
SKF NKIS 55 needle roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Needle roller bearing
We respond promptly.
Since 1945 · Martínez, Buenos Aires, Argentina
Request your quote via WhatsApp or email, with the quantity you need.
Other brands in this category
Ask us about alternatives. Equivalence is verified for each reference and application.
Can't find the exact model? Write to us with the part number or model you're looking for: we'll find it and quote it, even if it's not listed in the catalog.
Description
SKF NKIS 55 is a reference of needle roller bearing, within Bearings. Request a quote for NKIS 55 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
The SKF NKIS series needle roller bearing is a radial bearing with an inner ring and steel cage, designed to withstand high radial loads in tight spaces. It is used in applications where the radial section is limited and high load capacity is required, such as machine tools, transmission equipment and industrial mechanisms. MR Accesorios Industriales sells this series.
The NKIS series designation is interpreted as follows: the letters NK indicate a needle roller bearing with an inner ring, the I indicates that the inner ring is integrated, and the S corresponds to the steel cage. The number that follows identifies the bore diameter. The series covers standardized sizes for each size. When choosing, verify that the part number matches the dimensions of your shaft and housing.
These bearings are used in industries such as metalworking, food, textile and plastics. They are common in gearboxes, pumps, compressors, machine tools and power transmission equipment. In Argentina, they are found in production lines, conveyors and agricultural machinery. Their compact design allows them to be mounted in spaces where other bearings do not fit, while maintaining high radial load capacity.
To select the right bearing, take into account the radial load, the rotational speed and the environmental conditions. Sealing is essential: if there is dust or moisture, consider additional protection. Lubrication must be suitable for the operating speed and temperature. During mounting, ensure correct alignment between shaft and housing to avoid undue axial loads. The steel cage provides robustness and heat dissipation.
As for equivalents, needle roller bearings with an inner ring from other brands can be interchanged if the dimensions and load capacity match. Always verify the tolerances and internal clearance. The SKF NKIS series is a reliable reference, but alternatives exist on the market. Consult us if you need help finding the right replacement.
To request a quote for the SKF NKIS series needle roller bearing you need, send us the part number on WhatsApp. At MR Accesorios Industriales we advise you so you choose the right option for your application. We distribute industrial products in Argentina.
Dimensions
Dimensions and tolerances: Send us the part number via WhatsApp and we'll confirm the dimensions and version against the manufacturer's data sheet.
Frequently Asked Questions
- What does the abbreviation NKIS mean in a needle roller bearing?
- NKIS indicates a needle roller bearing with an inner ring and steel cage. The N and the K correspond to needle roller bearing, the I to the integrated inner ring and the S to the steel cage. The number that follows identifies the bore diameter, as in NKIS 20 or NKIS 30.
- How do I choose the right NKIS bearing for my machine?
- Consider the radial load, the speed and the available space. Verify that the bore diameter matches your shaft. If there are contaminants, add seals. Lubrication must be compatible with the speed and temperature. If you have doubts, send us the dimensions on WhatsApp and we will advise you.
- Are SKF NKIS bearings interchangeable with other brands?
- Yes, as long as the main dimensions and load capacity match. International standards allow interchangeability between manufacturers. Still, verify tolerances and internal clearance. If you need help finding the equivalent, consult us with the original part number.

