The 0750117678 spindle rear support bearing is a precision component designed to provide stable, low‑friction support for rotating spindles in heavy‑duty drivetrain applications. Located at the rear of spindles in transmissions, differentials, and hub assemblies, these bearings maintain precise spindle alignment, reducing deflection and minimising wear on gears, seals, and housings. In heavy‑duty trucks, reliable spindle support is essential for smooth power transmission, reduced noise, and extended component life. A worn or damaged rear support bearing can lead to spindle misalignment, increased vibration, premature seal failure, and eventual gear damage. By installing the genuine 0750117678 spindle rear support bearing, you restore factory‑specified clearances and preload, ensuring smooth operation and maximising the service life of your drivetrain.
Superior Radial & Axial Support
Engineered to handle combined loads, maintaining spindle alignment and reducing stress on gears and seals.
Reduced Friction & Heat
Precision‑ground rollers and raceways minimise friction, improving efficiency and reducing operating temperatures.
Heavy‑Duty Durability
Manufactured from high‑grade bearing steel with advanced heat treatment for extended fatigue life.
OEM‑Exact Fit
Manufactured to Sinotruk’s original specifications – direct replacement with no modifications.
| Parameter | Specification |
|---|---|
| OEM Number | 0750117678 |
| Product Name | Spindle Rear Support Bearing |
| Brand | HOWO / Sinotruk |
| Inner Diameter (d) | 50 mm ± 0.01 mm |
| Outer Diameter (D) | 80 mm ± 0.01 mm |
| Width (B) | 22 mm ± 0.05 mm |
| Material | High‑grade bearing steel (GCr15) with heat treatment |
| Operating Temperature | -40°C to +120°C |
| Dynamic Load Rating (C) | ≥ 52.0 kN |
| Quality Standard | Original Sinotruk / HOWO OEM specification |
The 0750117678 spindle rear support bearing is used in a variety of critical drivetrain assemblies across the HOWO and Sitrak model ranges, including:
The 0750117678 spindle rear support bearing is manufactured to the highest quality standards, ensuring it outperforms generic aftermarket alternatives. Made from premium bearing steel (GCr15) and precision‑heat‑treated to achieve optimal hardness and microstructure, this bearing offers excellent wear resistance and dimensional stability. The raceways are ground to micron tolerances, ensuring smooth rotation and even load distribution. The rollers are precision‑matched to the raceways, minimising noise and vibration. Each bearing is inspected for radial clearance, roundness, and surface finish to guarantee compliance with OEM specifications. This commitment to quality translates into reliable, maintenance‑free operation, reducing downtime and extending the service life of your vehicle’s drivetrain.
Precision Grinding
Raceways and rolling elements ground to sub‑micron accuracy for smooth, quiet operation.
Advanced Heat Treatment
Optimised hardening process ensures high core toughness and surface hardness for extended fatigue life.
100% Dimensional Inspection
Every bearing is verified against OEM drawings to guarantee perfect fit and function.
Genuine OEM Quality
Built to Sinotruk’s original specifications – guaranteed performance and reliability.
Installing the 0750117678 spindle rear support bearing requires careful attention to cleanliness and proper techniques. Always refer to the appropriate workshop manual for your HOWO or Sitrak model. Ensure the housing and spindle are clean, free from burrs, and within specified tolerances. Use a suitable press or installation tool to apply force evenly to the bearing, avoiding damage to the rolling elements or cage. Apply a thin layer of clean bearing grease to the rollers and raceways before installation. After installation, verify the bearing rotates freely and that axial and radial clearances are within specification. During routine maintenance, inspect the bearing for signs of wear, corrosion, or pitting, and replace if necessary.
Choosing the 0750117678 genuine spindle rear support bearing is an investment in the long‑term reliability and performance of your HOWO or Sitrak truck. Inferior aftermarket bearings often use substandard materials, imprecise geometries, and inadequate heat treatment – leading to premature wear, noise, and catastrophic failure. By using a genuine OEM component that adheres to Sinotruk’s exacting standards, you guarantee perfect fitment, consistent load capacity, and maximum durability. Fleet operators and workshop professionals worldwide trust this bearing to maintain the integrity of their transmissions, differentials, and hub assemblies. With its proven quality and reliability, it is the definitive choice for those who demand excellence.
“We have standardised on the 0750117678 spindle rear support bearings for all our transmission and differential overhauls. The fit is perfect, the bearings run quiet, and we have seen a significant reduction in spindle‑related failures. This is the only bearing we trust for our fleet.”
The 0750117678 spindle rear support bearing is designed to fit a comprehensive range of HOWO and Sitrak heavy‑duty trucks, including the most popular models. It is a direct replacement for the original bearing fitted at the factory, ensuring a seamless swap without any modifications. Always confirm the OEM number 0750117678 on your original bearing or by cross‑referencing your vehicle’s VIN with the Sinotruk parts catalogue. For any uncertainty, consult your local HOWO or Sitrak dealer with your chassis number.
HOWO and Sitrak trucks are subjected to the most punishing environments – from extreme cold to desert heat, from constant vibration to corrosive road salts. The 0750117678 spindle rear support bearing is engineered to withstand these extremes. Its high‑grade bearing steel and precision heat treatment ensure resistance to deformation, fatigue, and wear under heavy loads and thermal cycling. The advanced lubricant retention design ensures consistent lubrication, even in high‑speed and high‑temperature conditions. This bearing is built to deliver reliable, maintenance‑free performance for the entire service life of your vehicle, reducing unplanned downtime and repair costs.
Extreme Temperature Tolerance
Reliable from -40°C to +120°C – no loss of material properties or dimensional stability.
Vibration & Impact Resistant
Robust construction withstands constant road vibrations and shock loads without premature failure.
Corrosion Protection
Advanced surface treatment provides long‑term resistance to moisture and aggressive chemicals.
High Fatigue Life
Designed for millions of cycles under rated load, meeting or exceeding OEM durability requirements.
The 0750117678 spindle rear support bearing is supplied in protective packaging to ensure safe delivery and convenient storage. Each bearing is individually wrapped in anti‑corrosion paper and sealed in a plastic bag to prevent contamination. Bulk packaging options are available for workshops, fleet depots, and OEM service centres, offering cost savings and streamlined inventory. Every pack is clearly labelled with the OEM number, product name, and key specifications for easy identification. Always verify the OEM number 0750117678 on the label before installation to ensure you are using the correct genuine component.
OEM: 0750117678 | Genuine HOWO / Sitrak Spindle Rear Support Bearing
Choose 0750117678 spindle rear support bearing – the professional‑grade precision component that delivers superior load capacity, exceptional durability, and reliable performance for your HOWO or Sitrak truck.
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