatible Fan Size | 48 | in |
| Compatible Motor SKU | 3017-3080 | — |
| Compatible Shear Key SKU | 1019-2417 | — |
| 50Hz Alternative SKU | 1011-2647 | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Fits: 48" Polar Cool evaporative cooling fans, 240V (230V), 60Hz, single-speed (toggle switch on/off) operation, with motor SKU 3017-3080
- Compatible with shear key SKU 1019-2417 for hub replacement
- NOT compatible with 50Hz motors — use SKU 1011-2647 instead
- NOT intended for two-speed or variable-speed fan models outside the stated single-speed spec
| Item | Guidance |
|---|---|
| Electrical Safety | Disconnect power and follow lockout/tagout procedures before installation |
| Pre-Install Inspection | Inspect pulley for damage, wear, or cracks before installation; replace if defects are present |
| Mounting | Ensure pulley is securely mounted to prevent slippage and power transmission loss |
| Post-Install Check | Check belt tension and alignment after installation; test fan operation to confirm proper airflow |
FAQ
Will this pulley fit my 48" Polar Cool cooler?
It fits 48" Polar Cool evaporative cooling fans running 240V (230V), 60Hz, single-speed (toggle switch on/off) motors, specifically motor SKU 3017-3080. It does not fit 50Hz motors or two-speed models outside this specification.
What is the pulley specification?
This pulley is built to AK 41x5/8 specification for reliable power transmission between the motor and propeller.
What if I have a 50Hz motor instead of 60Hz?
This pulley (1011-2650) is for 60Hz motors only. For 50Hz motors, use SKU 1011-2647 instead.
Do I need to replace the shear key too?
Only if the existing shear key is damaged or worn. This pulley is compatible with shear key SKU 1019-2417 if a replacement is needed.
Is this a genuine Polar Cool part?
Yes. This is a genuine Polar Cool replacement motor pulley, direct-fit for the specified 48" 240V 60Hz single-speed models.
Warranty & Registration
Manufacturer warranty terms for this part are not detailed in the source data provided. [NEEDS VERIFICATION] Refer to the "Resources (System Manuals and Warranty)" Tab above on this page for the manufacturer's warranty documentation before purchase. Ask us before you order if you need help confirming coverage for your specific unit.
