Product Specifications
| Parameter |
Details |
| Model NO. |
21307 |
| Feature |
Long Life, High Speed, Low Noise |
| Specification |
35x80x21mm |
| Trademark |
NTN |
| Origin |
Japan |
| HS Code |
8482300000 |
| Package Size |
5.50cm * 10.00cm * 4.50cm |
| Package Gross Weight |
0.550kg |
Application Industries
| Industry |
Typical Equipment |
| Automotive |
Gearboxes, Transmission Systems |
| Industrial Manufacturing |
Electric Motors, Fans |
Stop Gearbox Downtime with Genuine NTN 21307 Spherical Roller Bearing
When gearbox bearings fail prematurely, production lines halt, maintenance costs spike, and delivery deadlines are missed. Many buyers face the frustration of inconsistent quality from unauthorized suppliers or struggle with large minimum order quantities that tie up capital. As a bearing supplier with decades of export experience, we understand these challenges firsthand—especially the critical need for reliable components in high-torque applications like gearboxes.
Genuine NTN 21307 Bearings: Precision Engineered for Longevity
The High Precision NTN Spherical Roller Bearing 21307 addresses these pain points with its 35x80x21mm dimensions, optimized for gearbox performance. As an authorized supplier, we ensure every unit is 100% genuine, backed by NTN’s renowned manufacturing standards. With a focus on low noise and high-speed capabilities, this bearing reduces operational disruptions while supporting continuous machinery operation—whether in automotive transmissions or industrial fans.
Where This Bearing Excels
Designed for heavy-duty applications, the NTN 21307 Spherical Roller Bearing thrives in environments with high radial loads and moderate axial loads. Its robust construction handles the dynamic stresses of gearbox operation, where rotational precision directly impacts energy efficiency and equipment lifespan. In automotive and industrial settings, this bearing’s ability to maintain stability at varying speeds makes it a cornerstone of reliable machinery performance.
Technical Details That Define Performance
The 21307’s 35mm bore diameter and 80mm outer diameter balance compact design with load-bearing capacity, critical for gearbox integration. Its 21mm width provides sufficient contact area to distribute stress evenly, enhancing durability. The "Long Life" feature stems from NTN’s advanced materials and heat treatment processes, ensuring resistance to wear even under continuous use. Low noise operation is achieved through precision machining of raceways and rollers, minimizing vibration—a key factor in extending adjacent component life.
The True Cost of Compromising on Bearing Quality
Counterfeit bearings may offer lower upfront prices, but they often fail within months, leading to unplanned downtime. A single gearbox failure can cost thousands in lost production and repair fees. In contrast, the NTN 21307 Spherical Roller Bearing, manufactured to ISO industrial standards, delivers consistent performance, reducing total cost of ownership by minimizing replacements and maintenance. Our strict quality control—including incoming material inspection and full-process supervision—ensures every bearing meets NTN’s stringent specifications.
Why Buyers Trust Saifan for NTN Bearings
With over 18 years in the industry, we’ve built a global reputation for reliability. As an ISO 9001:2015 and ISO 14001 certified company, we maintain rigorous quality management systems. Our one-stop service includes not just supply but also technical support—from bearing selection to installation guidance. We offer flexible order policies, with 1 piece MOQ for standard bearings and sample orders available, ensuring you get the exact quantity you need without excess inventory. Our efficient delivery (3-5 days for samples, 5-15 days for bulk) means minimal waiting for critical replacements.
Packaging & Shipping
- Carton pallet packaging for secure transportation
- Sample orders shipped within 3-5 working days
- Bulk orders delivered in 5-15 working days
- Multiple logistics options available (air, sea, courier)
- 1 piece MOQ for standard bearings; customized quantities negotiable
Get Your NTN 21307 Bearing Today
Don’t let bearing issues slow down your operations. Whether you need a single unit for emergency repair or bulk quantities for production, we’re ready to fulfill your order. Send us your requirements, and our technical team will confirm compatibility with your gearbox or equipment—ensuring you get the right bearing the first time.
Frequently Asked Questions
Q: Are these genuine NTN bearings?
A: Yes, we are an authorized supplier of genuine NTN bearings, with full traceability to ensure authenticity.
Q: How do I confirm if the 21307 fits my gearbox?
A: Provide your equipment model or gearbox specifications, and our technical team will verify compatibility at no cost.
Q: What is the warranty period for this bearing?
A: All NTN bearings come with a 12-month warranty from the date of delivery, covering manufacturing defects.
Q: What is the minimum order quantity?
A: We accept 1 piece MOQ for standard bearings, ideal for emergency repairs or small-scale needs.
Q: How long does shipping take?
A: Sample orders ship in 3-5 working days; bulk orders take 5-15 working days depending on quantity.
Q: How can I verify the bearing's authenticity?
A: Each bearing includes NTN's original packaging and serial number, which can be cross-checked via NTN's official channels.
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