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Tapered roller bearing cup TIMKEN LM78310C
- Manufacturer Part Number
- LM78310C
- Brand
- TIMKENOfficial brand
- Category
- Bearings
- Subcategory
- Tapered roller bearings
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Description
TIMKEN LM78310C is a tapered roller bearing cup reference, within Bearings. Request a quote for LM78310C via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.
The TIMKEN LM series tapered roller bearing cup is the removable outer ring of a tapered bearing: the raceway on which the rollers roll and which is press-fitted into the housing. It is combined with its corresponding cone to form the complete assembly. It is used in equipment with combined radial and axial loads, and where rigidity and precise fit are required, such as gearboxes, machine shafts and industrial transmissions.
The LM series designation is read in blocks: the letters identify the dimension family and the number that accompanies them defines the size within that family. In the LM78310C cup, the final C indicates a variant of the cup itself, not a change in dimensions. Since the cup and cone are selected separately, the cup part number alone is not enough to assemble the bearing: it must be cross-referenced with the corresponding cone. If you have the complete assembly part number or the cone part number, send it and we will verify it.
In Argentine industry, these cups appear in gearboxes and gear cases, machine tool shafts, material handling equipment, industrial vehicle transmissions and agricultural machinery. They are also replaced in pumps, fans and conveyors where the bearing works under combined load. As a wear part, replacement is done by part number: the cup is changed together with its cone and, in many cases, with the seals and lubricant of the assembly.
To properly select a cup, the cup-cone pair indicated by the manufacturer must be respected, because the dimensions and contact angle are calculated as a set. During assembly, the cup is fitted into the housing with the indicated interference and seated against the shoulder; it is advisable to heat the housing or use the appropriate tool, never strike the raceway. Axial clearance is adjusted when assembling the set, and lubrication and sealing must cover the rolling area to prevent contamination.
Between brands, tapered roller cups are interchangeable when standardized dimensions and contact angle match; the part number of one brand does not always correspond one-to-one with that of another. Therefore, to replace a TIMKEN cup, it is advisable to compare outside diameter, width and radius dimensions, and not just the part number. At MR Accesorios Industriales we cross-reference that data and indicate the compatible alternative when available.
If you need an LM series cup or its corresponding cone, write to us on WhatsApp with the part number or the equipment model. At MR Accesorios Industriales we will quote the part and, if the application allows, indicate the compatible alternative. With more than 80 years in the industry, we support bearing replacement in plants and workshops throughout the country.
This description provides guidance on the product type. Check the configuration and dimensions of this reference.
Dimensions
Dimensions and tolerances: Send us the part number via WhatsApp and we'll confirm dimensions, sealing, and internal clearance against the manufacturer's data sheet.
Frequently Asked Questions
- What is the difference between the cup and the cone of a tapered bearing?
- The cup is the outer ring with its raceway; the cone is the inner ring with the rollers and cage. They are mounted separately and form the complete bearing. That is why they must be ordered as a pair: the cup part number alone does not assemble the set.
- How do I request the LM cup I need?
- Send the cup part number, the cone part number or the complete bearing part number via WhatsApp, and if possible the housing dimensions. With that data we will quote the part and indicate the compatible alternative if applicable.
- Can I replace a TIMKEN cup with one from another brand?
- Yes, when standardized dimensions and contact angle match. Part numbers do not always correspond between brands, so it is advisable to compare outside diameter, width and radius before defining the replacement.

