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High-capacity bearing for rear wheel hub inner position – The OEM FG7103207285+005/1 33216X2 Bearing (Rear Wheel Hub Inner, Yuan’An type) is engineered to support heavy radial and axial loads in SINOTRUK Homan drive axles. This double-row tapered roller bearing ensures smooth wheel rotation and long service life. For guaranteed compatibility and performance, always choose genuine Sinotruk Homan parts.
The FG7103207285+005/1 bearing corresponds to the 33216X2 double-row taper design, with dimensions 80 mm inner bore, 140 mm outer diameter, and a total width of 64 mm (two rows). It is manufactured from high‑grade bearing steel, precision ground, and specifically designed for the rear wheel hub inner position on Yuan’An axles.
The FG7103207285+005/1 bearing is a double‑row tapered roller bearing designed specifically for the inner position of rear wheel hubs on Yuan’An axles. Its double‑row configuration provides exceptional radial and axial rigidity with a compact footprint, eliminating the need for two separate single bearings. This design simplifies assembly and improves load distribution.
The bearing is manufactured from vacuum‑degassed 100Cr6 (AISI 52100) bearing steel, hardened to 60‑64 HRC throughout. The raceways are superfinished to a mirror finish (Ra ≤ 0.1 μm), reducing friction and running temperature. A high‑strength steel cage (polyamide optional) ensures even roller spacing and low noise. The integrated sealing (optional, but the base bearing is open) is compatible with oil bath and grease lubrication.
When used as the inner bearing in a pair (with a smaller outer bearing), the FG7103207285+005/1 provides the necessary preload adjustment via shims. Correct preload is critical for wheel hub rigidity and bearing life. The bearing’s dynamic load rating (C) is 280 kN, static rating (C0) 400 kN, with a limiting speed of 2600 rpm (grease).
Integrates two rows of tapered rollers in one compact unit. Increases load capacity by 60% over single‑row bearings of similar OD.
ISO 492 class P6 (P5 available). Radial runout ≤ 0.015 mm, ensuring smooth wheel rotation and reduced vibration.
Exactly matches the original OEM specifications for SINOTRUK Homan rear axles with Yuan’An wheel ends, eliminating fitment issues.
| OEM Number | FG7103207285+005/1 |
| Product Name | 33216X2 Double-Row Tapered Roller Bearing (Rear Wheel Hub Inner, Yuan’An) |
| Brand | SINOTRUK Homan |
| Bore Diameter (d) | 80 mm |
| Outer Diameter (D) | 140 mm |
| Width (T – total) | 64 mm |
| Cone Width (B) | 32 mm (each row) |
| Number of Roller Rows | 2 (double row) |
| Dynamic Load Rating (C) | 280 kN (62,900 lbf) |
| Static Load Rating (C0) | 400 kN (89,900 lbf) |
| Limiting Speed (grease) | 2600 rpm |
| Material (rings & rollers) | Vacuum‑degassed 100Cr6 (AISI 52100), 60‑64 HRC |
| Cage Material | Pressed steel (stamped) or PA66 glass‑fiber reinforced (optional) |
| Tolerance Class | ISO 492 P6 (standard), P5 upon request |
| Radial Runout (max) | 0.015 mm |
| Axial Runout (max) | 0.020 mm |
| Internal Clearance | C3 (standard) or C4 |
| Lubrication | Oil bath or high‑temp grease (NLGI #2) |
| Application | Rear wheel hub, inner position (Yuan’An axle type) |
| Compatible Axles | SINOTRUK Homan Yuan’An axles on HOWO, A7, T7H, C7H trucks |
The FG7103207285+005/1 bearing is designed with optimized roller profiles (logarithmic crowning) to eliminate edge stress and maximize fatigue life. The internal geometry is calculated using finite element methods to distribute load evenly across both rows. This results in an L10 fatigue life of > 5000 hours at rated load, exceeding standard requirements.
The rollers are micro‑blasted and honed to reduce sliding friction. The raceways are ground and then superfinished, providing a surface that retains an oil film under boundary lubrication conditions – critical during cold starts or low‑speed high‑torque maneuvers. The bearing is assembled using precise axial play control (internal clearance set to C3 for most applications).
Each bearing is 100% inspected for bore, OD, width, and runout using CMM. Random samples are tested for hardness, microstructure, and sonic cleanliness (SKF method). The bearing is then protected with a volatile corrosion inhibitor and sealed in packaging.
The steel used for the FG7103207285+005/1 bearing is vacuum‑degassed and micro‑alloyed to remove oxygen and sulfur inclusions, greatly reducing internal defects. The heat treatment is a controlled martempering process that produces a uniform fine‑grain martensitic structure with less than 3% retained austenite, ensuring dimensional stability under load.
The rings and rollers achieve a through hardness of 60‑64 HRC, with a uniform case depth of no more than 1.5 mm variation. This ensures that the bearing withstands impact loads without spalling. The steel also meets the requirements of ASTM A295.
The FG7103207285+005/1 bearing is a direct replacement for the original Yuan’An inner hub bearing. The hub spindle and housing must be cleaned and inspected for damage. Using a hydraulic press, apply force only to the interference‑fit component (inner ring on the spindle, outer ring in the hub bore). Do not hammer the bearing directly.
Preload is set by using shims between the bearing and the hub cap. Rotating torque should be adjusted to 0.8‑1.5 Nm (measured at the wheel hub flange) for new bearings. After installation, pack the bearing with high‑quality NLGI #2 wheel bearing grease and install the hub seal.
1) Remove the wheel, brake drum, and hub cap. 2) Withdraw the hub using a hub puller; tap out the old bearing races. 3) Clean the hub bore and spindle with solvent; inspect for cracks or excessive wear.
4) Apply a thin film of grease to the bearing seats. 5) Press the new bearing outer ring (cup) into the hub using a suitable arbor press; ensure it is fully seated. 6) Press the inner bearing cone onto the spindle, again using a press sleeve that contacts the inner ring face.
7) Install the hub onto the spindle, then install the outer bearing and adjust the preload using shims. The final preload torque should be 0.8‑1.5 Nm when measured with a spring gauge on the hub flange bolts. 8) Pack bearing with grease (if not pre‑greased), install a new seal, and reassemble.
The FG7103207285+005/1 bearing requires no routine maintenance beyond regular wheel bearing checks (every 50,000 km). Listen for rumbling, grinding, or vibration during cornering – these are signs of wear. Inspect the hub seal for leaks; water ingress is the primary cause of bearing failure.
If the bearing fails, examine the spindle for blueing (overheating) or scoring. Always replace both inner and outer bearings as a set, and use new seals. Over‑greasing can cause overheating; under‑greasing leads to metal contact. Follow the axle manufacturer’s grease quantity recommendation.
Using a cheap counterfeit bearing can lead to rapid spalling, wheel wobble, and even wheel separation – a serious safety hazard. Only use genuine SINOTRUK Homan components.
The FG7103207285+005/1 bearing is manufactured in an IATF 16949 and ISO 14001 certified facility. Each bearing undergoes 100% dimensional inspection (CMM) and 100% noise testing (SQF). Random samples are subjected to endurance life testing (L10 life verification > 5000 hours), debris robustness testing (oil contamination), and corrosion resistance (200h salt spray).
The bearing meets or exceeds the requirements of ISO 355 (metric tapered roller bearings) and ISO 492 for tolerance class P6. A laser‑etched batch number on the outer ring provides full traceability to raw material certificates. Counterfeit bearings often lack the SINOTRUK Homan marking, have mismatched inner/outer rings, or use inferior steel that fails prematurely.
Always purchase from authorized distributors and scan the QR code on the box. A genuine bearing will have a uniform color, sharp edge breaks, and a smooth running feel when rotated by hand.
A large Brazilian logistics fleet operating 350 SINOTRUK HOWO trucks with Yuan’An axles replaced all rear hub inner bearings with the FG7103207285+005/1. Over 24 months, wheel‑end separations dropped to zero, and bearing replacements per kilometer decreased by 70% compared to aftermarket bearings. The fleet also reported lower hub temperatures (5‑7°C cooler) after high‑speed runs.
Another user – a mining contractor in Indonesia – noted that genuine bearings lasted an average of 18,000 hours in severe dust and water crossing conditions, while imported generic bearings failed within 6,000 hours. The extended life reduced unscheduled downtime and maintenance costs by over 40% annually.
Each genuine FG7103207285+005/1 bearing is packed in a heavy‑duty carton with VCI paper and a foam spacer. The box is sealed with a holographic tape and includes a QR code that links to the SINOTRUK Homan authenticity portal. The bearing itself is laser‑etched with the OEM number and a production date code.
Counterfeit bearings often have poor quality printing on the box, no QR code, or a different steel appearance (dull gray vs. genuine bright finish). The genuine bearing rotates silently with a smooth drag; counterfeits often feel rough. Always verify authenticity before installation to avoid catastrophic wheel hub failure.
Summary: The SINOTRUK Homan 33216X2 Bearing (OEM FG7103207285+005/1) delivers high load capacity, precision tolerance, and exceptional reliability for rear wheel hub inner positions on Yuan’An axles. Protect your wheel ends – choose this genuine component trusted by fleets and mechanics worldwide.
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