NTN NK9/12T2＋IR6×9×12 needle roller bearing

NTN NK9/12T2＋IR6×9×12 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 NK9/12T2＋IR6×9×12 and any equivalents.

The NTN NK+IR series pairs an NK needle roller bearing with an IR inner ring. This setup suits tight radial spaces where radial loads are high. Because the inner ring is included, the shaft does not need hardening or grinding. MR Industrial Accessories LLC supplies this series to customers throughout the United States and in several Latin American countries.

Reading the code helps you order the right part. NK means a needle roller bearing without inner ring, built to standard dimensions. The first number is the bore diameter in millimeters. After the slash comes the width. T2 denotes a polyamide cage. The +IR portion identifies the inner ring, given as inner diameter × outer diameter × width, such as IR5×8×12. So the full designation tells you bore, width and inner ring size.

These bearings appear in machine tools, pumps, compressors, electric motors, transmission equipment and agricultural machinery. You also find them in conveyor rollers, cam systems and oscillating mechanisms. Using the inner ring makes mounting easier on shafts that are not hardened or ground, which can simplify design and lower costs. The arrangement is common where high rigidity and rotational precision are needed.

When selecting, consider radial load and operating speed. The IR inner ring must match the shaft diameter and the bearing width. Lubrication matters: grease or oil both work, and for high-speed use, oil with circulation is suggested. Sealing depends on the environment; in dusty or wet conditions, add external seals or choose a bearing with seals. Keep shaft and housing aligned to prevent parasitic axial loads, and follow the manufacturer's mounting instructions.

Needle roller bearings with inner rings from other brands can be swapped if bore, outer diameter and width match. The NTN NK+IR series is standard and often has equivalents in other catalogs. Always verify tolerances and cage type, since these can differ. For a replacement, compare dimensions and load conditions. MR Industrial Accessories LLC can help you choose a suitable alternative.

To request a quote for an NTN NK+IR series needle roller bearing, send the complete code or your application dimensions via WhatsApp or email. We quote the exact code or size you need and can suggest a compatible alternative if you provide a code from another brand or an unidentified part. Our team replies promptly and assists with selection.