252x300x16mm Rear Wheel Hub Oil Seal TB NBR for Heavy Duty Axle
252×300×16mm TB type rear wheel hub oil seal, made of premium NBR nitrile rubber with exposed metal outer case and built in garter spring. High quality oil and wear resistant universal aftermarket replacement part, designed for heavy duty commercial truck and trailer axle wheel hub sealing applications. Factory direct supply from China, ideal for truck parts distributors, repair workshops, fleet maintenance and cross border wholesale procurement.
Tags: 252x300mm oil seal, TB type wheel hub seal, NBR metal case oil seal, heavy duty truck axle seal, rear wheel hub oil seal, oil wear resistant seal, universal truck seal, aftermarket heavy duty seal
Product photos
Key specs: Inner diameter mm: 252 | Outer diameter mm: 300 | Height mm: 16 | Material: NBR | Spec & Model: ID 252mm × OD 300mm × Thickness 16mm | Spec & Model: NBR nitrile rubber sealing lips + Cold-rolled steel outer case + Carbon steel garter spring | Spec & Model: TB type double-lip metal-cased seal | Spec & Model: Universal aftermarket replacement part
Inner diameter mm: 252
Outer diameter mm: 300
Height mm: 16
Material: NBR
Spec & Model: ID 252mm × OD 300mm × Thickness 16mm
Spec & Model: NBR nitrile rubber sealing lips + Cold-rolled steel outer case + Carbon steel garter spring
Spec & Model: TB type double-lip metal-cased seal
Spec & Model: Universal aftermarket replacement part
This 252×300×16mm TB type rear wheel hub oil seal is a universal heavy duty sealing solution for commercial truck and trailer axle wheel hub systems, suitable for same size installation bore applications on various domestic heavy truck axles and trailer axles. It adopts an exposed cold rolled steel outer case for rigid mounting and structural stability, paired with precision machined primary oil sealing lip and secondary dust proof lip. A built in carbon steel garter spring maintains consistent radial preload on the shaft surface, even under heavy load vibration and road impact. The inner lip retains hub gear oil and bearing grease inside the assembly, while the outer lip blocks road dust, mud, grit and splash water from invading the bearing chamber, effectively extending the service life of wheel hub bearings and axle components. Produced with strict dimensional tolerance control, it matches standard industry size specifications and can be directly installed without modification. Manufactured in Hebei, China with mature sealing parts supply chain, we maintain stable bulk stock to support fast delivery and large volume procurement for global truck aftermarket channels. Core value for global buyers Standard industry universal size, direct drop in replacement for same bore axle applications Metal case structure for stable mounting and reliable sealing performance Factory direct pricing, cost effective for bulk sourcing and repair shops Consistent batch quality, suitable for long term scheduled replenishment
Material and process
Material ：Premium grade NBR (nitrile butadiene rubber) sealing lips, cold rolled steel outer case, carbon steel garter spring Structure ：TB type double lip metal cased rotary shaft oil seal Hardness ：70±5 Shore A Key performance ：Oil resistant, wear resistant, dust proof, anti vibration, anti aging Working temperature range: 30℃ +120℃ (NBR version) Manufacturing process Integrated vulcanization bonding between rubber lip and metal case Precision grinding of sealing lip edge for uniform contact pressure with shaft Dimensional inspection per production batch before shipment Quality control aligned with automotive aftermarket part standards Upgrade option ：FKM (fluoroelastomer) version available for higher temperature working conditions
Application and compatibility
Product Type ：Universal aftermarket TB type metal cased oil seal for heavy duty vehicles Core dimensions ：ID 252mm × OD 300mm × Thickness 16mm Compatible fluids: Hub gear oil, wheel bearing grease, drive axle lubricants, general chassis lubricants Fit applications Heavy duty commercial truck rear wheel hub sealing Semi trailer axle wheel hub sealing Industrial heavy equipment rotating shaft sealing Same size bore axle replacement and repair scenarios Suitable for ：Truck parts distributors, independent repair workshops, fleet maintenance centers, trailer parts suppliers, cross border auto parts traders Buyer notice ：This is a universal size aftermarket replacement part. Please confirm shaft diameter, housing bore size and seal thickness before ordering. Dimension mismatch will cause lubricant leakage after installation.
Selection guide
Selection Guide 1. Confirm shaft ID 252mm, housing OD 300mm, required thickness 16mm and TB metal case double lip structure. 2. Standard NBR version for normal truck operating conditions ( 30℃ 120℃); select FKM upgrade for high temperature and chemically aggressive environments. 3. For bulk repair or fleet maintenance projects, contact us for exclusive volume pricing. Installation Steps Surface Preparation Thoroughly clean the hub housing bore and shaft surface, remove old seal residue, dirt, rust and metal burrs. Pre lubrication Apply matching bearing grease or gear oil evenly on the sealing lip and shaft mating surface. Dry installation is strictly prohibited as it will cause premature lip wear and failure. Orientation Confirmation The main sealing lip faces the lubricant cavity side; the dust proof lip faces the wheel outer side. Reverse installation will cause oil leakage and loss of dust protection. Press fit Installation Use a dedicated press sleeve tool to press the seal in evenly and vertically. Never strike the metal case directly to avoid seal deformation and lip tearing. Post installation Check Ensure the seal sits fully flush inside the housing bore without tilt or offset. Inspect the sealing lip for nicks, scratches and deformation. Function Test Manually rotate the wheel hub assembly to confirm smooth rotation without abnormal binding resistance.
Packaging and delivery
Inner packaging ：Each piece individually packed in anti dust poly bag to protect the sealing lip from scratches and contamination. Outer packaging ：Standard export corrugated carton with shock proof padding. Custom packaging with private label available. Packing quantity ：Adjustable per bulk order requirements. Lead time Stock items ：Ship within 7 15 working days after payment Custom private label / packaging orders: 25 40 working days Large volume bulk orders: Lead time to be confirmed based on quantity Custom services ：Private label printing, custom packaging design, consolidated shipping for mixed SKUs Shipping terms ：EXW, FOB, CIF available Export documents ：Commercial invoice, packing list, certificate of origin, dimensional test report available on request
There are only competing products—OEM and model—but not your part number.
Can we use them as a reference for selection?
Sure. Please include the competing products/OEM model, key dimensions (ID × OD × height, in mm), and operating conditions (medium, temperature, pressure, rotational speed) to the inquiry form, and we will match them with equivalent specs items in our catalog.If dimensions are unavailable, please send model and photos/drawing first, and we will confirm the details. The final model selection will be based on the confirmation of drawing and operating conditions, and the official quotation will be subject to the written quotation order.
Does it support OEM/ODM along with privatization of packaging and tagging?
We support performing OEM/ODM in accordance with drawing/sample, as well as packaging and marking customization within the agreed upon scope.Please provide details on the target market’s compliance requirements and estimated annual volume. During the RFQ phase, we will confirm process feasibility, tooling costs, and mass production cycle time.
What is 252x300x16mm oil seal used for?
It is widely used for heavy duty truck and semi trailer axle wheel hub sealing, retaining gear oil and bearing grease while blocking road dust, mud and splash water.
What type of seal is this 252x300mm oil seal?
It is a TB type metal cased double lip oil seal, with exposed steel outer case and NBR sealing lips, designed for heavy duty automotive sealing applications.
What material is this heavy duty oil seal made of?
Made of premium grade NBR nitrile rubber sealing lips with cold rolled steel outer case and carbon steel garter spring, working temperature 30℃ to +120℃.
Is this 252x300x16mm seal a standard universal size?
Yes, it is a standard industry universal size seal, direct drop in replacement for same bore heavy duty truck and trailer axle applications.
What is your typical MOQ for this oil seal?
Depends on spec; typically 100 5,000 pcs. Sample orders are supported for quality evaluation before bulk purchase.
What is the lead time for stock orders?
Stock items are shipped within 7 15 working days after payment. Custom orders take 25 40 working days.
What trade terms do you offer?
We offer EXW, FOB and CIF trade terms to support cross border procurement.
Can you provide private label service?
Yes, we provide private label printing and custom packaging services. MOQ for custom orders is based on requirements, lead time 25 40 working days.
Do you have a high temperature version of this seal?
Yes, we offer FKM fluoroelastomer upgrade version for higher temperature working conditions.
Where is this oil seal manufactured?
It is factory direct manufactured in Hebei, China, with mature heavy truck seal supply chain and stable bulk production capacity.
