Step 1) Identify the part number from the label on the wheel (See Blower Wheel Label Decoder below). If label is not legible or does not exist then move to Step 2.
Blower Wheel Label Decoder:
- The environment will damage a blower wheel label so that it’s no longer legible. No two labels will be alike – OEM’s have their own requirements for what information must be included on their supplier’s labels.
- If you’re lucky and can read the label then the following examples might help to improve your experience when attempting to shop or sell replacement blower wheels.
Step 2) Identify the following characteristics then move to Step 3:
- If the blades appear to be individually inserted in the ring and back then you have a tablock wheel. If the wheel appears to be made from a strip of material, rolled onto the back and ring of the blower wheel then you have a strip wheel
- Measure the diameter of the blower wheel – the longest distance from one side of the ring to the other side.
- Measure the total length of the blades with the ring and back included
Single or Double Inlet:
- A blower wheel with one side is single inlet; if it has two sides it’s double inlet
- For Single Inlet wheels you need to view the closed end of the wheel
- For Double Inlet wheels you need to view the hub
- From the appropriate perspective described above you will see the wheel is spinning clockwise (CW) or counter clockwise (CCW).
Wheel Bore Size:
- Is the same as the diameter of the shaft
Wheel Hub Position:
- For Single Inlet, the hub can either be on the “inside” or “outside” of the wheel
- For Double Inlet, the disc can either be in the “center” of the wheel or “off center”
- Wheels are made from Plastic, Aluminum or Galvanized material. It’s important to replace wheels with the like material; you’d never want to replace aluminum with Galvanized.
- To tell the difference between aluminum and steel, try scratching the metal with a car key. Aluminum will scratch pretty easily where as steel will not.
Wheel Blade Count:
- The number of blades on a wheel has a significant impact on the amount of air that the wheel will produce so it’s very important to replace a wheel with another wheel that has the same number of blades.
- A strip wheel will have anywhere between 20 and 40 blades
- A tab lock wheel will have anywhere between 24 and 64 blades
- A backward incline wheel may be welded or tab lock and will have anywhere between 7 and 11 blades
- The motor RPM is essential in determining what blower wheel should be used in the application. A wheel will:
- fail in an application if the RPM is higher then what the wheel was built to withstand.
- perform if the RPM is less then what it was designed for but then the application will not receive the optimum amount of airflow that the application was designed to deliver.
Step 3) Contact your preferred distributor or wholesaler for price and availability.
An OEM will often qualify multiple blower wheels for each application even though they will only use one for production. If you cannot source the exact part that you’re replacing then Revcor will be pleased to help you identify the like part that was qualified by the OEM.
For Revcor support contact Revcor Customer Service (800-323-8261 Ext 311).