INA NKI30/30-TV-XL needle roller bearing

INA NKI30/30-TV-XL belongs to needle roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for NKI30/30-TV-XL and any equivalents.

When a machine needs to carry heavy radial loads but the space around the shaft is tight, the INA NKI series with TV and XL suffixes is one of the options our customers ask about most. These are radial needle roller bearings built with machined inner and outer rings, sized for narrow mounting positions. As a supplier of INA products, we help buyers match the designation on the drawing to the right variant.

Reading the code helps you order correctly. NKI is the family: a needle roller bearing with machined rings. The number before the slash gives the bore, the number after it gives the overall width. Then come the suffixes: TV for the polyamide cage, XL for the current-generation execution with higher load capacity. Examples include NKI5/12-TV-XL, NKI6/16-TV-XL and NKI25/20-TV-XL. Quote the full string so the exact variant is confirmed.

Typical applications sit where radial room is limited but loads are not light: machine tools, pumps, compressors, gearboxes, power transmission units and lifting mechanisms. You will also find them in conveyor rollers, textile machinery, packaging lines and linear guide systems. Plants in food and beverage, paper, petrochemical and automotive sectors use them for their rigidity and their ability to take radial loads in a thin profile.

Selection comes down to three inputs: shaft diameter, the width you can spare, and the expected radial load. These bearings run with grease or oil. Where contamination is a concern, consider seals or external protection. Mounting normally uses an interference fit on the shaft and in the housing, matched to the load direction, and alignment matters because misalignment loads the needle edges. Cage type and execution affect limiting speed and capacity, so check the data for each size.

On replacements, needle roller bearings follow a standardized designation, but manufacturers apply their own suffixes for cage, tolerance and execution. Compare bore, outer diameter, width and load rating rather than the part number alone. We can advise on interchangeability within the INA range and against equivalent brands so the assembly keeps performing as intended.

To request a quote, send the complete part number and quantity by WhatsApp or email. We reply promptly, and if a size is not the best fit we can suggest equivalents and help you choose.