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Spherical roller bearing FAG 249/670-B-K30-MB
- Manufacturer Part Number
- 249/670-B-K30-MB
- Brand
- FAGOfficial brand
- Category
- Bearings
- Subcategory
- Spherical roller bearings
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Description
FAG 249/670-B-K30-MB is a spherical roller bearing reference, within Bearings. Request a quote for 249/670-B-K30-MB via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.
FAG spherical roller bearings are self-aligning double row components designed to withstand high radial loads and axial loads in both directions, even with shafts that experience flexing or misalignment. Their spherical outer raceway allows the assembly to self-align, making them suitable for demanding applications in mining, cement, steel and other Argentine industries where working conditions are severe and lubrication may be critical.
The designation of these bearings is read in blocks. The numeric prefix, as in 241/710-B-K30-MB, indicates the dimension series; the suffix B corresponds to the design with flange or cage variant according to the standard; K30 indicates a tapered bore with 1:30 taper, intended for mounting on an adapter sleeve; and MB identifies the machined brass cage, guided by the inner ring. In 249/670-B-K30-MB the same scheme is repeated: series, variant B, K30 taper and MB cage. Knowing these suffixes is key to ordering the correct replacement.
In Argentine industry, these bearings are used in grinding equipment, rotary kilns, conveyor belts, large gearboxes and machinery for cement, mining and steelmaking. They also appear in applications where the shaft flexes under load or where alignment between supports is not perfect, such as vibrating screens and crushers. Their ability to withstand combined loads and misalignment makes them a frequent choice in continuous process plants, where an unscheduled stoppage has a high cost.
To select the right bearing, take into account the radial and axial load, the rotational speed and the environmental conditions. Sealing is essential: if there is dust or moisture, variants with seals or protectors should be evaluated. Lubrication must be as specified by the manufacturer, with the correct amount and type of grease or oil. In assemblies with a tapered bore, internal clearance is adjusted during mounting on the adapter sleeve; verify the reduction of radial clearance according to the procedure. Initial alignment and temperature monitoring during operation help detect problems.
When looking for equivalences between brands, remember that designations may vary in suffixes, although the main dimensions usually match. Do not rely on the part number alone: verify series, taper, cage and bore type. In spherical roller bearings, interchangeability between manufacturers is possible if dimensions and service conditions are respected. To be sure, consult us by providing the complete part number and working conditions.
If you need this type of bearing, write to us on WhatsApp with the part number or model you are looking for. At MR Accesorios Industriales we will reply shortly with the technical information and the corresponding quote. We work with leading brands and can advise you to choose the right variant for your equipment. Do not hesitate to contact us: we are here to help you keep your production running.
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 does the K30 suffix mean on these bearings?
- The K30 suffix indicates that the bearing has a tapered bore with 1:30 taper. This allows it to be mounted on an adapter sleeve or directly on a tapered shaft, and to adjust internal clearance during mounting. It is important to follow the clearance reduction procedure recommended by the manufacturer.
- How do I know if I need a bearing with an MB cage?
- The MB cage is made of machined brass, guided by the inner ring. It is used in highly demanding applications, where greater resistance to temperature and stress is required. If your original equipment comes with this cage, it is advisable to maintain the same specification to ensure performance.
- Can I replace a FAG bearing with another brand?
- In many cases yes, as long as the main dimensions, bore type, taper and cage design match. Designations may vary between manufacturers, so it is essential to verify the technical data sheet. Provide the complete part number and working conditions so we can advise you.

