INA NKI70/25-XL needle roller bearing

INA NKI70/25-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 NKI70/25-XL and any equivalents.

The INA NKI-XL is a single-row needle roller bearing built with machined inner and outer rings and a steel cage. Because the radial section is small, it handles high radial loads in positions where a ball bearing or a cylindrical roller bearing would not fit. Typical users are machine tool builders, transmission and pump manufacturers, compressor lines and any plant where radial space is tight and loads are significant.

Reading the code helps when you order. NKI tells you the bearing has a machined inner ring and a machined outer ring, which separates it from series that run directly on the shaft. The figures after the slash link bore and width: NKI9/12-XL means a 9 mm bore with a 12 mm width, and NKI12/20-XL means a 12 mm bore with a 20 mm width. XL marks the current INA design generation, which differs from earlier versions in geometry and surface treatment. Outer diameter and bore follow the standard NKI series for each size.

You will find these bearings in gearboxes, machine tools, positive displacement pumps, compressors, packaging equipment and production lines, and also in automotive and road machinery work. They suit shafts running at moderate and high speeds when lubrication and alignment are handled correctly. Food and beverage plants often pick them when a low-profile bearing with good rigidity is needed.

When selecting a size, work from shaft diameter, radial load and speed. This series has no built-in seal, so in dusty or wet areas plan on external seals or protectors. Grease and oil both work; with circulating oil, check that the flow actually reaches the needle area. Press fitting or induction heating is the usual mounting method, and the edges should never be struck. Shaft and housing alignment has to be accurate, since these bearings do not tolerate angular misalignment well. If the shaft is not hardened, choose a series with an inner ring, as this NKI does.

Needle roller bearings with an inner ring carry similar codes across manufacturers: SKF uses NKI, NTN uses NK, and other European and Asian makers keep dimensionally compatible designations. Before swapping brands, confirm bore, outer diameter and width. Matching dimensions do not automatically mean matching internal clearance or load capacity, so check tolerances on critical equipment. MR Industrial Accessories supplies the INA brand within its bearing range.

To get a quote on an NKI-XL, send the full code by WhatsApp or email to MR Industrial Accessories. With the model and the quantity, the team replies promptly. If you are unsure which series or suffix fits your application, they can point you to the right option and suggest equivalents.