The NTN 4T-30209U is a precision single-row tapered roller bearing engineered to support combined radial and axial loads in automotive and mechanical applications. With metric ISO dimensions of 45 mm bore × 85 mm outer diameter × 20.75 mm width, it delivers smooth, stable rotation and long service life in differentials, axle assemblies, hubs, and driveline systems.

Tapered roller bearings are designed so the tapered rollers and raceways intersect on the bearing centerline, allowing the bearing to handle axial thrust and radial loading simultaneously.

Technical Specifications

Confirmed Vehicle Fitment

This bearing size is commonly used in Nissan / Datsun / Infiniti rear differential and axle assemblies where OEM bearing part numbers like 38440-N3100 / 38440-N3110 / 38440-N3111 or similar appear for tapered bearings of this dimension (45×85×20.75 mm).

Compatible Vehicle Models & Years

(References are based on common axle/differential bearing part number cross references for bearings in this dimensional family — matching sizes and applications in these models.)

⚠ Always verify the OEM part number in your specific vehicle’s service manual or parts catalog before ordering to confirm fitment.

Related Brand Cross-Reference Part Numbers

This bearing size is a standard metric tapered roller bearing, and compatible equivalents from other major brands may be used when dimensions and specifications match:

✔ SKF: 30209 metric tapered roller bearing
✔ Timken: 30209M metric class tapered bearing
✔ NSK: 30209J2 (metric interchangeable series)
✔ KOYO: 30209JR equivalent dimensions
✔ Perfect Circle: 30209C (metric interchange code)

⚠ Before substituting, check exact sealing type, contact angle and tolerance to ensure proper replacement performance.

Features & Benefits

✔ OEM-Quality Precision: Manufactured by NTN to deliver dependable performance and long service life in demanding conditions.
✔ High Load Support: Designed for combined radial and axial loads common in differential and axle applications.
✔ Separable Design: Cone and cup parts allow precise preload and installation.
✔ Versatile Use: Suitable for automotive differentials, axle hubs, and mechanical driveline systems.
✔ Broad Interchangeability: Matches standard 30209 metric series bearing dimensions accepted by other quality brands.

Where It’s Used

Automotive Applications

• Rear differential side bearings

• Axle support and carrier bearings

• Hub and driveline bearing points

Industrial & Mechanical

• Heavy machinery rotating shafts

• Conveyors and industrial drives

• Agricultural and off-road equipment

Delivery
• Nationwide delivery, usually 2–4 days depending on location.
• Free shipping on orders over K500,000.
• Same-day delivery available in Yangon for eligible items — see the delivery estimate above for this product.

Store Pickup
• Free pickup available at select Win Store locations for eligible items — see the pickup availability above for this product.

Payment
• KPay, Wave, AYA, Cash on Delivery, and VISA accepted.

See full delivery and return policy in our Help Center

Return Policy
• Items can be returned within 14 days from the delivery date.
• Products must be unused and in original packaging.
• Proof of purchase (order confirmation or invoice) is required.

Non-Returnable Items
• Used or installed products
• Items damaged due to improper handling
• Products modified after purchase

Warranty
• Warranty coverage may vary depending on the manufacturer or supplier.
• If a product includes manufacturer warranty, claims must follow supplier terms.

See full delivery and return policy in our Help Center