This is an 18" six-blade fiberglass propeller for PolarCool evaporative cooler units built around the Vosterman motor (SKU 3017-0050). If your existing prop is cracked, chipped, or out of balance, this is the direct replacement.
Fiberglass propellers hold up to years of continuous cycling better than stamped metal blades - they resist corrosion from the wet environment inside an evaporative cooler cabinet, and the added mass helps dampen vibration at speed. This 6-blade, 18" prop is built to a specific hub and blade geometry that matches the Vosterman 3017-0050 motor shaft, so fitment accuracy matters more than it would on a generic fan blade. 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
- Diameter: 18"
- Blade count: 6
- Material: Fiberglass
- Compatible only with the Vosterman motor, SKU 3017-0050
- Fitment applies to PolarCool models manufactured from 2014 onward
- Does NOT fit motors other than Vosterman SKU 3017-0050
- Fitment on units built before 2014 is not confirmed by manufacturer data - [NEEDS VERIFICATION]
A common failure point on replacement props is hub misalignment on the motor shaft - even a slight offset introduces vibration that loosens the set screw over time and eventually walks the blade off-center. Before final tightening, spin the prop by hand to confirm it clears the shroud on all sides, then check radial runout with a dial indicator or, at minimum, a straightedge held against the blade tip through a full rotation. Torque the hub set screw to the motor manufacturer's spec rather than "snug by feel." Always disconnect and lock out power at the disconnect before touching the shaft, consistent with standard electrical safety practice for rotating equipment service.
Key Benefits
- Fiberglass blade construction resists moisture-related degradation inside the cooler cabinet
- Six-blade design increases airflow compared to lower-count props
- Genuine PolarCool replacement part matched to Vosterman motor geometry
- Straightforward shaft-mount installation with standard hand tools
- Consistent hub fit reduces vibration-related wear on motor bearings
| Spec | Value | Unit |
|---|---|---|
| Type | Replacement Propeller | - |
| Diameter | 18 | in |
| Blade Count | 6 | blades |
| Material | Fiberglass | - |
| Compatible Motor | Vosterman, SKU 3017-0050 | - |
| Compatible Model Years | 2014 and newer | - |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Fits: PolarCool evaporative cooler models equipped with the Vosterman motor, SKU 3017-0050, manufactured from 2014 onward
- Does NOT fit: motors other than Vosterman SKU 3017-0050
- Not verified for: PolarCool models produced prior to 2014 - confirm your motor SKU before ordering
Compliance & Environment
| Item | Detail |
|---|---|
| Material Safety | Fiberglass blade construction |
| Electrical Safety | Disconnect power to the cooler before removing or installing the propeller |
FAQ
Will this wall sleeve fit a standard 42x16 cutout?
Not applicable - this is an 18" fan propeller, not a PTAC wall sleeve.
What motor does this propeller fit?
This 18" prop is designed exclusively for use with the Vosterman motor, SKU 3017-0050, on PolarCool models manufactured from 2014 onward.
How many blades does this propeller have?
It has 6 blades, designed to improve airflow and cooling efficiency compared to lower blade-count props.
What is this propeller made of?
It is made from fiberglass, chosen for durability under continuous run cycles while keeping the blade lightweight.
Will this fit a PolarCool unit made before 2014?
Manufacturer data confirms fitment for models from 2014 onward with the Vosterman 3017-0050 motor. Fitment on pre-2014 units is not confirmed - verify your motor SKU before ordering.
Can I use this propeller with a different motor brand?
No. This propeller is engineered specifically for the Vosterman motor (SKU 3017-0050). It is not intended for use with other motor brands or models.
Warranty & Registration
Manufacturer warranty terms for this component are not included in the provided data. Refer to the "Resources (System Manuals and Warranty)" Tab above for the applicable PolarCool warranty document. Ask us before you order if you need help confirming your motor SKU or model year against this part.
