DC4 30x40.5x10.5mm NBR Double Spring Oil Seal For Motorcycle Shock Absorber
Model / SKU: VKEFOT-DC4-30-40.5-10.5-NBR
This aftermarket DC4 double spring oil seal 30x40.5x10.5mm in NBR, designed for motorcycle front fork and shock absorber sealing.
Tags: 30x40.5x10.5mm, DC4 oil seal, double spring fork seal, motorcycle shock absorber, NBR fork oil seal
Product photos
Technical summary
Product specifications. Refer to the approved drawing for dimensional tolerances and installation requirements.
| Spec | Value |
|---|---|
| Size (mm) | 30x40.5x10.5 |
| Material | NBR |
| Structure | DC4 double spring shock absorber oil seal |
| Size | 30x40.5x10.5mm |
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 aftermarket DC4 double spring oil seal 30x40.5x10.5mm is a reciprocating motion seal built for motorcycle front fork and shock absorber suspension.
Buyers sourcing motorcycle suspension seals can submit RFQ with dimension, quantity and destination country.
Features & Benefits
DC4 profile with dual garter springs maintains consistent lip pressure on reciprocating piston rod for reliable oil retention.
NBR rubber lip delivers good oil resistance and wear resistance under standard motorcycle fork operating conditions.
Dual lip design combines primary oil retention lip and secondary dust exclusion lip to protect internal suspension components.
Verify dimension and rod surface condition before installation, this seal is aftermarket replacement, not genuine OEM part.
Factory standard options, confirm on RFQ.
VKEFOT manufactures oil seals, O-rings and custom rubber seals in Xingtai and exports to Europe, North America, Middle East and Southeast Asia.
Material & Process
Rubber coated metal skeleton with dual garter springs, black finish.
Packaging & Delivery
Standard neutral polybag + export carton.
Samples and small trial lots for stocked sizes; freight confirmed on RFQ.
Send an inquiry with size (ID×OD×height in mm), quantity, destination and duty for a firm lead time.
FAQ
What is DC4 30x40.5x10.5mm double spring oil seal used for?
DC4 30x40.5x10.5mm NBR double spring oil seal is used for motorcycle front fork and shock absorber piston rod sealing, to retain fork oil and block dust and water ingress.
What is DC4 type double spring shock absorber oil seal?
DC4 oil seal is a reciprocating motion seal with dual garter springs and double lips, designed for motorcycle suspension to maintain stable lip pressure on moving piston rod.
What material is this DC4 motorcycle fork oil seal?
Made of NBR nitrile rubber, good compatibility with conventional motorcycle fork oil and shock absorber fluid.
Is DC4 30x40.5x10.5mm oil seal a genuine OEM part?
No — it is aftermarket replacement double spring fork oil seal; verify dimension before purchase.
How to install DC4 30x40.5x10.5mm fork oil seal without leakage?
1. Clean piston rod and fork housing, remove burrs and old seal residue. 2. Protect sealing lips from scratches. 3. Press seal evenly and keep perpendicular. 4. Do not hammer rubber directly. 5. Assemble and test fork movement for oil leak.
What information should I provide for RFQ on this DC4 fork oil seal?
Submit dimension in mm, quantity, destination country and working medium for quotation.