HB88509B Center Support Bearing For CHEVROLET GMC
This HB88509B center support bearing (also known as a carrier bearing or hanger bearing) provides a direct-fit replacement for the driveshaft of select Chevrolet and GMC commercial vehicles. It supports the driveshaft at the center point, reduces driveline vibration, and protects universal joints from premature wear. This bearing matches OE specification HB88509B and includes dust flingers for enhanced protection.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| DH Code | |
| Part Number | HB88509B |
| Bearing Type | Center Support Bearing |
| Inside Diameter | 1.772″ / 45.00 mm |
| Outside Diameter | 6.717″ / 170.61 mm |
| Width | 2.300″ / 58.42 mm |
| Bolt Hole Center | 7.625″ / 193.68 mm |
| Supplementary Info | with two big flingers and one small flinger |
The inside diameter of 1.772 inches (45.00 mm) is the critical fitment spec for this bearing—this determines whether the bearing seats properly on your driveshaft. The bolt hole center measurement of 7.625 inches (193.68 mm) determines whether the bracket aligns with your vehicle’s chassis mounting points.
Important: All information on this page is for reference only. Please verify OE numbers, dimensions, and vehicle fitment against your original part before ordering. Contact us for fitment confirmation.
DH Code & OE Number & Reference Numbers
DH Code:
OE Numbers:
HB88509B
Reference Numbers (Interchange):
National: HB-88509B
SKF: HB88509B
Timken: HB88509B
Vehicle Fitment
CHEVROLET: Selected models
GMC: Selected models
Fitment note: This bearing fits select Chevrolet and GMC commercial vehicles with a 45mm bearing opening. Please verify OE number, dimensions and vehicle configuration before ordering.
Product Features
- Direct OE replacement. This bearing matches OE specification HB88509B for select Chevrolet and GMC commercial vehicles.
- Heavy-duty construction. Engineered for commercial vehicle applications with robust materials to withstand heavy loads and demanding operating conditions.
- Precision-engineered fitment. Features a 45mm inside diameter for exact vehicle compatibility.
- Includes dust flingers. Comes with two big flingers and one small flinger for enhanced protection against contamination.
- Driveline support. Supports the driveshaft to ensure stability and reduce vibration during high-speed rotation.
- Universal joint protection. Helps protect the universal joint and extend its service life.
Installation Notes
- Verify fitment. Confirm this bearing matches your original bearing specifications before installation.
- Check your vehicle configuration. This bearing is designed for select Chevrolet and GMC commercial vehicles. Verify your specific model and drivetrain before ordering.
- Verify the inside diameter. This bearing is designed for a 45mm (1.772″) bearing opening. If your vehicle has a different size, this part won’t fit.
- Check dimensions. Verify the outside diameter (6.717″), width (2.300″), and bolt hole center (7.625″) against your original bearing before installation.
- Professional installation recommended. Proper alignment during installation is critical to prevent premature wear and driveline vibration issues.
About DUHUI Bearing
Manufactured by DUHUI Bearing – an automotive bearing supplier established in Zhejiang, China, in 2003. DUHUI produces center support bearings, wheel hub bearings, and related components to OE specifications. Contact us
For fitment questions, compare your old part number against the OE numbers listed above.
