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Dayton 508209 steel fan guard polyester coated for 21 inch tubeaxial fan 22 5/8 bolt circle 16 depth

Dayton

Dayton 508209 Fan Guard for 21 in Tubeaxial Fan, Depth 16, Bolt Circle 22 5/8 in, for 4TM84

SKU CH-61YX-S8S0B

Steel inlet/outlet guard fits 21 in tubeaxial fans with 22 5/8 in bolt circle

  • Product typeInlet or Outlet
  • Protects 21 in tubeaxial fan with steel guard
  • Polyester coated finish resists corrosion in harsh environments
  • 22 5/8 in bolt circle matches 4TM84 mounting pattern
  • 1/2 in mounting holes simplify installation on existing frames
  • 3/16 in depth adds minimal profile to fan assembly

Dayton 508209 Fan Guard for 21 in Tubeaxial

The Dayton 508209 is a steel fan guard with a polyester-coated finish designed for 21 inch tubeaxial fans. It serves as an inlet or outlet protective screen for compatible industrial air-moving equipment. Buyers maintaining or assembling ventilation systems using the 4TM84 fan model will find this guard matches the required bolt circle.

Verify 22 5/8 in Bolt Circle

Before ordering, confirm that the existing fan uses a bolt circle diameter of 22 5/8 inches and mounting holes of 1/2 inch diameter. The guard’s overall length is 1/4 inch, so ensure adequate clearance at the mounting surface. This accessory is not suited for fans with different bolt patterns or hole sizes.

Steel Construction Withstands Continuous Airflow

The steel body and polyester coating resist deformation and corrosion during sustained operation in dusty or humid environments. Unlike plastic alternatives that may warp over time, this guard maintains its shape under constant vibration and airflow pressure. It is not intended for high-impact zones or applications requiring spark-resistant materials.

How it compares

Measured against everything we stock in Fan Motors, Parts & Clip-On Fans, at today’s prices. Recalculated every night.

Price $150.99
Pricier than about 74% of the 473 comparable items (median $38.99).

Specifications

Product
Brand nameDayton
Product typeInlet or Outlet

Questions about this item

Does the 508209 guard come with the 21 in tubeaxial fan or must the fan be bought separately?

The 508209 is a steel guard only; the 21 in tubeaxial fan is sold separately and is not included in the box.

Which version of the 508209 matches a 4TM84 fan with a 22 5/8 in bolt circle?

The 508209 is built for the 4TM84 model and its 22 5/8 in bolt circle, so this single version fits that fan directly.

How does the 16 depth figure affect airflow when the guard is mounted on the 4TM84?

The 16 depth adds only a shallow 1/4 in profile, so resistance is minimal and the 4TM84 delivers rated airflow with little pressure drop.

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