
INA NKI55/25-TV-XL needle roller bearing
- Brand
- INA
- 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.
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
INA NKI55/25-TV-XL is a reference of needle roller bearing, within Bearings. Request a quote for NKI55/25-TV-XL via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
The INA needle roller bearing of the NKI series with TV and XL suffixes is a radial bearing with high load capacity in a very small space. It is used when the design calls for a small outer diameter and a limited width, but radial loads are demanding. MR Accesorios Industriales sells this INA line, a brand MR sells, with technical advice to choose the correct size.
The NKI series designation reads in blocks: the letters NKI identify a needle roller bearing with machined inner and outer rings, suitable for high radial loads. The first number after the letters indicates the bore diameter and the second, separated by a slash, the overall width. The TV and XL suffixes appear in the examples NKI5/12-TV-XL, NKI6/16-TV-XL or NKI25/20-TV-XL: TV indicates the polyamide cage and XL the higher load capacity execution of the current generation. Send the complete part number to identify the exact variant.
These bearings are used in Argentine industries where radial space is critical: machine tools, pumps, compressors, gearboxes, power transmission equipment and lifting mechanisms. They also appear in conveyor rollers, textile machines, packaging equipment and linear guide systems. In food and beverage, paper, petrochemical and automotive plants they are chosen for their rigidity and their ability to withstand radial loads with a thin mounting profile.
To select the correct bearing, take into account the shaft diameter, the available width and the expected radial load. The NKI series accepts grease or oil lubrication; in applications with contamination, evaluate seals or external protections. Mounting is done with an interference fit on the shaft and in the housing according to the type of load, taking care with alignment so as not to load the edges of the needles. The TV cage and the XL execution influence the limiting speed and the load capacity: check the data sheet for each size.
As for equivalents, needle roller bearings are identified by their standardized designation, but each manufacturer may use its own suffixes for cage, tolerance or execution. When looking for a replacement, compare bore diameter, outer diameter, width and load capacity, not just the part number. MR Accesorios Industriales can advise you on interchangeability within the INA line and with other equivalent brands, without compromising the performance of the assembly.
If you need to request a quote for an INA needle roller bearing of the NKI series, send the complete part number by WhatsApp to MR Accesorios Industriales. With the model and the quantity, we will reply shortly with the corresponding reference and the mounting and lubrication recommendations for your application.
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 do the TV and XL suffixes mean in an NKI bearing?
- TV indicates that the bearing has a polyamide cage, and XL identifies the higher load capacity execution of the current generation. These suffixes may vary depending on the size; that is why it is best to send the complete part number to confirm the exact variant.
- How do I choose between the different sizes of the NKI series?
- Take into account the shaft diameter, the available radial space and the radial load the bearing must withstand. The NKI designation includes the bore diameter and the width; with that data and the application, the right size is defined.
- Do NKI needle roller bearings require maintenance?
- Yes. Grease or oil lubrication must be renewed according to the working conditions, and in dusty or humid environments seals or protections should be evaluated. Correct alignment during mounting also extends the service life of the bearing.

