NTN #4T-JS3549A/JS3510 tapered roller bearing

NTN #4T-JS3549A/JS3510 belongs to tapered roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for #4T-JS3549A/JS3510 and any equivalents.

For applications that combine radial and axial loads in one direction, the NTN J series tapered roller bearing is a common choice. Its tapered geometry creates linear contact that spreads the load over a wider area, which supports high load capacity and rigidity. You will find these bearings in gearboxes, wheel shafts and industrial machinery where precision and durability matter. MR Industrial Accessories supplies them and can quote the exact reference you need.

The code on a J series bearing tells you what you are holding. Take 4T-JS3549A/JS3510: the 4T prefix points to a special execution, JS marks the tapered roller series, and the blocks 3549A and 3510 define the cup and cone dimensions and design. Reading the designation this way speeds up selection and helps avoid a wrong replacement.

These bearings appear in gearboxes, speed reducers, transmission shafts, conveyor rollers, road machinery, and agricultural and automotive equipment. Because they take combined loads, they suit demanding environments such as cement plants, mining, steelmaking and ports. The J series performs reliably under high load and moderate speed conditions.

Selecting the right bearing starts with the radial and axial load, the operating speed and the surrounding conditions. Check the sealing arrangement: open bearings need external lubrication and protection from contaminants, while sealed versions reduce maintenance work. Mounting must ensure precise alignment and correct internal clearance, since a poor adjustment shortens service life. Use grease or oil that matches the temperature and load.

Tapered roller bearings from different brands can be interchangeable when dimensions and tolerances match. Always verify the complete code and technical specifications before swapping brands. NTN products comply with international standards. If you are replacing an existing bearing, send us the original code and we will help you identify the equivalent reference.

To request a quote for the NTN J series bearing you need, send the part number or the dimensions to MR Industrial Accessories via WhatsApp or email. We reply promptly and can advise you on the designation or mounting if anything is unclear.