High Precision NTN Spherical Roller Bearing 21307 35x80x21mm for Gearbox Long Life

Product Specifications

Application Industries

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

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