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Tapered roller bearing FAG K399-AS-394-A
- Manufacturer Part Number
- K399-AS-394-A
- Brand
- FAGOfficial brand
- Category
- Bearings
- Subcategory
- Tapered roller bearings
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Description
FAG K399-AS-394-A is a tapered roller bearing reference, within Bearings. Request a quote for K399-AS-394-A via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.
The FAG tapered roller bearing is a component designed to support combined radial and axial loads, with a geometry that allows linear contact between rollers and raceways. It is used in applications where significant forces must be transmitted and shaft alignment maintained, such as gearboxes, transmission equipment and industrial machinery. MR Accesorios Industriales sells this line as an official brand, with technical advice to choose the correct designation.
The designation K399-AS-394-A reads as a tapered roller assembly made up of a matching cup and cone. The letters and numbers indicate dimensions and design variants: the prefix K usually denotes a complete assembly, while suffixes such as AS or A refer to modifications in the contact angle, radius or surface treatment. To interpret each case, it is best to follow the examples in the series and check the exact part number shown on the drawing or on the original part.
In Argentine industry, these bearings appear in speed reducers, road machinery axles, material handling equipment, process pumps and drives in cement, food or metallurgical plants. They are also found in the agro-industrial sector, in seeders and harvesters, where combined loads and demanding working conditions require high load capacity and good axial rigidity.
To select the correct bearing, radial and axial load, rotational speed and type of lubrication must be considered. Mounting requires verifying raceway alignment, internal clearance and tightening of components. Adequate sealing prevents contamination by dust or particles, while lubrication with grease or oil of appropriate viscosity extends service life. In two-bearing assemblies, preload and axial adjustment are critical to performance.
Tapered roller bearings are manufactured under interchangeability standards that allow replacing one unit with another from a different manufacturer if the main dimensions and contact angle match. However, not all part numbers are equivalent: tolerances and suffixes can vary between brands. Therefore, before replacing a component, it is advisable to verify the measurements and consult a specialist.
If you need a quote for a FAG tapered roller bearing, send the part number K399-AS-394-A or the model shown on your equipment by WhatsApp. At MR Accesorios Industriales we reply shortly with the technical information and availability so you can move forward with your maintenance.
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 designation K399-AS-394-A mean?
- It is a tapered roller assembly part number. The letter K indicates that it is a complete assembly, while the numbers and the suffixes AS and A refer to dimensions and design variants. To interpret it precisely, it is best to check the drawing or the original part.
- How do I know if this bearing is compatible with my equipment?
- You must verify the main dimensions, the contact angle and the type of mounting. Interchangeability between brands exists if those parameters match, but suffixes can change the behavior. Send the part number and measurements by WhatsApp so we can advise you.
- What lubrication is suitable for a tapered roller bearing?
- It depends on speed, load and environment. Grease or oil with adequate viscosity is used, and keeping cleanliness and sealing is key. For demanding applications, circulating lubrication helps dissipate heat. Ask us about your particular case.

