Super Precision 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
NN 3044 K/SPC3W33 220 mm 340 mm 90 mm 809 kN 1460 kN 28.2 kg
NNU 4940 BK/SPW33 200 mm 280 mm 80 mm 484 kN 1040 kN 15 kg
NNU 4940 B/SPW33 200 mm 280 mm 80 mm 484 kN 1040 kN 15 kg
NN 3040 K/W33VL124 200 mm 310 mm 82 mm 644 kN 1140 kN 21.6 kg
NN 3040 K/UPW33 200 mm 310 mm 82 mm 644 kN 1140 kN 21.6 kg
NN 3040 K/SPW33VS019 200 mm 310 mm 82 mm 644 kN 1140 kN 21.6 kg
NN 3040 K/SPW33 200 mm 310 mm 82 mm 644 kN 1140 kN 21.6 kg
NN 3040 K/SPC3W33 200 mm 310 mm 82 mm 644 kN 1140 kN 21.6 kg
NNU 4938 BK/SPW33 190 mm 260 mm 69 mm 402 kN 880 kN 11 kg
NNU 4938 B/SPW33 190 mm 260 mm 69 mm 402 kN 880 kN 11 kg
NN 3038 K/SPW33 190 mm 290 mm 75 mm 594 kN 1080 kN 17.1 kg
NN 3038 K/SPC2W33 190 mm 290 mm 75 mm 594 kN 1080 kN 17.1 kg
NNU 4936 BK/SPW33 180 mm 250 mm 69 mm 402 kN 850 kN 10.5 kg
NNU 4936 B/SPW33 180 mm 250 mm 69 mm 402 kN 850 kN 10.5 kg
NN 3036 K/W33VL124 180 mm 280 mm 74 mm 561 kN 1000 kN 16.1 kg
NN 3036 K/SPW33VS019 180 mm 280 mm 74 mm 561 kN 1000 kN 16.1 kg
NN 3036 K/SPW33 180 mm 280 mm 74 mm 561 kN 1000 kN 16.1 kg
NN 3036 K/SPC3W33 180 mm 280 mm 74 mm 561 kN 1000 kN 16.1 kg
NN 3036 K/SPC2W33 180 mm 280 mm 74 mm 561 kN 1000 kN 16.1 kg
NNU 4934 BK/SPW33 170 mm 230 mm 60 mm 336 kN 695 kN 6.95 kg
NNU 4934 B/SPW33 170 mm 230 mm 60 mm 336 kN 695 kN 6.95 kg
NN 3034 K/W33VQ497 170 mm 260 mm 67 mm 457 kN 815 kN 12.3 kg
NN 3034 K/UPW33 170 mm 260 mm 67 mm 457 kN 815 kN 12.3 kg
NN 3034 K/SPW33VS019 170 mm 260 mm 67 mm 457 kN 815 kN 12.3 kg
NN 3034 K/SPW33 170 mm 260 mm 67 mm 457 kN 815 kN 12.3 kg
NNU 4932 BK/SPW33 160 mm 220 mm 60 mm 330 kN 680 kN 6.6 kg
NNU 4932 B/SPW33 160 mm 220 mm 60 mm 330 kN 680 kN 6.6 kg
NN 3032 K/SPW33VS019 160 mm 240 mm 60 mm 369 kN 655 kN 9.05 kg
NN 3032 K/SPW33 160 mm 240 mm 60 mm 369 kN 655 kN 9.05 kg
NN 3032 K/SPC2W33 160 mm 240 mm 60 mm 369 kN 655 kN 9.05 kg
NNU 4930 BK/SPW33 150 mm 210 mm 60 mm 330 kN 655 kN 6.25 kg
NNU 4930 B/SPW33 150 mm 210 mm 60 mm 330 kN 655 kN 6.25 kg
NN 3030 K/W33VQ497 150 mm 225 mm 56 mm 330 kN 570 kN 7.5 kg
NN 3030 K/SPW33VR5212 150 mm 225 mm 56 mm 330 kN 570 kN 7.5 kg
NN 3030 K/SPW33VS019 150 mm 225 mm 56 mm 330 kN 570 kN 7.5 kg
NN 3030 K/SPW33 150 mm 225 mm 56 mm 330 kN 570 kN 7.5 kg
NNU 4928 BK/SPW33 140 mm 190 mm 50 mm 190 kN 400 kN 4.1 kg
NNU 4928 B/SPW33 140 mm 190 mm 50 mm 190 kN 400 kN 4.1 kg
NN 3028 K/SPW33VR592 140 mm 210 mm 53 mm 297 kN 520 kN 6.15 kg
NN 3028 K/SPW33VR5220 140 mm 210 mm 53 mm 297 kN 520 kN 6.15 kg