TIMKEN LM78310C tapered roller bearing cup

TIMKEN LM78310C belongs to tapered roller bearing cup, 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 LM78310C and any equivalents.

The TIMKEN LM series cup is the outer ring of a tapered roller bearing, the raceway that presses into the housing and carries the rollers. It only works together with its matching cone, which holds the inner ring, rollers and cage. This arrangement suits equipment that combines radial and axial loads and needs a rigid, accurate fit, such as gearboxes, machine shafts and industrial transmissions.

Reading the LM code helps you order correctly. The letters mark the dimension family, and the number that follows sets the size inside that family. In LM78310C, the trailing C identifies a cup variant and does not change the dimensions. Because cup and cone are chosen separately, the cup number by itself will not build the bearing; it has to be matched to its cone. If you have the assembly number or the cone number, send it and we will check the pairing.

These cups show up in gearboxes and gear cases, machine tool shafts, material handling equipment, industrial vehicle transmissions and agricultural machinery. They also serve in pumps, fans and conveyors where the bearing sees combined load. As a wear part, the cup is replaced by part number and normally goes in together with its cone, and often with the seals and lubricant of the assembly.

Selection starts from the cup-cone pair specified by the manufacturer, since dimensions and contact angle are calculated as a set. When fitting the cup, press it into the housing with the specified interference and seat it against the shoulder; heating the housing or using the right tool is preferred, and the raceway should never be struck. Axial clearance is set while assembling the set, and lubrication and sealing must cover the rolling area to keep contamination out.

Cups from different brands can replace one another when the standardized dimensions and contact angle agree; part numbers do not always match one to one across brands. To replace a TIMKEN cup, compare outside diameter, width and radius, not just the number. We cross-reference that data and point out a compatible alternative when one exists.

For an LM series cup or its cone, message us on WhatsApp with the part number or the equipment model. We will quote the part and, where the application allows, suggest a compatible option. We support bearing replacement in plants and workshops across the United States, Canada, Mexico and South America.