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Single Row Cylindrical Roller Bearings

ZHIO® cylindrical roller bearings have many designs, dimension series and sizes. The majority is single row bearings with a cage. Single and double row full complement bearings (without cage) complete the ZHIO® standard assortment for general engineering. Bearings with a cage can accommodate heavy radial loads and operate at high speeds. Full complement cylindrical roller bearings are suitable for very heavy radial loads at moderate speeds.

The rollers of ZHIO® cylindrical roller bearings are key components. Their geometry, the so-called logarithmic profile, provides an optimum stress distribution in the contact zones in the bearing. Their surface finish maximizes lubricant film formation and optimizes rolling motion of the rollers. The benefits derived from this compared with traditional designs include enhanced operational reliability and a greater insensitivity to misalignment.

The range of ZHIO® cylindrical roller bearings comprises the basic types.
ZHIO® single row cylindrical roller bearings, caged, mainly of the NU, NJ, NUP and N designs.
ZHIO® double row cylindrical roller bearings, caged, mainly of the NNUand NN designs.
ZHIO® single row full complement cylindrical roller bearings, mainly of the NCF and NJG designs.
ZHIO® double row full complement cylindrical roller bearings, mainly of the NNF design.

ZHIO® cylindrical roll bearings have the following design features:
1. Optimized design in ribs and rollers to enhance the axial load capacity
2. Optimized design in the geometric surface between rollers and raceway to balance the radial load distribution
3. Limit the width of raceway undercut, increase the contact area between raceway and rollers and enhance the radial load capacity
4. High standard material, strictly control the element content, e.g. Ti<30ppm
5. Low noise design, reaches to V1 grade noise level, contributes to the quieter running of automobile engine and gearbox.

Dimension(mm) Radial Load
Model inside Outside Height Dynamic Static Maximum Speed Weight
NU 1052 M 260 mm 400 mm 65 mm 720 kN 965 kN 29.3 kg
NJ 2252 MA 260 mm 480 mm 130 mm 1790 kN 3000 kN 112 kg
NJ 1052 ML 260 mm 400 mm 65 mm 720 kN 965 kN 30 kg
NUP 248 MA 240 mm 440 mm 72 mm 952 kN 1370 kN 53 kg
NUB 248 MA 240 mm 440 mm 120 mm 952 kN 1370 kN 60 kg
NU 348 ML 240 mm 500 mm 95 mm 1540 kN 2120 kN 94.5 kg
NU 348 MA 240 mm 500 mm 95 mm 1450 kN 2000 kN 94.5 kg
NU 348 M 240 mm 500 mm 95 mm 1450 kN 2000 kN 94.5 kg
NU 2348 ECML 240 mm 500 mm 155 mm 2750 kN 4000 kN 137 kg
NU 2348 ECMA 240 mm 500 mm 155 mm 2600 kN 3650 kN 154 kg
NU 2248 MA 240 mm 440 mm 120 mm 1450 kN 2360 kN 84 kg
NU 1048 ML 240 mm 360 mm 56 mm 600 kN 800 kN 19.7 kg
NU 1048 M 240 mm 360 mm 56 mm 600 kN 800 kN 20.3 kg
NJ 2348 ECML 240 mm 500 mm 155 mm 2750 kN 4000 kN 151 kg
NJ 2248 MA 240 mm 440 mm 120 mm 1450 kN 2360 kN 86 kg
313221 240 mm 440 mm 120 mm 1570 kN 2500 kN 82.2 kg
NUP 244 ECML 220 mm 400 mm 65 mm 1060 kN 1290 kN 37.7 kg
NUP 244 ECM 220 mm 400 mm 65 mm 1060 kN 1290 kN 38.8 kg
NU 344 M 220 mm 460 mm 88 mm 1210 kN 1630 kN 75 kg
NU 2944 ECMA 220 mm 300 mm 48 mm 457 kN 830 kN 10.2 kg
NU 244 ECML 220 mm 400 mm 65 mm 1060 kN 1290 kN 36.8 kg
NU 244 ECM 220 mm 400 mm 65 mm 1060 kN 1290 kN 37.1 kg
NU 2344 ECN1MA 220 mm 460 mm 145 mm 2380 kN 3450 kN 124 kg
NU 2344 ECML 220 mm 460 mm 145 mm 2380 kN 3450 kN 118 kg
NU 2344 ECMA 220 mm 460 mm 145 mm 2380 kN 3450 kN 124 kg
NU 2244 ECML 220 mm 400 mm 108 mm 1570 kN 2280 kN 59 kg
NU 1044 ML 220 mm 340 mm 56 mm 570 kN 735 kN 18.3 kg
NU 1044 M 220 mm 340 mm 56 mm 570 kN 735 kN 19 kg
NJ 244 ECML 220 mm 400 mm 65 mm 1060 kN 1290 kN 36.8 kg
NJ 244 ECM 220 mm 400 mm 65 mm 1060 kN 1290 kN 38.2 kg
NJ 2244 ECML 220 mm 400 mm 108 mm 1570 kN 2280 kN 60.2 kg
NJ 1044 ML 220 mm 340 mm 56 mm 570 kN 735 kN 18.8 kg
NUP 240 ECM 200 mm 360 mm 58 mm 850 kN 1020 kN 27.7 kg
NU 340 ECML 200 mm 420 mm 80 mm 1230 kN 1630 kN 57.2 kg
NU 240 ECML 200 mm 360 mm 58 mm 880 kN 1060 kN 26.5 kg
NU 240 ECM 200 mm 360 mm 58 mm 850 kN 1020 kN 26.4 kg
NU 2340 ECML 200 mm 420 mm 138 mm 1980 kN 2800 kN 92.4 kg
NU 2240 ECML 200 mm 360 mm 98 mm 1370 kN 1800 kN 43.8 kg
NU 1040 ML 200 mm 310 mm 51 mm 440 kN 570 kN 13.9 kg
NJ 340 ECML 200 mm 420 mm 80 mm 1230 kN 1630 kN 56.3 kg