HM89443/10 Wheel Bearing For TOYOTA
The DUHUI Bearing HM89443/10 wheel bearing is an inch-series single-row tapered roller bearing assembly consisting of an HM89443 cone (inner ring) and an HM89410 cup (outer ring). With a 33.338 mm bore, 76.2 mm outer diameter, and 29.37 mm total width, this bearing is a critical component for Toyota differentials, where it is used as an outer pinion bearing . It matches Toyota OE specification HM89443/10 and is cross-referenced with Koyo HM89443/10, Timken HM89443/HM89410, and NTN 4T-HM89443/HM89410.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| DH Code | DWB2558 |
| Part Number | HM89443/10 |
| Product Type | Tapered Roller Bearing – Single Row, Inch Series |
| Bore Diameter (d) | 33.34 mm (1.312 inch) |
| Outer Diameter (D) | 76.20 mm (3.000 inch) |
| Total Width (T) | 29.37 mm (1.157 inch) |
| Cone Width (B) | 28.58 mm (1.125 inch) |
| Cup Width (C) | 23.02 mm (0.906 inch) |
| Cone Number | HM89443 |
| Cup Number | HM89410 |
| Dynamic Load Rating (Cr) | 99.5 kN (22,370 lbf) |
| Static Load Rating (C0r) | 107.0 kN (24,050 lbf) |
| Fatigue Load Limit (Cu) | 15.2 kN (3,420 lbf) |
| Grease Limit Speed | 5,400 rpm |
| Oil Limit Speed | 7,200 rpm |
| ISO Factor e | 0.55 |
| ISO Factor Y1 | 1.10 |
| ISO Factor Y0 | 0.60 |
| Material | High Carbon Chrome Steel (GCr15) |
| Weight | 0.66 kg (1.46 lb) |
Note: Dimensional and load data is based on Koyo published specifications for the HM89443/10 series . Please verify measurements against your original bearing before ordering .
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 Numbers & Reference Numbers
DH Code: DWB2558
OE Numbers:
HM89443/10
Reference Numbers (Interchange):
Koyo: HM89443/10
Timken: HM89443/HM89410
NTN: 4T-HM89443/HM89410
PFI: HM89443/10
Vehicle Fitment
TOYOTA: Differential applications (verify OE number and dimensions before ordering)
This bearing is used as the outer pinion bearing in compatible Toyota differentials, including but not limited to late-model (1999 1/2-2010) vehicles with 9.75″ ring gear differentials .
Please verify OE number, dimensions and vehicle configuration before ordering.
Product Features
- Single-row tapered roller design supports combined radial and axial loads – suitable for differential pinion applications where precise load distribution is critical.
- Inch-series configuration with 33.338 mm bore and 76.2 mm outer diameter matches Koyo HM89443/10, Timken HM89443/HM89410, and NTN 4T-HM89443/HM89410 equivalents for direct replacement.
- Separable cup and cone construction (HM89443 cone / HM89410 cup) simplifies installation and maintenance – inner ring with roller assembly can be mounted independently.
- Heat-treated bearing steel with precision-ground raceways – rated for 99.5 kN dynamic load and 107 kN static load for demanding differential applications .
- Operating temperature range supports heavy-duty drivetrain conditions with grease and oil limit speeds of 5,400 rpm and 7,200 rpm respectively .
- Cross-referenced with Toyota OE HM89443/10 – confirmed interchange available.
Installation Notes
- Confirm bore diameter (33.338 mm) and outer diameter (76.20 mm) match your existing bearing and housing before installation.
- This bearing is a combination of cone (HM89443) and cup (HM89410) – the cone includes the inner ring with cage and roller set, while the cup is the outer ring.
- Inspect the shaft and housing for wear or damage – replace if scoring or pitting is present.
- When used as a differential pinion bearing, proper preload is critical for correct ring gear backlash and bearing life.
- Single-row tapered roller bearings must be mounted in mirror-image arrangement with a second tapered roller bearing to accommodate axial loads in both directions.
- Lubricate with high-quality gear oil meeting Toyota specifications – refer to the vehicle service manual for viscosity grade and lubrication method.
About DUHUI Bearing
Manufactured by DUHUI Bearing – an automotive bearing supplier established in Zhejiang, China, in 2003. DUHUI produces tapered roller bearings and automotive components to OE specifications. Contact us
