Product Specifications
| Parameter |
Details |
| Model NO. |
21307 |
| Feature |
Long Life, High Speed, Low Noise |
| Specification |
35×80×21mm |
| HS Code |
8482300000 |
| Production Capacity |
500000 |
| Package Size |
5.50cm × 10.00cm × 4.50cm |
| Package Gross Weight |
0.240kg |
Application Industries
| Industry |
Typical Equipment |
| Automotive |
Gearboxes, Transmission Systems |
| Industrial Manufacturing |
Mechanical Fans, Conveyor Systems |
Stop Gearbox Failures with 21307 Spherical Roller Bearing
Car manufacturers and gearbox assemblers know the cost of unexpected bearing failure—downtime, repair delays, and compromised safety. Many struggle with generic bearings that wear prematurely under high loads, or face minimum order quantities that tie up capital. When your production line depends on reliable rotation, choosing the wrong bearing isn’t just an expense; it’s a risk to your reputation.
Engineered for Long Life in Critical Applications
The 21307 Spherical Roller Bearing addresses these challenges with precision engineering. Designed for gearboxes and car industry applications, this 35x80x21mm bearing delivers long life, high speed, and low noise performance—exactly what you need for continuous operation. As a professional bearing manufacturer with decades of export experience, we ensure each unit meets strict quality standards, from raw material inspection to full-process production supervision.
Where This Bearing Performs Best
This spherical roller bearing excels in heavy-duty scenarios where misalignment and radial loads are common. In gearboxes, it handles the dynamic stresses of power transmission, while in automotive applications, it maintains stability even under variable speeds. Its robust design accommodates minor shaft misalignments, reducing wear on adjacent components and extending overall equipment life.
Technical Details That Matter
The 21307’s key specifications directly impact performance. Its 35mm bore diameter and 80mm outer diameter balance load capacity with compactness, making it ideal for space-constrained gearboxes. The 21mm width provides sufficient contact area to support radial loads, while the long-life feature—achieved through high-grade chrome steel and precision manufacturing—ensures consistent operation over extended periods. Low noise properties (Z2/Z3/Z4 grade, as per our production capabilities) make it suitable for noise-sensitive automotive environments.
Why Genuine Bearings Reduce Total Cost
Choosing genuine bearings over counterfeits avoids hidden costs: premature failures, unplanned downtime, and secondary damage to gears or shafts. Our 21307 Spherical Roller Bearing meets ISO, ABMA, and DIN international standards, ensuring compatibility with original equipment. With a 12-month warranty, we stand behind every unit—offering free replacements for qualified defects, so you’re not left covering losses from substandard parts.
Your Trusted Partner for Bearing Solutions
Jinan Saifan Bearing Co., Ltd., founded in 2005, combines decades of manufacturing expertise with a global sales network spanning Europe, North America, Southeast Asia, and the Middle East. Our ISO 9001:2015 and ISO 14001 certifications validate our commitment to quality and environmental responsibility. We offer flexible order policies—1 piece MOQ for standard bearings, 3-5 day sample delivery, and bulk orders shipped within 5-15 working days—so you get the bearings you need, when you need them. Our technical team provides free guidance on selection, installation, and maintenance, ensuring optimal performance from day one.
Packaging & Shipping
- Carton pallet packaging for secure transport
- Sample orders shipped in 3-5 working days
- Bulk orders delivered within 5-15 working days
- Multiple logistics options available (freight details provided upon inquiry)
- 1 piece MOQ for standard bearings; sample orders without MOQ
Get Your 21307 Bearing Today
Don’t let bearing issues slow your production. Whether you need a single sample for testing or bulk orders for manufacturing, we’re ready to fulfill your requirements. Send us your specifications, and our team will confirm availability and provide a quote within 24 hours. The sooner you order, the sooner you can secure reliable performance for your gearboxes and automotive systems.
Frequently Asked Questions
Q: Is this a genuine 21307 Spherical Roller Bearing?
A: Yes, we supply bearings that meet international standards, with strict quality control throughout production. All products are certified and traceable.
Q: How can I confirm if this bearing fits my gearbox?
A: Provide your gearbox model or technical specifications, and our professional team will verify compatibility and offer free selection guidance.
Q: What is the warranty period?
A: We offer a 12-month warranty from the date of delivery, covering manufacturing defects with free replacement or refund for qualified issues.
Q: What is the minimum order quantity?
A: Standard bearings have a 1 piece MOQ; sample orders are available without MOQ, and customized order quantities are negotiable.
Q: How long does shipping take?
A: Sample orders ship in 3-5 working days, bulk orders in 5-15 working days. Logistics options will be confirmed based on your location.
Ready to order or need a quote?
Send your bearing designation, application details, and quantity — we’ll respond within 24 hours.
