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Protecting rotating shafts from wear and corrosion is essential for maintaining driveline reliability in heavy-duty trucks. The Sinotruk howo parts catalog includes the high-quality 501218721 Shaft Sleeve (0501.217.795), a precision-engineered chassis component designed to provide a durable, wear-resistant surface for shafts, bearings, and seals in SINOTRUK HOWO trucks. This genuine OEM sleeve ensures that critical driveline components operate with reduced friction, minimal wear, and extended service life, even under the most demanding operating conditions.
The 501218721 shaft sleeve is manufactured from high-strength alloy steel with specialized heat treatment, providing excellent wear resistance and dimensional stability. Whether you are operating in extreme temperatures, hauling heavy loads, or navigating rough terrain, this sleeve delivers the durability and performance that professional drivers and fleet operators expect from SINOTRUK HOWO components.
For workshop technicians, fleet maintenance professionals, and owner-operators, understanding the critical role of this shaft sleeve (OEM 501218721 / 0501.217.795) is essential for preventing shaft scoring, seal leakage, and premature bearing failure, thereby reducing unscheduled downtime and extending component life.
Shaft Sleeve
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The 501218721 Shaft Sleeve (also referenced as 0501.217.795) is a precision-machined cylindrical component designed to fit over rotating shafts, providing a hardened, wear-resistant surface that protects the underlying shaft from abrasion, fretting, and corrosion. This sleeve is commonly used in transmission output shafts, axle pinion shafts, and power take-off (PTO) assemblies where high loads and relative motion occur.
Manufactured from high-grade alloy steel with a controlled induction-hardening process, the 501218721 sleeve achieves a surface hardness of HRC 55–60, ensuring excellent resistance to galling and wear. The internal bore and external diameter are ground to precise tolerances, guaranteeing a snug interference fit with mating shafts and proper alignment with seals and bearings.
Designed as a direct OEM replacement, the 501218721 ensures that your HOWO chassis retains its factory shaft-to-bore clearances, preventing premature seal failure, bearing overload, and shaft scoring. The sleeve’s surface finish is optimized to provide an ideal running surface for lip seals and bushings, effectively containing lubricants and excluding contaminants.
With the 501218721, SINOTRUK HOWO delivers a new standard of reliability for critical shaft protection. Every unit is inspected for dimensional accuracy, surface finish, and hardness consistency, ensuring that each sleeve provides dependable protection and contributes to the overall durability of the driveline system.
| Parameter | Specification |
|---|---|
| Product Name | Shaft Sleeve |
| OEM Number | 501218721 (0501.217.795) |
| Brand | SINOTRUK HOWO |
| Product Type | Shaft Sleeve (Chassis / Driveline Component) |
| Applicable Models | SINOTRUK HOWO A7, T7H, 6×4, 8×4, Heavy-Duty Series |
| Material | High-Grade Alloy Steel (SAE 4140 / Equivalent) |
| Surface Hardness | HRC 55–60 (Induction Hardened) |
| Internal Diameter (ID) | 52.00 ±0.025 mm |
| External Diameter (OD) | 62.00 ±0.030 mm |
| Length | 42.00 ±0.050 mm |
| Surface Finish (Ra) | ≤ 0.8 µm |
| Corrosion Protection | Phosphate Coating / Oil Dip |
| Mounting Type | Press-Fit / Interference Fit (Direct OEM Replacement) |
| Compliance | ISO 9001 / IATF 16949 |
| Warranty | 24 Months |
Superior Wear Resistance – The induction-hardened surface of the 501218721 provides exceptional resistance to abrasion and galling, protecting underlying shafts from premature wear.
Precision Fit – Ground to tight tolerances, the sleeve ensures proper clearance and alignment with seals, bearings, and mating components, reducing the risk of leaks and vibration.
Corrosion Protection – The phosphate coating and oil dip provide effective protection against rust and corrosion, even in humid or salt-spray environments.
Genuine OEM Fit – Factory-spec dimensions and material properties guarantee perfect compatibility with SINOTRUK HOWO driveline assemblies, eliminating modification risks.
Reduced Downtime – By preventing shaft scoring and bearing damage, this sleeve minimizes the need for costly repairs and keeps your truck on the road longer.
Extended Service Life – The combination of hard surface, corrosion resistance, and precise fit ensures that the sleeve itself, as well as the components it protects, enjoy a significantly longer operational life.
The 501218721 Shaft Sleeve is used in critical driveline areas where rotating shafts interface with seals, bearings, or housings. Its robust design makes it ideal for:
Whether you are performing scheduled driveline maintenance or repairing a worn component, the 501218721 shaft sleeve is an essential part of keeping your SINOTRUK HOWO truck operating reliably and efficiently.
The 501218721 Shaft Sleeve (also known as 0501.217.795) is designed as a direct OEM replacement for use in SINOTRUK HOWO heavy-duty trucks equipped with ZF, FAST, or HOWO-branded transmissions and axles.
It fits seamlessly into HOWO A7, T7H, and classic 6×4 and 8×4 chassis, ensuring quick and accurate installation with standard workshop tools. The sleeve’s press-fit design allows for simple replacement without requiring special equipment, reducing maintenance time.
The sleeve’s internal and external dimensions are produced to exact OEM blueprints, guaranteeing proper interference fit and correct positioning of seals and bearings. This ensures that lubricants are retained and contaminants are excluded, maintaining the integrity of the driveline system.
For parts distributors and workshops, the 501218721 simplifies inventory management by covering multiple HOWO variants, reducing the need for multiple sleeve part numbers and ensuring quick service turnaround.
Every 501218721 Shaft Sleeve is manufactured under strict quality control, from raw material certification to final inspection and packaging.
SINOTRUK HOWO employs advanced metrology equipment, including coordinate measuring machines (CMM) and surface finish testers, to verify that each sleeve meets the specified dimensional and surface quality requirements.
Each unit is inspected for internal and external diameter, roundness, and hardness consistency, ensuring that the sleeve is free from defects and ready for immediate installation.
The heat-treatment process is precisely controlled to achieve the optimal hardness-depth profile, balancing wear resistance with toughness to prevent cracking under impact loads.
With a proven service life exceeding 200,000 kilometers under normal operating conditions, the 501218721 is a trusted choice for fleets worldwide, backed by SINOTRUK HOWO’s commitment to quality and reliability.
The 501218721 Shaft Sleeve may be a simple component, but its role in protecting your driveline is invaluable. By choosing this genuine OEM sleeve, you ensure that your SINOTRUK HOWO vehicle continues to operate with minimal friction, reduced wear, and maximum reliability.
Installing a high-quality, factory-spec sleeve prevents shaft scoring, seal leakage, and bearing damage, all of which can lead to costly repairs and unplanned downtime. The precision-ground surface and corrosion-resistant coating also contribute to lower maintenance costs and longer component life.
Fleet managers will appreciate the reduced driveline-related failures and simplified parts inventory, while owner-operators gain peace of mind from a component that is engineered to the highest standards and backed by a comprehensive warranty.
When you need a sleeve that delivers precision fit, superior wear resistance, and long-term reliability, the 501218721 is the definitive choice. Equip your HOWO truck with this essential chassis component and experience the difference that genuine OEM quality makes in driveline performance and uptime.
SINOTRUK HOWO 501218721 Shaft Sleeve (0501.217.795) – Precision Protection for Critical Driveline Components
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