EM Cylindrical roller bearings

Cylindrical roller bearings

Cylindrical roller and raceway are line contact bearings. Large load capacity, mainly bear radial load. Rolling body and ring edge friction is small, suitable for high-speed rotation. According to the ring with or without edge, can be divided into NU, NJ, NUP, N, NF and other single row cylindrical roller bearings, and NNU, NN and other double row cylindrical roller bearings. The bearings are of separable structure with inner ring and outer ring.

Cylindrical roller bearings with inner or outer rings without retaining edges can be used as free-end bearings because the inner and outer rings can be moved relative to each other in the axial direction. Cylindrical roller bearings with double retaining edges on one side of the inner and outer rings and a single retaining edge on the other side of the collar can withstand a certain degree of axial load in one direction. Generally use steel plate stamping cage, or copper alloy turning solid cage. However, there is also a part of the use of polyamide forming cage.

Cylindrical roller bearings roller and raceway is line contact, radial load capacity. Both suitable for bearing heavy loads and impact loads, also suitable for high speed rotation, at the same time improve the roller end face and retaining edge contact area lubrication conditions, improve the use of bearing performance. Bearing people microblogging is very worthy of attention! Generally applicable to large and medium-sized electric motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, reduction gearboxes, rolling mills, vibrating screens, and lifting and transport machinery.

1. Roller and raceway are in line contact or repair under line contact, radial bearing capacity is large, suitable for bearing heavy loads and shock loads.

2. small friction coefficient, suitable for high speed, limit speed close to deep groove ball bearings.

3. N-type and NU-type can be moved axially, can adapt to changes in the relative position of the shaft and the shell caused by thermal expansion or installation errors, and can be used as a free end support.

4. the processing requirements of the shaft or seat hole is high, bearing installation of the outer ring axis of the relative skew should be strictly controlled, so as not to cause contact stress concentration.

5. inner or outer ring can be separated, easy to install and dismantle.

Cylindrical roller and raceway is line contact, radial load capacity. Both for bearing heavy load and shock load, also suitable for high speed rotation.

Cylindrical roller bearing raceways and rolling elements are geometrically shaped. After improving the design, it has high load carrying capacity, the new structural design of the retaining edge and roller end face not only improves the axial bearing capacity, but also improves the lubrication conditions in the contact area between the roller end face and the retaining edge, which improves the performance of the bearings.

Cylindrical roller bearings can be divided into PO,P6,P5,P4,P2 according to the precision grade, and the precision grade is sorted from low to high.

1, outer ring without edge N0000 type and inner ring without edge NU0000 type cylindrical roller bearings such bearings can accept larger radial load, high limit speed, do not bind the axial displacement of the shaft or shell, can not accept the axial load.

2, inner and outer ring are with edge cylindrical roller bearings NJ0000 type, NF0000 type bearings can bind the shaft or shell of a direction of axial displacement, and can accept a small unidirectional axial load. nu0000+hj0000 type, nj0000+hj0000 type, nup0000 type bearings, can be imported in the field of axial clearance bearings bind the shaft or shell of the two directions of axial displacement. of axial displacement. And can accept smaller bi-directional axial load.