This is a replacement motor pulley for 48" Polar Cool evaporative coolers running on 240V, 50Hz single-speed (toggle switch) motors. If your cooler's pulley is worn, cracked, or slipping and you're on a 50Hz electrical system, this is the direct-fit part to check.
This AK 45x5/8 pulley is built as a genuine Polar Cool replacement component for 48" evaporative coolers running on 50Hz power. It handles the mechanical link between the motor and propeller, and a worn or cracked pulley here is a common cause of weak airflow or slipping belts on these units. 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
- Type: AK 45x5/8 pulley specification
- Voltage: 240V (230V)
- Frequency: 50Hz only
- Fits: 48" Polar Cool single-speed (toggle switch on/off) evaporative cooling fans with 50Hz motors
- Does NOT fit 60Hz motors — use SKU 1011-2650 for those units instead
- Compatible shear key (if replacement is needed): SKU 1019-2417
Key Benefits
- Direct-fit replacement designed specifically for 48" 240V 50Hz Polar Cool fans
- Genuine Polar Cool replacement component, not a generic substitute
- AK 45x5/8 spec supports reliable power transmission between motor and propeller
- Durable construction intended for industrial and outdoor cooling duty cycles
- Simplifies service — swap-in replacement reduces maintenance downtime
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Type | AK 45x5/8 | - |
| Voltage | 240 (230) | V |
| Frequency | 50 | Hz |
| Fan Size | 48 | in |
| Compatible Shear Key SKU | 1019-2417 | - |
| 60Hz Alternative SKU | 1011-2650 | - |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Fits: 48" Polar Cool evaporative cooling fans, 240V (230V), 50Hz motors, single-speed (toggle switch on/off) operation
- Does NOT fit: 60Hz motor fans — use SKU 1011-2650 for those instead
- Pairs with shear key SKU 1019-2417 if that component also needs replacement
Compliance & Environment Table
| Item | Guidance |
|---|---|
| Electrical Safety | Disconnect power and follow lockout/tagout procedures before installation |
| Pre-Install Inspection | Inspect pulley for damage, wear, or cracks; replace if defects are present |
| Post-Install Check | Check belt tension and alignment after installation |
FAQ
Does this pulley fit 60Hz motors?
No. This pulley (1011-2647) is built for 50Hz fans only. For 60Hz motors, use SKU 1011-2650 instead.
What voltage and frequency is this pulley rated for?
It's rated for 240V (230V) at 50Hz, designed for single-speed (toggle switch on/off) Polar Cool motors.
What size fan does this pulley fit?
It's a direct-fit replacement for 48" Polar Cool evaporative cooling fans with 50Hz motors.
Do I need a new shear key with this pulley?
Not necessarily. If your existing shear key is in good condition, reuse it. If it needs replacement, use compatible shear key SKU 1019-2417.
Will this work with variable-speed fan models?
This pulley is designed specifically for single-speed (toggle switch on/off) models. Compatibility with variable-speed controls is not specified by the manufacturer; confirm your model type before ordering.
Warranty & Registration
Manufacturer warranty terms for this pulley are not included in the provided specifications. [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 coverage for your specific fan model.
