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FAG cylindrical roller bearing · FAG NJ421-XL-M1
FAG NJ421-XL-M1 cylindrical roller bearing

FAGBrand we market

FAG NJ421-XL-M1 cylindrical roller bearing

Manufacturer Part NumberNJ421-XL-M1Also searched as: NJ421XLM1 · NJ421 XL M1FAG NJ 4 series: dimension table →
Brand
FAG
Category
Bearings
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Since 1945 · Martínez, Buenos Aires, Argentina

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How to read FAG NJ421-XL-M1

NJ 4Series
Cylindrical roller bearings, NJ 4 series. For the same bore, each series has a different outside diameter and width.
21Bore
105 mm bore: 21 × 5.
XL-M1Suffix
FAG suffix: it defines the variant (sealing, cage, internal clearance or other features).

NJ 421 is the standard (ISO) basic designation: it defines the type, the series and the bore.

Description

FAG NJ421-XL-M1 is a reference of cylindrical roller bearing, within Bearings. Request a quote for NJ421-XL-M1 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The FAG NJ series cylindrical roller bearing is a component with high radial load capacity, designed to withstand heavy loads and considerable speeds. Its brass cage construction and single-row design make it suitable for demanding industrial applications where precision and durability are key. MR Accesorios Industriales carries this line as part of its bearing offering for the Argentine market.

The NJ series designation is interpreted as follows: the letters NJ indicate that the bearing has one rib on the inner ring and two ribs on the outer ring, which allows axial guidance in one direction. The XL suffix indicates the X-life design, with optimized surfaces for longer service life. The final letter M refers to the machined brass cage. For example, part number NJ406-XL-M1 corresponds to a bearing in the 406 series with these characteristics.

These bearings are used in a wide variety of industrial applications in Argentina, such as gearboxes, pumps, compressors, fans and machine tools. Their ability to withstand high radial loads makes them common in the metallurgical, cement, mining and power transmission industries. They are also found in continuous process equipment, where reliability is essential.

To correctly select an NJ bearing, it is important to consider the radial and axial load it will withstand, as well as the rotational speed and environmental conditions. Mounting requires precise alignment between shaft and housing, and the appropriate fits are recommended to avoid deformation. Lubrication, whether with grease or oil, must be chosen according to the temperature and operating speed. Sealing will depend on the presence of contaminants.

Regarding equivalences and interchangeability, FAG NJ series cylindrical roller bearings can be replaced by products from other brands that follow the same designation and standardized dimensions. It is essential to verify tolerances and internal clearance to ensure correct operation. MR Accesorios Industriales carries the FAG brand as part of its bearing line, and can advise you on the best option for your application.

If you need a FAG NJ series cylindrical roller bearing, write to us on WhatsApp with the part number or model you require. At MR Accesorios Industriales we will reply shortly with the information you need for your equipment.

Dimensions

Bore
105mm

Frequently Asked Questions

What does the NJ designation mean in a FAG bearing?
The NJ designation indicates that the bearing has one rib on the inner ring and two on the outer ring, which allows axial guidance in one direction. It is a common configuration in cylindrical roller bearings for high radial loads.
How do I choose the right NJ bearing for my application?
To choose the right NJ bearing, take into account the radial and axial load, the rotational speed and the environmental conditions. Also consider the type of lubrication and sealing. If you have doubts, ask us on WhatsApp with your equipment data.
Are FAG NJ bearings interchangeable with other brands?
Yes, FAG NJ series cylindrical roller bearings can be interchanged with products from other brands that share the same designation and standardized dimensions. Always verify tolerances and internal clearance before replacing.
Request a quote for NJ421-XL-M1 via WhatsApp
Request a quote on WhatsApp