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Cleanroom Equipment Spare Parts
AHU Bearing
A precision deep-groove ball bearing with optional contact seals for supporting matched AHU motor or blower shafts under radial and moderate axial loads.
- Deep-Groove Raceway
- Precision Steel Balls
- Optional Contact Seals
- Matched Shaft Fit
Product Introduction
The AHU bearing is a single-row deep-groove rolling bearing selected for compatible fan motors, blower shafts or bearing cartridges. Hardened steel inner and outer rings contain one row of precision balls separated by a cage, while optional elastomer seals retain lubricant and restrict contaminant entry. The deep raceways support radial load and moderate axial load in either direction, making this construction common in rotating air-moving equipment. Replacement selection must match the original bore, outside diameter, width, internal clearance, closure arrangement, speed and fit rather than using shaft diameter as the only criterion.
Key Features
Precision-ground rings and uniformly spaced balls support stable rotation when the shaft and housing seats are correctly aligned.
Removable or factory-installed elastomer seals help retain grease and limit dust ingress in enclosed AHU service positions.
Standardized boundary dimensions simplify interchange when the complete bearing designation and clearance suffix are verified.
Customer Product Concerns
Bearing life depends on matching dimensions and internal design while preventing damage during storage, mounting, lubrication and shaft alignment.
The same bore size is available in several outside diameters, widths, clearances and closure styles.The complete designation and measured bore, outer diameter and width are checked before an interchange is selected.
An overly tight fit or impact through the wrong ring can brinell the raceway before the fan returns to service.Mounting force is applied only to the ring being fitted, using controlled tooling and the specified shaft and housing tolerances.
Open, shielded and contact-sealed bearings differ in grease retention, friction and contamination protection.The closure and lubricant arrangement are selected for the installed speed, access and cleanliness conditions.
Shaft misalignment or fan imbalance produces vibration and uneven bearing loading.The replacement is combined with shaft-seat inspection, alignment checks and verification of the rotating fan assembly.
Typical Applications
AHU fan motor shaftsBelt-driven blower bearing cartridgesCleanroom exhaust fan assembliesVentilation equipment overhaul
Technical Parameters
Typical construction and boundary ranges for compact single-row AHU deep-groove ball bearings are listed below.
| Core Material | Through-hardened chromium bearing-steel rings and balls with steel cage and optional NBR seals |
|---|---|
| Panel Thickness | 8-35 mm nominal bearing width |
| Effective Width | 10-80 mm nominal shaft bore |
| Maximum Length | Up to 170 mm nominal outside diameter for common AHU selections |
| Steel Facing Thickness | 2-18 mm radial ring section, dependent on bearing series |
| Core Density | Approximately 7810-7850 kg/m³ for chromium bearing steel |
| Thermal Conductivity | Approximately 42-46 W/(m·K) for hardened bearing steel |
| Surface Finish | Precision-ground silver race surfaces with preserved steel or dark NBR closure faces |
| Joint Type | Single-row deep-groove rolling contact with press-fit inner and outer ring seats |
| Customization | Available based on the intended application and operating environment. |
Available Options
Open, shielded or contact-sealed closureNormal or increased internal clearanceAlternative cage materialMatched bore and boundary series
Planning a AHU Bearing specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
