170x190x8.5mm Steering Knuckle Shaft Oil Seal OEM 0059978447 | Brown NBR for Mercedes-Benz
Model / SKU: 170-190-8.5-tc-nbr-0059978447
170×190×8.5mm steering knuckle shaft oil seal, OEM cross reference 0059978447, made of premium brown NBR nitrile rubber with built-in garter spring. Brand new high-quality aftermarket replacement seal, specifically compatible with Mercedes-Benz commercial vehicle steering knuckle systems. Direct interchangeable with original OEM dimensions, ideal for overseas auto parts distributors, Mercedes-Benz repair workshops, fleet maintenance and cross-border wholesale procurement.
Tags: steering knuckle oil seal, OEM 0059978447 seal, Mercedes Benz oil seal, 170x190mm shaft seal, NBR brown steering seal, aftermarket Mercedes seal
Product photos
Key specs: Inner diameter mm: 170 | Outer diameter mm: 190 | Height mm: 8.5 | Material: NBR | Size: ID 170mm × OD 190mm × Thickness 8.5mm | Material: Brown NBR nitrile rubber + Carbon steel garter spring | Structure: TC type double-lip skeleton seal | OEM Cross Reference: 0059978447
- Inner diameter mm: 170
- Outer diameter mm: 190
- Height mm: 8.5
- Material: NBR
- Size: ID 170mm × OD 190mm × Thickness 8.5mm
- Material: Brown NBR nitrile rubber + Carbon steel garter spring
- Structure: TC type double-lip skeleton seal
- OEM Cross Reference: 0059978447
- Fitment: Mercedes-Benz steering knuckle shaft
- Type: Aftermarket replacement part
- Standard: ISO/TS 16949 compliant
- Size: ID 170mm × OD 190mm × Thickness 8.5mm
Technical summary
Product specifications. Refer to the approved drawing for dimensional tolerances and installation requirements.
| Spec | Value |
|---|---|
| Size | ID 170mm × OD 190mm × Thickness 8.5mm |
| Material | Brown NBR nitrile rubber + Carbon steel garter spring |
| Structure | TC type double-lip skeleton seal |
| OEM Cross Reference | 0059978447 |
| Fitment | Mercedes-Benz steering knuckle shaft |
| Type | Aftermarket replacement part |
| Standard | ISO/TS 16949 compliant |
Pricing: request a quote (B2B / wholesale).
Product details
This 170×190×8.5mm TC-type oil seal is a premium aftermarket replacement for Mercedes-Benz steering knuckle shaft systems, with OEM cross reference number 0059978447.
It adopts a double-lip skeleton structure with precision-machined primary sealing lip and auxiliary dust lip, paired with a built-in high-carbon steel garter spring to maintain stable radial preload under continuous steering operation and road vibration. It effectively retains chassis lubricant and steering gear oil inside the knuckle housing, and blocks external road dust, mud, grit and splash water from invading internal components to extend the service life of steering knuckle bearings and shafts.
Manufactured under ISO/TS 16949 quality management system with strict dimensional tolerance control, it matches the original OEM size specification and can be directly installed without modification. We maintain stable bulk stock to support fast delivery and large-volume procurement, serving global Mercedes-Benz parts distributors and aftermarket repair channels.
Core value for buyers
- Direct OEM size interchange, drop-in replacement, reduces maintenance downtime
- Matches original equipment sealing performance for Mercedes-Benz chassis
- Factory direct pricing, cost-effective for bulk and scheduled procurement
- Stable quality consistency for batch replacement projects
Material and process
- Material：Premium grade brown NBR nitrile rubber, carbon steel garter spring, steel reinforcement skeleton
- Structure：TC type double-lip rotary shaft skeleton oil seal
- Hardness：70±5 Shore A
- Key performance：Oil resistant, wear resistant, dust-proof, anti-vibration, anti-aging
Working temperature range: -30℃ ~ +120℃
Manufacturing process
Integrated vulcanization molding, firm bonding between rubber and skeleton
Precision grinding of sealing lip edge, uniform contact pressure with shaft surface
100% dimensional inspection for each batch before shipment
Strict quality control per European commercial vehicle aftermarket part standards
Upgrade option：FKM fluoro-rubber version available for higher temperature and chemically aggressive working conditions
Application and compatibility
- Product Type：Aftermarket TC-type steering knuckle shaft oil seal for Mercedes-Benz commercial vehicles
- Core dimensions：ID 170mm × OD 190mm × Thickness 8.5mm
OEM cross reference: 0059978447
Compatible fluids: Steering gear oil, chassis bearing grease, general transmission lubricants
Fit applications
Mercedes-Benz heavy duty truck steering knuckle shaft sealing
Commercial vehicle steering system housing sealing
Same-size chassis rotating shaft sealing applications
Suitable for：Mercedes-Benz parts distributors, authorized repair workshops, fleet maintenance centers, cross-border auto parts traders
Buyer notice：This is an aftermarket replacement part, not genuine OEM product. The OEM part number is provided for cross reference only. Please confirm shaft diameter, housing bore size and seal structure before ordering. Dimension mismatch will cause lubricant leakage after installation.
Selection guide
Selection Guide
- Confirm OEM cross reference number 0059978447, and verify shaft ID 170mm, housing OD 190mm, thickness 8.5mm and TC double-lip structure.
- Standard NBR version for normal steering system operating conditions (-30℃~120℃); select FKM upgrade for high-temperature and chemically aggressive environments.
- For fleet long-term scheduled procurement, contact us for exclusive bulk pricing and dedicated supply schedule.
Installation Steps
Surface Preparation
Thoroughly clean the steering knuckle housing bore and shaft surface, remove old seal residue, carbon deposit, dirt and burrs.
Pre-lubrication
Apply matching steering gear oil or bearing grease 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 external environment 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 rubber body 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 steering knuckle shaft 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.
MOQ：No minimum order for stock items; sample orders supported for quality evaluation.
Lead time
Stock items：Ship within 2-5 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：OEM 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
FAQ
I only have a competitor/OEM part number—can you cross-reference?
Yes. Send the reference PN, ID×OD×height in mm, and duty (media, temperature, pressure, speed). We match equivalents in the catalog; the Cross Reference page also searches by keyword. Final selection follows drawing and duty confirmation — do not order from a photo alone.
Do you support OEM/ODM, private packing and marking?
Yes — OEM/ODM from drawings or samples, plus agreed packing and marking. Share target-market compliance needs and annual volume; RFQ confirms process, tooling cost and cadence. VKEFOT is the export brand of the Xingtai factory, not a trading desk.
TC vs TB oil seal: which should I specify?
For a rotary shaft that needs a dust lip plus oil lip, start with TC (rubber-covered dual-lip is common); TB is typical when a semi-metal case needs a stiffer bore fit. Shaft diameter, housing, runout and dust still decide. Send ID×OD×height in mm and speed on the RFQ — not only a competitor photo.
NBR vs FKM oil seal for hot engine oil?
Continuous engine-oil duty near 120°C or fuel exposure should be reviewed as FKM; general mineral oil at moderate temperature and cost-sensitive repair jobs often stay NBR. Brown color is not proof of FKM. The quote names the grade and temperature limit — do not order by color.
Oil seal vs O-ring: when do I use which?
Use a metal-cased radial shaft (skeleton) oil seal for rotating shafts; use an O-ring for static glands or reciprocating grooves. An O-ring on a rotary shaft wears out quickly. VKEFOT makes both — state motion type (rotary/static/reciprocating) and ID×OD×section on the RFQ.
Cassette seal vs dual-lip TC for dusty construction equipment?
Ag gearboxes and construction travel shafts with mud and long service intervals should be reviewed as cassette/combined seals; many automotive hub repair jobs stay dual-lip TC. Cassette packs are thicker and need different bore and axial space. A job-site photo is not enough — send ID×OD×height.
Xingtai oil seal factory vs trading company — how do I tell?
VKEFOT is the export brand of Xingtai Hanchi Intelligent Technology Co., Ltd. Mixing, vulcanization and outgoing inspection run in Xingtai, then goods export to Europe, North America, the Middle East and Southeast Asia. A trading desk usually cannot change compound or cut tooling. For OEM drawings, ask who runs the process and QC — not only catalog price.
What is a skeleton / radial shaft oil seal?
A skeleton oil seal is a metal-cased radial shaft seal: the rubber lip rides the shaft and the case holds interference in the bore. Common styles include TC, TB and TA. Minimum spec is ID×OD×height in mm, compound and duty. VKEFOT catalogs automotive and industrial shaft seals; trust the product-page dimensions.
What do ID, OD and height mean on an oil seal RFQ?
ID is inside diameter (shaft), OD is outside diameter (bore), height is axial width, all in millimetres. Missing any one blocks a cross-reference. Example: 56×112×8/10 means 56 mm ID, 112 mm OD, 8/10 mm height. Put those three numbers and the compound on the RFQ.
Which oil seal for an automotive wheel hub or differential pinion?
Hub repair jobs often use dual-lip TC; differential pinion shafts often need a secondary lip or split height (e.g. 8/10 or 12/22 mm). Use measured or OEM dimensions — not a marketplace title. VKEFOT application pages cover drivetrains and hubs; send an OEM number or ID×OD×height on the RFQ.
How to select oil seals for ag gearbox and PTO shafts?
Ag gearboxes and PTO shafts see dust and shock — prefer a dust lip or cassette, with NBR or FKM matched to gear oil and temperature. Do not force a passenger-car hub seal onto a PTO shaft. Send shaft, bore, height and whether mud/water is present, then RFQ.
What matters for pump, valve and compressor shaft seals?
Match media (oil, water, gas) and temperature first, then lip style and compound; do not default to cheap NBR for high speed or dry running. Put shaft runout and eccentricity on the RFQ. VKEFOT application cases include pumps, valves and compressors — still use measured sizes.
Does a brown oil seal mean it is FKM?
No. Brown NBR is common; color is not proof of FKM. For heat or fuel duty, write temperature and media on the RFQ so the factory names the grade. Ordering by color is a frequent cause of early leak.
Can you quote an oil seal from a photo only?
Not as a firm quote. We need at least ID×OD×height in mm, ideally compound and speed. A photo can show lip count and case style; it does not replace dimensions. Incomplete RFQs get a request for those three numbers before price.
If a new oil seal leaks quickly, is it always a bad seal?
Not always. Rough shaft finish, runout, cocked installation or the wrong compound also leak early. Check size and media/temperature match before blaming the part, then inspect the journal. Note time-to-fail (e.g. 50 hours) on the RFQ so we diagnose — do not just buy a cheaper seal.
What is needed for private-label OEM packing of oil seals?
Private packing and marking need annual volume, target-market compliance and artwork; tooling cost and cadence are confirmed on the RFQ — not a one-line “please OEM”. VKEFOT runs OEM/ODM after drawings or samples are complete.
Who is VKEFOT and how does it relate to Xingtai Hanchi?
VKEFOT manufactures oil seals, O-rings and custom rubber seals in Xingtai and exports to Europe, North America, Middle East and Southeast Asia. The manufacturer is Xingtai Hanchi Intelligent Technology Co., Ltd. Use this wording on quotes and certificates — do not invent alternate spellings of the brand.
Does this seal cross reference OEM number 0059978447?
Yes, this is an aftermarket replacement seal with dimensions matching OEM 0059978447, direct drop-in installation without modification.
Is this seal compatible with Mercedes-Benz?
Yes, it is specifically designed as a replacement for Mercedes-Benz heavy duty truck steering knuckle shaft systems.
What is 170x190x8.5mm oil seal used for?
It is mainly used for commercial vehicle steering knuckle shaft housing sealing, retaining steering gear oil and bearing grease while blocking road dust and mud.