The characteristics of roller bearings and ball bearings and difference

Roller bearings and ball bearings are rolling bearings. All simple terms, a rolling body is a steel column. Another is the ball rolling, that is, the so-called ball.

Said first roller bearing:

Rolling bearing is a kind of cylindrical roller bearings to the heart. Cylindrical roller in line contact with the roller bearings. Load capacity, mainly bear radial load. Rolling ring wall with small friction, suitable for high-speed rotation. Whether under the ring wall, divided NU, NJ, NUP, N, NF and other single row bearings, and NNU, NN double-row bearings. The bearing is the inner, outer separable structure. No inner or outer wall of the cylindrical roller bearings, the inner and outer rings can be relative to the axial movement, so it can be used as the free end of the bearing. In the inner and outer rings on one side of a double wall, the other side of the ring has a single wall of the cylindrical roller bearings, can withstand a certain degree of axial load in one direction. General use of steel stamping cage, or copper alloy machined cage. But there are also part of the use of polyamide forming cage.

1: roller and raceway contact or repair off the assembly line for the line contact, the radial load capacity, for those who bear the heavy load and shock load.

2: The friction coefficient is small, for those high-speed, speed close to the deep groove ball bearings.

3: N type and NU type can move axially, to accommodate those errors due to thermal expansion or installation of the shaft and housing caused by changes in relative position can be used for supporting the free end.

4: Block the shaft or demanding hole machining, the bearing outer ring axis relative deflection after installation should be strictly controlled to avoid contact stress concentration and so on.

5: inner or outer detachable, easy installation and removal of bearings.

Main purposes are: large and medium motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, gear boxes, rolling mill, vibrating screen, and handling equipment and so on.

Besides ball bearings:

This kind of bearing is a rolling, ball equipment, including steel ring and the outer steel ring in the middle, can withstand greater loads. Also known as ball bearings.

Ball bearing mainly contains the following four basic components: the ball , the inner ring , outer  and Cage . Ball bearings for general industrial use to meet the standards AISI52100, ball and ring usually made of high chromium steel, Rockwell hardness between about 61-65. The retainer ring hardness compared with the low ball, the material of metal or nonmetallic . Rolling than the journal bearing rotational friction is small, this is due to the friction generated by relatively low temperatures, when the same speed in time.

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