NTN 4T-LM78349/LM78310C tapered roller bearing

NTN 4T-LM78349/LM78310C 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-LM78349/LM78310C and any equivalents.

Tapered roller bearings in the NTN J series are built to carry radial and axial loads at the same time. Because the cone and cup are separate, mounting adjustment is possible, which suits equipment that needs rigidity and load capacity. You will find them in industrial machinery, automotive assemblies and transmission equipment. MR Industrial Accessories LLC supplies this line to customers throughout the United States and in several Latin American countries.

Reading the code helps you order the right piece. Take 4T-LM78349†/LM78310C††: this is a cone and cup set. The 4T- prefix marks the series, LM points to the tapered roller family, and the digits that follow set dimensions and angles. Suffixes like C or † signal design variants, whether in contact angle or finish. Once you know how the code is built, matching a bearing to an application becomes straightforward.

Typical users include automotive, metallurgy, cement and food processing operations. Gearboxes, transmission shafts, kiln rollers, pumps and industrial fans are common homes for these bearings. Combined load support is what makes them a fit for equipment that sees changing stress, as is usual on production lines and in maintenance shops.

Selection comes down to radial load, axial load, speed and the conditions around the bearing. Sealing and lubrication deserve attention: match the lubricant to the temperature and to how much contamination is present. At mounting, alignment and axial adjustment need to be precise, otherwise failures show up early. Check internal clearance against what the equipment calls for.

NTN J series bearings can be swapped with other brands that share the same dimensions and tolerances. Bring us a code from another maker or a part you cannot identify, and we will point you to the equivalent. Since interchangeability rests on dimensions and contact angle, confirm both before you install a replacement.

For a quote, send the code or the exact size through WhatsApp or email and our team will get back to you promptly. If you need a particular variant, include the model and we will help you choose, including suggesting equivalents when that makes sense.