28x40x8mm CNB high pressure power steering oil seal NBR
Model / SKU: CNB-28-40-8-NBR
This aftermarket CNB oil seal 28×40×8 mm uses NBR for automotive power steering gear high pressure sealing. Factory direct sales, in stock.
Tags: 28x40x8mm, CNB power steering seal, steering gear seal, high pressure power steering seal, NBR oil seal
Product photos
Technical summary
Product specifications. Refer to the approved drawing for dimensional tolerances and installation requirements.
| Spec | Value |
|---|---|
| Size (mm) | 28x40x8 |
| Material | NBR |
| Structure | CNB1W11 |
| Size | 28x40x8 mm |
Pricing: request a quote (B2B / wholesale).
MOQ / commerce notes: In stock: ships in 1 to 2 days | Not in stock but still in current production: 10 to 15 days | Not in stock and not in production: 25 to 30 days
Product details
This is an aftermarket CNB high-pressure power steering oil seal with dimensions 28×40×8 mm, built to retain hydraulic fluid inside automotive steering gear assemblies.
Factory direct sales and ready in stock.
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
NBR nitrile rubber maintains stable sealing performance against standard automotive power steering hydraulic fluid.
CNB composite lip structure handles cyclic high hydraulic pressure and reduces fluid leakage on steering gears.
Built-in garter spring keeps consistent lip contact pressure when pressure fluctuates in the hydraulic circuit.
Secondary dust barrier prevents grit, moisture and road contaminants from entering the steering gear assembly.
Integrated backup ring resists lip overturning under high hydraulic pressure during steering operation.
Verify shaft and bore dimensions before order; this item is aftermarket replacement and not genuine OEM component.
FKM or HNBR compound upgrade is available for higher temperature or aggressive fluid media upon request.
OEM marking and neutral export carton packing can be arranged for bulk shipments.
Packaging & Delivery
Samples and small trial lots for stocked sizes; freight confirmed on RFQ.
Payment, test reports and warranty confirmed on quotation / as agreed by lot.
Send an inquiry with size (ID×OD×height in mm), quantity, destination and duty for a firm lead time.
FAQ
What is this 28x40x8mm CNB oil seal used for?
This seal is a high pressure power steering oil seal for automotive steering gears, designed to retain hydraulic fluid and block external contaminants.
What are the OE numbers and full specifications for this seal?
Dimensions are 28×40×8 mm, CNB1W11 structure with NBR rubber. No matching OE number found for this exact size; verify dimensions before purchase.
Which vehicle fit this 28x40x8 power steering oil seal?
It is widely used for automotive power steering gears. Verify shaft and bore dimensions before order.
Is this CNB oil seal a genuine OEM part?
No — it is an aftermarket replacement seal; verify size before order.
How to install 28x40x8mm oil seal without grease leakage?
1. Clean shaft and housing, remove burrs and old seal debris. 2. Lubricate seal lip and shaft surface, dry installation is forbidden. 3. Align seal with spring side toward hydraulic fluid chamber, press vertically with a sleeve. 4. Apply pressure only on metal shell, never hit rubber lip. 5. Seat fully then rotate shaft manually to check free movement.
What dimensions should I send for an RFQ on this CNB oil seal?
Submit ID×OD×height in mm, quantity, destination and duty for quotation.