30x50.5x6/11 TB2 oil seal OE TB2-118819840250-NCC — automotive rotary shaft seal
Model / SKU: TB2-118819840250-NCC
This aftermarket TB2 oil seal 30×50.5×6/11 mm matches OE TB2-118819840250-NCC in NBR. For importers, wholesalers and MRO buyers; lead time 7–15 working days — RFQ with size, OE, qty and destination.
Tags: 30x50.5x6/11mm, TB2-118819840250-NCC, TB2 rotary shaft seal, automotive shaft sealing, NBR oil seal
Product photos
Key specs: Inner diameter mm: 30 | Outer diameter mm: 50.5 | Height mm: 6/11 | Material: NBR | Material: NBR | Structure: TB2 | specifications: 30x50.5x6/11 mm | Material: NBR
- Inner diameter mm: 30
- Outer diameter mm: 50.5
- Height mm: 6/11
- Material: NBR
- Material: NBR
- Structure: TB2
- specifications: 30x50.5x6/11 mm
- Material: NBR
- Structure: TB2
- Size: 30x50.5x6/11 mm
Technical summary
Product specifications. Refer to the approved drawing for dimensional tolerances and installation requirements.
| Spec | Value |
|---|---|
| Material | NBR |
| Structure | TB2 |
| Size | 30x50.5x6/11 mm |
Pricing: request a quote (B2B / wholesale).
MOQ / commerce notes: Lead time 7–15 working days
Product details
This is an aftermarket TB2 double-lip metal casing oil seal, size 30×50.5×6/11 mm, part number TB2-118819840250-NCC.
This seal serves rotary shaft lubricant retention and dust exclusion for automotive shaft sealing applications. Buyers should submit RFQ with ID×OD×height mm, OE, quantity and destination; standard stocked sizes ship within 7–15 working days.
VKEFOT manufactures oil seals, O-rings and custom rubber seals in Xingtai and exports to Europe, North America, Middle East and Southeast Asia.
Features & Benefits
TB2 outer metal shell maintains stable shape and consistent fit inside housing bore.
Dual lip construction combines main sealing lip with garter spring and auxiliary dust lip.
The secondary lip blocks sand, moisture and debris to protect internal lubrication.
NBR rubber provides oil resistance and wear resistance for automotive lubricating media.
Built-in stainless steel garter spring sustains radial pressure under variable operating conditions.
Verify shaft, bore and OE before order; this is an aftermarket replacement part.
Factory production MOQ typically 100–5,000 pcs depending on tooling, material and process; this SKU quantity confirmed on quotation. Standard stocked items ship in 7–15 working days.
Custom marking and export packaging are available, and FKM compound upgrade can be supplied upon request.
Material & Process
- Sealing lip：NBR nitrile rubber; outer skeleton: painted carbon steel; garter spring: stainless steel. Typical operating temperature range -30°C to +120°C for NBR. Confirm compound grade with RFQ for FKM variants.
Applications & Compatibility
Commonly listed for automotive rotary shaft, wheel hub and axle sealing. Aftermarket replacement. Verify shaft diameter, housing bore and OE number before order.
Selection & Installation
Selection Tips
Check ID 30 mm, OD 50.5 mm, thickness 6/11 mm, confirm rubber compound and working temperature before ordering.
Installation Steps
- Clean shaft and housing bore thoroughly, remove burrs, rust and old seal residue.
- Lubricate seal lip and shaft surface; dry installation is not permitted.
- Orient seal so spring side faces the oil side, press vertically with matching installation sleeve.
- Do not strike rubber body directly with hammer; apply even pressure only on seal metal shell.
- Press seal fully to seating depth, then manually rotate shaft to confirm free movement.
Packaging & Delivery
Neutral PE bag + export carton; typically 50–200 pcs per carton, adjustable.
Lead time 7–15 working days for this standard spec.
Factory production MOQ typically 100–5,000 pcs; this SKU quantity confirmed on quotation.
Samples and small trial lots for stocked sizes; freight confirmed on RFQ.
Custom orders require 25–40 working days.
Payment, test reports and warranty confirmed on quotation / as agreed by lot.
Send an inquiry with size (ID×OD×height in mm), OE, quantity, destination and duty for a firm lead time.
FAQ
I only have a competitor/OEM part number—can you cross-reference?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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?
Conclusion: 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.
What is this 30x50.5x6/11 TB2 oil seal used for?
This TB2 double lip oil seal size 30×50.5×11mm is an automotive sealing part, oil and wear resistant, used for automotive rotary shaft sealing, wheel hub and axle assembly.
What are the OE numbers and full specifications for TB2-118819840250-NCC?
Part No: TB2-118819840250-NCC, dimensions 30×50.5×6/11 mm, TB2 double lip metal shell oil seal with NBR rubber. Verify dimensions before purchase.
Which vehicle fit TB2-118819840250-NCC oil seal?
It is commonly listed for automotive wheel hub, axle and transmission shaft sealing. Verify shaft and bore dimensions before order.