High Precision Angular Contact NTN Ball Bearing QJ311 Series With
Less Coefficient Friction
Detailed Product Description
Angular contact ball bearing can withstand radial load and axial
load simultaneously, as well as the pure axle loads. They have
higher limit speed. High precision and high speed bearings usually
take 15 degrees contact Angle. The contact angle decide the
capacity of axial load. Retainers are made of brass, synthetic
resins or others subject to individual bearing features and
application conditions.
Single-row angular contact ball bearings can accommodate axial load
in one direction, if enduring radial load, it will raise additional
axial force. And only limited axial displacement of the shaft or
housing in one direction. The contact angle of angular contact ball
bearings is 40, so you can afford a large axial load. Design of
angular contact ball bearing is non-separable, shoulder height on
both sides of the inners and outer rings are different. In order to
increase the bearing load capacity, lower one side of the shoulder,
so that the bearing can be mounted into more balls.
Pairs of angular contact ball bearings can accommodate radial loads
as the principal combined radial and axial bi-directional load or
under purely radial load. Tandem configuration can only take a
single direction axial load, other configurations can be subjected
to either direction of axial loads. This type of bearings are
generally submitted by manufacturers combine matching users,
pre-loading interference after installation, rings and balls of
steel in the axial pre-load state, thus improving the supporting
stiffness and running accuracy of bearing the whole group as a
single.
Features of angular contact ball bearing:
(1) Angular contact ball bearings are particularly suitable for
carrying combined (axial and radial) loads. Sometimes, they also
can carry pure axial load and operate in higher speed. Under radial
load, axial component force will be produced which must be
counteracted. So the bearings are normally adjust against a second
bearing.
(2) Single row angular contact ball bearings can carry axial load
acting in one direction only. In many applications, angular contact
ball bearings in pairs or muti-arrangement should be used. The
axial load carrying capacity of angular contact ball bearings
increase with the increase of contact angle.
(3) Angular contact ball bearings have raceways in the inner and
outer rings that are displaced with respect to each other in the
direction of the bearing axis. This means that they are designed to
accommodate combined loads, i.e.simultaneously acting radial and
axial loads.
The size includes
(0)2 series and (0)3 series
Product Show:
some of them are listed below
Boundary dimensions(mm) | Basic load ratings(kN) | Limiting speeds(rpm) | Mass(Kg) | Bearing Number |
d | D | B | Cr | Cor | Grease | Oil | (Approx.) | HDBB | NTN |
40 | 80 | 18 | 40.5 | 37 | 6700 | 9000 | 0.391 | QJ 208 | QJ208 |
65 | 120 | 23 | 90 | 83 | 4300 | 5600 | 1.2 | QJ 213 | QJ213 |
120 | 215 | 40 | 280 | 275 | 2200 | 3200 | 6.49 | QJ 224 | QJ224 |
30 | 72 | 19 | 44.5 | 31.2 | 6700 | 9000 | 0.42 | QJ 306 | QJ306 |
55 | 120 | 29 | 115 | 86.5 | 4000 | 5300 | 1.48 | QJ 311 | QJ311 |
110 | 240 | 50 | 328 | 345 | 2000 | 3000 | 12.4 | QJ 322 | QJ322 |
Competitive Advantage
1. Quality level: reach the same level as the Japanese and European
bearings
2. Less coefficient of friction
3. High limiting speed
4. Large size range
5. variations of structure
