NFR Roller Clutch Bearing​​ Sprag Type One Way Clutch

Production introduction

Single row cylindrical roller bearings are separable bearings, which are easy to install and disassemble, both rings can be tightly fitted, and the modified contact line between the rollers and raceways can reduce stress concentration.

basic type
The types of cylindrical roller bearings are divided according to their rib form.
The NU type bearing has two ribs on the outer ring and no ribs on the inner ring. The inner ring of the N-type bearing has two ribs, and the outer ring has no ribs.
NU and N cylindrical roller bearings are used for the floating end. They are separable bearings for easy mounting and dismounting, and both inner and outer rings can be tightly fitted.
NJ type cylindrical roller bearing has two ribs on the outer ring and a single rib on the inner ring, which can bear axial force in one direction.
NUP-type cylindrical roller bearings are used for fixed ends and can withstand axial forces in both directions. The outer ring of this type of bearing has two ribs, and the inner ring has a fixed rib and a movable rib. An NJ type cylindrical roller bearing and an angle ring HJ form a fixed end bearing similar to the NUP type. The enhanced type of cylindrical roller bearing can withstand large loads, and its basic design is 2E, 22E, 23E series. Their rollers are designed to withstand maximum loads.

Bearing clearance
The basic type of radial clearance of single row cylindrical roller bearings is ordinary grade. Bearings with C3 suffix (radial clearance greater than normal group clearance) or bearings with C4 suffix (radial clearance greater than C3 group) are available upon request. center
Corrected roller and raceway contact lines in cylindrical roller bearings reduce stress concentrations. This allows for some deflection. The permissible deflection angle of single row cylindrical roller bearings is up to 4°.

Cylindrical roller bearing
The rolling elements are radial rolling bearings with cylindrical rollers. Cylindrical roller bearings Cylindrical rollers and raceways are linear contact bearings. Load capacity, mainly bear radial load. The friction between the rolling element and the rib of the ring is small, which is suitable for high-speed rotation. According to whether the ring has ribs or not, it can be divided into single row bearings such as NU, NJ, NUP, N, NF, and double row bearings such as NNU and NN. The bearing is a structure in which the inner ring and the outer ring can be separated. Cylindrical roller bearings without ribs on the inner or outer ring, the inner and outer rings can move relative to the axial direction, so they can be used as free end bearings. Cylindrical roller bearings with double ribs on one side of the inner ring and outer ring and a single rib on the other side of the ring can withstand a certain degree of axial load in one direction. Generally, a steel stamping cage or a copper alloy turning cage is used. However, there are also part of the use of polyamide forming cage.

Cylindrical roller bearing features:
1. The roller and the raceway are in line contact or trimmed line contact, and the radial bearing capacity is large, which is suitable for bearing heavy loads and impact loads.
2. The friction coefficient is small, suitable for high speed, and the limit speed is close to that of deep groove ball bearings.
3. N type and NU type can move axially, can adapt to the change of relative position between shaft and shell caused by thermal expansion or installation error, and can be used as free end support.
4. The processing requirements for the shaft or seat hole are high. After the bearing is installed, the relative deflection of the outer ring axis should be strictly controlled to avoid contact stress concentration.
5. The inner ring or outer ring can be separated for easy installation and removal.

Main uses: Large and medium-sized electric motors, locomotives, machine tool spindles, internal combustion engines, generators, gas turbines, reduction boxes, rolling mills, vibrating screens, and hoisting and transporting machinery.
Cylindrical roller bearings (short cylindrical single row roller bearings) features: Cylindrical roller bearings are usually only subjected to radial force. Compared with ball bearings of the same size, the radial bearing capacity is increased by 1.5-3 times, with good rigidity, impact resistance, Short cylindrical single row roller bearings Cylindrical roller bearings are especially suitable for rigid supports, but also support short shafts, shafts that cause axial displacement due to thermal elongation, and machine accessories that require separate bearings for installation and disassembly. Cylindrical roller bearings are mainly used for Large motors, machine tool spindles, engine front and rear support shafts, train and passenger car box shaft supports, diesel engine crankshafts, automobile tractor gearboxes, etc.