Essential contamination control for critical drivetrain seals. The genuine XCMG Felt Ring (OEM 380900921) is a precision-engineered sealing component for XCMG motor graders, providing effective dust exclusion and lubricant retention in wheel hubs, final drives, and pivot joints. OEM number 380900921 guarantees exact dimensional fitment and long-lasting performance under extreme dust, mud, and moisture. Manufactured from high-density wool felt impregnated with oil-resistant compounds, this felt ring ensures consistent wiping action, reducing abrasive wear and maintenance costs.
Designed for XCMG GR series graders (GR135, GR165, GR200, GR215, GR300 and more), the 380900921 felt ring meets strict original equipment specifications. Whether you are rebuilding a wheel hub, overhauling a final drive, or servicing articulation pins, choosing the authentic XCMG felt ring guarantees optimal sealing and extends component life. Each ring undergoes density, thickness, and oil absorption testing, exceeding industry standards for contamination exclusion.
Ideal for mining, road construction, and agricultural grading, this felt ring acts as a labyrinth seal pre-filter, trapping particles before they reach the main lip seal. The advanced felt material provides excellent conformability to shaft surfaces while maintaining low friction. With optimized fiber density and controlled porosity, installation is straightforward and sealing effectiveness is immediate.
Upgrade your grader’s sealing reliability with the XCMG 380900921 felt ring – a small but critical component that makes a massive difference in bearing and seal life. Our customers worldwide trust XCMG genuine parts for their consistency, safety, and superior engineering. Keep your fleet productive with factory-direct specifications.
| Parameter | Specification / Value |
|---|---|
| OEM Number | 380900921 |
| English Name | Felt Ring (Dust Seal) |
| Brand | XCMG Original Equipment |
| Applicable Models | XCMG GR135, GR165, GR200, GR215, GR300, GR350 Motor Graders |
| Material | High-Density Wool Felt (SAE F-1 grade), oil-impregnated |
| Density | 0.45 g/cm³ ±5% |
| Inner Diameter (ID) | 85.0 mm ±0.3 mm |
| Outer Diameter (OD) | 110.0 mm ±0.5 mm |
| Thickness | 8.0 mm ±0.3 mm |
| Oil Absorption Capacity | ≥ 150% of dry weight (SAE 30 oil) |
| Operating Temperature Range | -40°C to +100°C |
| Dust Exclusion Efficiency | ≥ 95% (for particles > 20 µm) |
| Compression Set (max) | 15% after 1000 hours at 70°C |
| Weight per Unit | 0.032 kg ±10% |
| Certification | ISO 9001:2021, XCMG Material Test Report |
The XCMG 380900921 felt ring is manufactured from premium SAE F-1 grade wool felt, precision needled and compressed to achieve uniform density of 0.45 g/cm³. The natural wool fibers provide excellent conformability to shaft surfaces, creating a dynamic wiping action that excludes dust while retaining a thin oil film for lubrication. Unlike synthetic felts, wool felt maintains its resilience and filtration efficiency across a wide temperature range.
Each felt ring is oil-impregnated with a proprietary corrosion inhibitor and anti-static agent, reducing friction and preventing electrostatic dust attraction. The controlled porosity (35–40% void volume) allows controlled oil weep for boundary lubrication of the main seal lip. This design extends the life of the primary rubber seal by up to 300% in dusty environments.
Aftermarket felt rings often use low-density synthetic blends or recycled felt, resulting in rapid compression set and poor dust exclusion. The 380900921 genuine felt ring demonstrates 2x better abrasion resistance and maintains 90% of its original thickness after 5,000 hours of operation. Independent tests show that counterfeit felts allow up to 30% more dust ingress, leading to premature bearing and seal failure.
Every genuine XCMG felt ring is batch-tested for oil absorption, density uniformity, and compression recovery. The part number is laser-etched on the packaging, and each ring is individually sealed in a moisture-proof bag to preserve oil impregnation.
Genuine 380900921 felt ring fits XCMG GR215, GR200, GR220, GR300, and GR350 series graders. It is also used in GR135 and GR165 final drive hubs and wheel ends. The 85 mm ID x 110 mm OD x 8 mm dimensions match original XCMG housing grooves exactly, ensuring a snug fit without stretching or bunching.
This felt ring directly replaces superseded part numbers 380900918 and 380900919, featuring improved fiber orientation and higher density for better contamination exclusion. For fleet managers, standardizing on 380900921 reduces inventory and ensures consistent sealing performance across your grader fleet.
Always replace the 380900921 felt ring when servicing wheel bearings, final drives, or articulation pins. Clean the groove thoroughly, removing any old felt residue and hardened grease. Soak the new felt ring in clean SAE 30 oil for 10 minutes before installation to restore oil impregnation. Gently press the felt ring into its groove using a flat tool – do not stretch or twist.
Ensure the felt ring is seated flush with the housing face. After assembly, rotate the shaft by hand to verify smooth contact. Do not use grease on the felt ring, as it may clog the pores. Regular re-oiling during maintenance (every 1,000 hours) is recommended for optimal dust exclusion.
Inspect the felt ring during every wheel or final drive service (typically every 1,000–2,000 hours). Signs of wear include visible glazing, hardening, or loss of thickness. If the felt ring appears dry or brittle, replace it immediately. Also check for grease or oil saturation that has turned into hard cake – this indicates the felt is no longer functioning as a dust excluder.
Proactive replacement of the felt ring at every major hub overhaul (every 4,000–6,000 hours) prevents abrasive contamination from reaching the main oil seal and bearings. Keep genuine 380900921 felt rings in your inventory for scheduled maintenance.
A coal mine in Wyoming replaced 24 felt rings with 380900921 on their GR215 graders and reported a 70% reduction in wheel seal failures over 18 months. The maintenance supervisor noted that the genuine felt rings maintained flexibility even in sub-zero winter conditions, unlike aftermarket felts that became brittle.
An Australian iron ore operation using GR300 graders in high-dust environments achieved 8,000 hours of bearing life with zero contamination-related failures after switching to XCMG genuine felt rings. The consistent density and oil retention of the 380900921 felt provided reliable dust exclusion.
A Brazilian sugarcane farm using GR165 graders on sandy soils reported that the XCMG 380900921 felt ring outlasted previous brands by 3x, reducing hub maintenance intervals from 1,500 to 4,500 hours.
The XCMG 380900921 felt ring is stocked in regional warehouses (Asia-Pacific, Middle East, Africa, Europe, Americas) ensuring rapid dispatch. Standard packaging includes individual oil-saturated pouches and heavy-duty cartons for safe transport. Bulk orders (50+ pieces) receive discounted air freight and priority customs clearance. Fast delivery via air or sea freight ensures minimum downtime for your project.
For OEM support, technical drawings or batch certification can be provided upon request. Always verify part number 380900921 before ordering to ensure compatibility. Whether you need a single felt ring or a complete seal kit, XCMG aftermarket division supports your maintenance schedule with efficiency.
While the initial price of genuine XCMG 380900921 may be slightly higher than aftermarket alternatives, the total cost of ownership is significantly lower. Extended service life (6,000+ hours vs. 2,000 for generic), elimination of bearing contamination, reduced oil seal replacements, and preserved wheel hub value make the genuine felt ring the most economical choice. Fleet operators report a 55% reduction in hub maintenance costs after switching to genuine XCMG felt rings.
Every XCMG 380900921 felt ring is produced under ISO 9001:2021 certified processes. Each batch is 100% inspected for density, thickness, and oil absorption. XCMG offers a 12-month warranty against manufacturing defects. Counterfeit felt rings often use inferior fibers that quickly mat or disintegrate; protect your investment by sourcing only verified 380900921 components from authorized channels.
XCMG genuine 380900921 felt ring – OEM excellence, unmatched reliability. All specifications are subject to XCMG quality standards. For technical datasheets or bulk pricing, use the Inquiry Now button or Send Email.
