NTN NK32/20R＋IR28×32×20 needle roller bearing

NTN NK32/20R＋IR28×32×20 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 NK32/20R＋IR28×32×20 and any equivalents.

The NTN NK+IR series is a needle roller bearing assembly made up of a machined outer ring with needles plus a separate inner ring. It fits where radial room is tight but the bearing still has to carry radial load. Typical homes for it are gearboxes, pumps, compressors and power transmission equipment. MR Industrial Accessories supplies this NTN line to customers in the United States and Latin America.

Reading the code helps you order the right piece. The NK portion is the outer ring assembly with no inner ring: the number before the slash is the bore of the outer ring in millimeters and the number after it is the width, so NK14/20R measures 14 mm bore by 20 mm width. The R at the end means the outer ring carries a lubrication groove and hole. The +IR portion names the inner ring that ships with it, given as bore × outside diameter × width, such as IR10×14×20. Put together, NK14/20R＋IR10×14×20 is a complete unit with a 10 mm bore inner ring.

This design suits positions where radial space is limited and the load is mostly radial. You will see it in gearboxes, gear pumps, screw compressors, textile machinery, bottling lines and machine tool drives, as well as in seeders, combine harvesters and material handling equipment. Its capacity is high for such a thin section, and because the inner ring comes off, mounting is simpler on shafts that cannot be used directly as a needle raceway.

Selection comes down to shaft diameter, outer diameter and the width you have room for. Choose NK+IR when the shaft is neither hardened nor ground and an inner ring is required to serve as the raceway. Look at how the bearing will be lubricated: the R version lets grease enter through the outer ring, which helps where centralized lubrication is in place. At mounting, keep the rings aligned and avoid impacts that could mark the needles, and make sure seat tolerance and internal clearance match the load and running speed.

NTN needle roller bearings interchange with other brands that use the same dimensional nomenclature, so a part number from another maker can usually be matched to an equivalent. The NK+IR series is made from quality steel with heat treatments that support fatigue resistance. When you ask for a quote, include the full part number with the inner ring so the correct assembly is confirmed.

Send your NTN NK+IR part number or the dimensions you are working with by WhatsApp or email. The MR Industrial Accessories team answers promptly, points you to a compatible alternative when that helps, and can advise on mounting and lubrication so the bearing runs under the right conditions.