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Precision tapered roller bearing for heavy‑duty drive axles – The OEM FG4003202721+998/1 T2Ed050 Tapered Roller Bearing (Yihe type) is engineered to support high radial and axial loads in SINOTRUK Homan axles, differentials, and wheel hubs. This metric bearing provides smooth rotation and extended service life. For guaranteed compatibility and performance, always choose genuine Sinotruk Homan parts.
The FG4003202721+998/1 bearing corresponds to the T2Ed050 size, with dimensions 50 mm inner bore, 90 mm outer diameter, and 25 mm width. It is manufactured from vacuum‑degassed 100Cr6 (AISI 52100) steel, heat‑treated to 60‑64 HRC, and precision ground to ISO 492 class P6.
The FG4003202721+998/1 bearing, designated as T2Ed050 in the Yihe axle system, is a single‑row tapered roller bearing optimised for heavy‑truck applications. Its tapered geometry ensures pure rolling contact between rollers and raceways, minimising friction and wear while supporting combined radial and axial loads. This bearing is commonly used in differential pinion supports, wheel hubs, and transmission shafts.
Manufactured from vacuum‑degassed 100Cr6 bearing steel, the bearing rings and rollers achieve a uniform hardness of 60‑64 HRC after controlled heat treatment. The raceways are superfinished to a mirror‑like finish (Ra ≤ 0.1 μm), reducing operating temperature and improving fatigue life. A pressed steel cage maintains precise roller spacing and low rotational drag.
Genuine SINOTRUK Homan FG4003202721+998/1 bearings are 100% tested for radial runout (≤0.015 mm), internal clearance (C3 standard), and noise (SQF grade V2). They far exceed the performance of generic replacements, delivering reliable service for over 800,000 km in typical line‑haul applications.
Dynamic load rating (C) 72 kN, static rating (C0) 98 kN. Ideal for differentials and wheel ends.
ISO 492 class P6 (P5 optional). Radial runout ≤ 0.015 mm ensures quiet, vibration‑free operation.
Direct replacement for Yihe axle T2Ed050 bearing. Matches Original Equipment dimensions and internal clearance.
| OEM Number | FG4003202721+998/1 |
| Product Name | T2Ed050 Tapered Roller Bearing (Yihe axle type) |
| Brand | SINOTRUK Homan |
| Bore Diameter (d) | 50 mm |
| Outer Diameter (D) | 90 mm |
| Width (T – total) | 25 mm |
| Cone Width (B) | 25 mm |
| Dynamic Load Rating (C) | 72 kN (16,200 lbf) |
| Static Load Rating (C0) | 98 kN (22,000 lbf) |
| Limiting Speed (grease) | 4300 rpm |
| Material | Vacuum‑degassed 100Cr6 (AISI 52100) |
| Hardness | 60‑64 HRC (through‑hardened) |
| Cage Material | Pressed steel (stamped) |
| Tolerance Class | ISO 492 P6 (standard) / P5 available |
| Radial Runout (max) | 0.015 mm |
| Internal Clearance | C3 (standard) |
| Applications | Differential pinion, wheel hubs (Yihe axles), transmission shafts |
| Compatible Axles | SINOTRUK HOWO, A7, T7H, C7H with Yihe differentials |
The FG4003202721+998/1 bearing is produced on high‑speed CNC grinding lines that maintain sub‑micron accuracy. The raceways are ground and then honed to a superfinish, reducing friction and allowing the bearing to run cooler even at high speeds. The rollers are sorted into micro‑grade batches to ensure uniform diameters within 0.5 μm, guaranteeing even load distribution.
The pressed steel cage is heat‑treated and shot‑peened to increase fatigue resistance. Each bearing is 100% inspected for radial clearance, axial runout, and acoustic noise (SQF level V2 or better). The result is a bearing that operates almost silently and maintains its preload for the life of the axle.
For Yihe axles, the T2Ed050 bearing is typically installed as part of a matched pair (inner and outer) on the differential carrier or wheel hub. The tapered design allows easy adjustment of end‑play or preload using shims or a slotted nut. Genuine SINOTRUK Homan bearings maintain consistent preload even after thousands of thermal cycles.
The 100Cr6 steel is vacuum‑degassed to remove oxygen and sulfur, eliminating almost all non‑metallic inclusions that cause spalling. After forging, the rings are spheroidize‑annealed, then hardened and tempered to produce a fine martensitic microstructure with less than 3% retained austenite. This ensures dimensional stability under load and excellent rolling contact fatigue resistance.
A light rust‑preventive oil is applied to the bearing for storage. Before installation, the bearing should be cleaned and packed with high‑quality NLGI #2 wheel bearing grease or differential oil, depending on the application.
The FG4003202721+998/1 bearing is a direct replacement for the original Yihe T2Ed050 bearing in SINOTRUK Homan axles. The cone and cup must be kept together as a matched set – never mix components from different bearings. Installation requires a hydraulic press: press the cone onto the shaft, and the cup into the housing, applying force only to the interference‑fit ring. Never hammer directly.
Preload for wheel hub applications is set by torquing the spindle nut to a high value (200 Nm) while rotating, then backing off and retorquing to a lower specification (40‑60 Nm) plus a 45‑60° angle. Measure rotational torque at the hub flange; it should be 0.6‑1.2 Nm for new bearings.
1) Clean the shaft and housing bore thoroughly; remove burrs or old sealant. 2) Press the new bearing cone onto the shaft using a press sleeve that contacts the inner ring face only. 3) Press the cup into the housing using a sleeve on the outer ring face.
4) Apply a thin coat of grease to the roller ends and raceways. 5) Assemble the shaft/hub into the housing, then adjust preload using shims or a locking nut. Measure rotating torque with a spring gauge.
6) Install a new seal, fill with lubricant, and run the assembly at low speed to check for noise. 7) Verify that bearing temperature stays below 80°C after one hour of operation.
The FG4003202721+998/1 bearing is maintenance‑free if properly installed and lubricated. Inspect for excessive end‑play or noise every 50,000 km. Metallic debris on a magnetic drain plug indicates bearing spalling; replace the bearing immediately.
Common failure causes: over‑preloading (overheating), under‑preloading (shock loads), water ingress (rusted raceways), or contamination (pitted rollers). Always replace both cup and cone as a set, and replace the seal at the same time. Never reuse a bearing that has been removed – the rollers and raceways will have taken a permanent set.
The FG4003202721+998/1 bearing is manufactured under IATF 16949 and ISO 9001:2015 quality systems. Each bearing is 100% inspected for dimensions (CMM), radial runout, and acoustic noise (SQF). Random samples undergo endurance life testing (L10 > 5000 hours at rated load), debris contamination testing (500 hours with 50 μm dust), and corrosion testing (240h salt spray).
The bearing meets or exceeds ISO 355 (metric tapered roller bearing dimensions) and ISO 492 (tolerances). A laser‑etched batch code on the outer ring provides full traceability. Counterfeit bearings often have incorrect dimensions, poor surface finish, or no brand marking. Always purchase from authorized SINOTRUK Homan distributors and verify the QR code on the packaging.
A fleet of 350 SINOTRUK HOWO trucks with Yihe axles in Brazil (poor road conditions, high humidity) switched to genuine T2Ed050 bearings. Over 2 years, differential and hub failures dropped by 75%, and bearing life increased from 250,000 km to over 600,000 km. The fleet reported reduced downtime and lower maintenance costs.
Another user – a mining company in West Africa – replaced aftermarket bearings with FG4003202721+998/1 on 100 dump trucks. After 18 months, no bearing‑related axle failures were recorded, whereas previously failures occurred every 4 months. The genuine bearings withstood severe dust and high ambient temperatures.
Each genuine FG4003202721+998/1 bearing is packed in a sealed plastic bag with a desiccant, then placed in a heavy‑duty carton with foam inserts. The box includes a QR code and a holographic seal. The bearing itself has the SINOTRUK Homan logo and the size etched on the outer ring.
Counterfeit bearings often have a poor surface finish, mismatched cone/cup numbers, or a rusty appearance. The genuine bearing rotates silently with a smooth, consistent drag. Always scan the QR code to verify authenticity on the SINOTRUK Homan portal. Using a fake bearing can lead to catastrophic drivetrain failure and void the vehicle warranty.
Summary: The SINOTRUK Homan T2Ed050 Tapered Roller Bearing (OEM FG4003202721+998/1) delivers high load capacity, precision tolerances, and long service life for Yihe axles. Ensure reliable drivetrain performance – choose this genuine component trusted by fleets and mechanics worldwide.
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