This page covers 9 IKO NURT Series cylindrical roller followers (track rollers) (NURT15-1R to NURT45-1R, 15 to 45 mm bore): full complement cylindrical rollers, shield type construction and a crowned outer ring. Choose the size in the options above; each variant has its own dimensions and ratings in the Model Details. The NURT series is the cylindrical roller follower: double rows of full complement cylindrical rollers in the outer ring take large radial loads, and the outer ring is guided axially by the outer ring shoulder and the end faces of the cylindrical rollers. A roller follower (track roller) is a bearing designed for outer ring rotation, with rollers inside a thick-walled outer ring. The outer ring runs directly on the mating cam guide surface, and roller followers are widely used in cam mechanisms and in linear motions of conveying equipment. In the part number, R marks the crowned outer ring (no R is cylindrical). Every model on this page has a crowned outer ring. Where this product is used Cam mechanisms, with the outer ring running directly on the cam guide surface Linear motions of conveying equipment Follower and track roller positions on a shaft Features Cylindrical roller follower with inner ring: double rows of full complement cylindrical rollers in the outer ring can withstand large radial loads Full complement cylindrical rollers: the outer ring is guided axially by the outer ring shoulder and the end faces of the rollers Shield type: narrow clearances between the side plates and the outer ring form labyrinths Crowned outer ring (R): moderates the edge load caused by mounting errors Prepacked with grease Basic dynamic load rating C 23,400 to 91,500 N and static load rating C0 27,300 to 135,000 N (each size in the Model Details) Track capacity 3,910 to 12,400 N on a 40 HRC mating surface Key specifications Specification Detail Type Cylindrical roller follower (track roller) with inner ring Models NURT15-1R to NURT45-1R (9 sizes) Bore (shaft) diameter d 15 to 45 mm Outer ring diameter D 42 to 100 mm Width B 19 to 32 mm Outer ring width C 18 to 30 mm Rolling elements Full complement cylindrical rollers, double row in the outer ring Seal Shield type: narrow clearances between the side plates and the outer ring form labyrinths Outer ring Crowned outer ring (R in the part number) Basic dynamic load rating C 23,400 to 91,500 N Basic static load rating C0 27,300 to 135,000 N Maximum allowable static load 27,200 to 135,000 N Track capacity (mating surface 40 HRC) 3,910 to 12,400 N Lubrication Prepacked with grease Recommended shaft tolerance (metric series) g6 or h6 Brand IKO (Nippon Thompson Co., Ltd., Japan) Available sizes Model Bore d (mm) OD D (mm) Width B (mm) Width C (mm) a (mm) C (N) C0 (N) Mass (g) NURT15-1R 15 42 19 18 20 23,400 27,300 160 NURT17-1R 17 47 21 20 22 25,200 30,900 222 NURT20R 20 47 25 24 27 38,900 49,000 245 NURT20-1R 20 52 25 24 27 38,900 49,000 321 NURT25-1R 25 62 25 24 31 43,100 58,100 450 NURT30R 30 62 29 28 38 58,200 75,300 466 NURT30-1R 30 72 29 28 38 58,200 75,300 697 NURT35-1R 35 80 29 28 44 63,900 88,800 840 NURT45-1R 45 100 32 30 53 91,500 135,000 1,400 C is the basic dynamic load rating and C0 the basic static load rating; a is the mating seating dimension. Selecting the right option The options on this page are the outside diameter (D, in mm), the width (B, in mm) and the shaft diameter (bore d, in mm). Two models can share a bore, for example the plain size and the -1 size, with different outside diameters: check D against your cam track. This page is the crowned outer ring type (R in the part number). The crowned ring is effective in moderating the edge load caused by mounting errors. Fitting and use For the shield type, match the side surface correctly to the mating seating surface given by dimension a in the Model Details and fix it. The mounting part should make even contact with the entire side plate surface: uneven contact may increase rotational torque and shorten the service life. Keep the oil hole of the inner ring out of the loading zone, which can lead to a short bearing life. Recommended shaft tolerance for the metric series is g6 or h6. Lubrication: the models on this page are prepacked with grease. Track capacity is the load that can be applied continuously on a steel cam guide surface of 40 HRC without deforming or indenting it. For a different hardness it is multiplied by the track capacity factor (0.45 at 30 HRC): ask AIMS if you need the factor for your guide surface. If you are unsure which size suits your cam track and mounting, send AIMS the part number or the dimensions and we will help you confirm it. Related products Other IKO NURT series pages (other outer ring, rolling element, seal or material types): NURT series cylindrical roller followers, full complement, shield type, cylindrical, 15 to 50 mm bore. Related roller followers: NART series roller followers, full complement, sealed, crowned, 5 to 50 mm bore and NAST series separable roller followers, with cage, sealed (ZZUU), crowned, 6 to 50 mm bore.
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