Cross roller bearings
Continuous groove type 1.1 structure of deep groove ball bearings on each ring has a cross-section of approximately spherical perimeter 1/3 raceway. It is mainly used to bear
radial load, also can withstand the axial load.
1.2 in the bearing radial clearance increases, with the nature of angular contact ball bearing, the axial load bearing two directions alternating.
1.3 small friction, high speed.
1.4 has the advantages of simple structure, low manufacturing cost, easy to manufacture high precision.
1.5 general methods of stamping cage diameter greater than 200mm, the bearing or high-speed operation, the use of the car business entity retainer. Variant structure of deep
needle roller bearingsas many as 60.
2, angular contact ball bearing
Can bear radial load and axial load, high speed, the larger the contact angle, the higher the axial bearing capacity. Single row bearings can only bear the axial load in one
direction, in radial load, will cause additional axial force. The axial displacement of the bearing can limit shaft or shell in one direction. If quality.the installation, the
outer ring of a bearing on the relative, the wide end of the wide face, narrow end face with narrow end. So to avoid the additional axial force, but also in the two direction of
the shaft or shell limit in the axial clearance range. Structural change of angular contact ball bearing as many as 70.
The 2.1 contact angle is 15 °, 25 °. 40 degrees three, the larger the contact angle of the axial bearing capacity is higher. High precision and high speed bearings usually
take 15 degrees contact angle, under the action of axial force, contact angle increases. The 2.2 is the inner or outer lock, inner, outer ring can not be separated. The outer
ring and the inner ring heating after expansion, the rolling body, the holder assembly. Ball number ratio of deep groove ball bearing. Rated load in ball bearings in the
largest, strong rigidity, smooth operation.
2.3 can use inner, outer mutual displacement adjustment radial clearance. Often used in pairs, and applying a pre load, in order to improve the bearing stiffness.
3, cylindrical roller bearings
3.1 roller and raceway for the line of contact, radial load capacity, suitable for heavy load and shock load.
3.2 the friction coefficient is small, suitable for high-speed, the speed limit is close to the deep groove ball bearing.
3.3 N type and NU type axial moving, can adapt to the changes due to thermal expansion and installation error of the shaft and the casing relative position, can be used as a
free end bearing.
Use. The inner or outer ring can be separated, which is convenient for installation and disassembly. 3.4 the processing requirements of shaft and hole high, bearing inner and
outer ring axis relative deviation after installation must strictly control, so as to avoid the contact stress concentration. Hole with 1:12 taper double row cylindrical roller
bearings 3.5, radial clearance can be adjusted, radial rigidity is high, suitable for machine tool spindles.
The 3.6 cross roller bearings, cylindrical roller in a V shaped groove 90 degree roll surface through the isolated blocks are arranged vertically, so the cross roller bearings
can bear radial load, axial load and torque load and multi direction load. The inner ring and the outer ring size is miniaturized, thin form is small size is close to the limit,
and has the advantages of high rigidity, and the precision can reach P5 P4, P2. The rotary table is therefore suitable for industrial robot joint part and a rotating part,
machining centers, precision equipment rotary table, medical equipment, calculators, military industry, IC manufacturing equipment etc..
4, the tapered roller bearing
Separation type bearings, bearings, have tapered raceway, roller is truncated. Roller and raceway for the line of contact, can bear radial and axial loads heavier, can also be
subject to pure axial load. The larger the contact angle, the higher the axial bearing capacity. Contact line design of tapered roller should make the roller and the inner and
the outer raceway extended to the bearing axis at the same point, in order to realize pure rolling. Tapered roller bearing the new design with the reinforced structure, roller
diameter increases, the roller length, roller number increase, the convex roller, so that the bearing capacity and the fatigue life of bearing significantly improve. Spherical
and conical surface contact between the roller large end face and large rib, improve the lubrication.
This kind of bearing according to the number of columns of the roller can be divided into single row, double row and four row tapered roller bearings of different structure
types. This type of bearing is also used Inch series products
5, thrust ball bearing is separable bearing, the contact angle of 90 °, can be installed separately, only can withstand the axial load. Low speed limit. Steel ball and
centrifugal force pushed the raceway outer, easy bruising, but not suitable for high speed operation. A one-way bearing can bear axial load, two-way two-way bearings can
withstand axial load. Thrust ball bearing with spherical seat with adjustable mind
Can, can eliminate the influence of the installation error.
6, thrust cylindrical roller bearings are separable bearing. Can bear axial load, radial displacement of the shaft can limit. Bearing rigidity, small occupied space, the axial
load capacity, low sensitivity to shock load. Suitable for low speed, the workplace is commonly used in the thrust ball bearings are not applicable. The installation does not
allow the axis of the shaft and housing tilt.
7, spherical roller thrust bearing
Separation type bearings, the load line and the bearing axis to form a certain angle, axial load capacity, under axial load and can bear radial load certain. This type of
bearings, spherical roller tilt alignment, raceway is spherical, with self-aligning properties, therefore allowing a plurality of inclined shaft. Can be used in heavy load
situation, allowing high speed. The use of lubricating oil.
8, self-aligning ball bearing
The 8.1 outer raceway is spherical, with self-aligning properties. Because the processing installation and shaft bending causes for the bearing seat hole is not concentric with.
Adjust the skew angle is within 3 degrees.
Small angle 8.2 bearing contact, almost invariant under the action of axial force, the axial bearing capacity is small. Mainly bear radial load, the radial load at the same
time, can also be
A small amount of axial load, limit the speed ratio of deep groove ball bearing low.
9, four point contact ball bearing
Detachable type structure can bear radial load, two-way axial load, axial displacement can be limited in two directions, angular contact ball bearing axial space but more than
double the size of the angular contact ball bearing occupies little single bearing can replace the front or back of the combination of portfolio. Because of double half inner
(or outer ring), ball number, with larger bearing capacity. Four point contact ball bearing axial, radial loads applied to bear pure axial load or axial load in. Compared with
the bearing and the other ball bearings, when
The radial clearance and axial clearance, smaller, higher limit speed. In normal working condition, the axial load bearing any direction, can form a contact angle, ball and
inner, outer raceway each contact point, to avoid the occurrence of sliding friction contact zone. Therefore, the bearing should not be subjected to radial force and load.
10, spherical roller bearing
The outer ring raceway is a part of the spherical bearing, with internal self-aligning performance, adaptation to relative deflection of shaft and housing bore. Can bear radial
load and shock load, but also can bear bidirectional certain axial load. The axial displacement of the bearing can limit shaft or shell in bearing axial clearance range. This
kind of bearing structure principle and characteristics and self-aligning ball bearing the same load, the capacity and the speed limit's permission, can be interchanged. Tapered
bore bearing by using fasteners or unloading easy axis of the folding.
11, thrust tapered roller bearing
Separation type bearings. A design of the shaft ring and ring raceway and roller rolling surface of the conical surface vertex to the center line. A one-way bearing can bear
axial load, two-way two-way bearings can withstand axial load.
12, the needle thrust roller bearing
The roller length (L) and roller diameter (Dw) than L/Dw > 2.5 and roller diameter (Dw) < roller bearing 6mm is referred to as the needle roller bearing.
12.1 needle bearing radial size is small, but the radial load carrying capacity is very high, can not bear the axial load, use only as a free end bearing. Lightweight,
miniaturization is beneficial to device.
Needle roller bearings without inner ring 12.2 with or without outer ring, only keep the needle assembly frame, the machining accuracy requirements, the match of the journal and
bearing seat hole surface hardness should be the same with the bearing ring rolling.
The coefficient of friction of 12.3 needle bearing large, not suitable for high speed.
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