ZHEJIANG TOP BEARINGS CO., LTD.
YOUR TOP PARTERNER FOR PLAIN BEARINGS and ROLLING BEARINGS.
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Spherical Plain Bearing is a bearing that permits angular rotation about a central point in two orthogonal directions (usually within a specified angular limit based on the bearing geometry). Typically these bearings support a rotating shaft in the [bore] of the inner ring that must move not only rotationally, but also at an angle.
Spherical bearings are used in countless applications, wherever rotational motion must be allowed to change the alignment of its rotation axis. A good example is the drive axle bearings of a vehicle control arm (or A-arm) suspension. The mechanics of the suspension allow the axle to move up and down (and the wheel to turn in order to steer the vehicle), and the axle bearings must allow the rotational axis of the axle to change without binding. While in practice, spherical bearings are not used here, it is a simple concept that illustrates a possible application of a spherical bearing. In fact, spherical bearings are used in smaller sub-components of this type of suspension, for example certain types of constant-velocity joints.
Spherical bearings are used in car suspensions, engines, drive shafts, heavy machinery, sewing machines, robotics and many other applications.
| Tolerances for radial spherical plain bearings(except for series PB..., GEBJ…S) |
| Inner ring | |||||||||||||
| d mm | △dmp | △dmp*(GE...LO) | vdp | vdmp | Vdp* (GE...LO) | Vdmp* (GE...LO) | △Bs | △Bs* | |||||
| over | incl. | max | min | max | min | max | max | max | max | max | min | max | min |
| - | 18 | 0 | -8 | 18 | 0 | 8 | 6 | 18 | 14 | 0 | -120 | 0 | -180 |
| 18 | 30 | 0 | -10 | 21 | 0 | 10 | 8 | 21 | 16 | 0 | -120 | 0 | -210 |
| 30 | 50 | 0 | -12 | 25 | 0 | 12 | 9 | 25 | 19 | 0 | -120 | 0 | -250 |
| 520 | 80 | 0 | -15 | 30 | 0 | 15 | 11 | 30 | 22 | 0 | -150 | 0 | -300 |
| 80 | 120 | 0 | -20 | 35 | 0 | 20 | 15 | 35 | 26 | 0 | -200 | 0 | -350 |
| 120 | 180 | 0 | -25 | 40 | 0 | 25 | 19 | 40 | 30 | 0 | -250 | 0 | -400 |
| 180 | 250 | 0 | -30 | 46 | 0 | 30 | 23 | 46 | 35 | 0 | -300 | 0 | -460 |
| 250 | 315 | 0 | -35 | 52 | 0 | 35 | 26 | 52 | 39 | 0 | -350 | 0 | -520 |
| 315 | 400 | 0 | -40 | 57 | 0 | 40 | 30 | 57 | 43 | 0 | -400 | 0 | -570 |
| 400 | 500 | 0 | -45 | - | - | 45 | 34 | - | - | 0 | -450 | - | - |
| 500 | 630 | 0 | -50 | - | - | 50 | 38 | - | - | 0 | -500 | - | - |
| The deviations in the columns with symbol*apply to spherical plain bearings of series GE…LO. | |||||||||||||
| Outer ring |
| D mm | △Dmp um | Vdp um | Vdmp um | △Cs um | |||
| over | incl. | max | min | max | max | max | min |
| - | 18 | 0 | -8 | 10 | 6 | 0 | -240 |
| 18 | 30 | 0 | -9 | 12 | 7 | 0 | -240 |
| 30 | 50 | 0 | -11 | 15 | 8 | 0 | -240 |
| 50 | 80 | 0 | -13 | 17 | 10 | 0 | -300 |
| 80 | 120 | 0 | -15 | 20 | 11 | 0 | -400 |
| 120 | 150 | 0 | -18 | 24 | 14 | 0 | -500 |
| 150 | 180 | 0 | -25 | 33 | 19 | 0 | -500 |
| 180 | 250 | 0 | -30 | 40 | 23 | 0 | -600 |
| 250 | 315 | 0 | -35 | 47 | 26 | 0 | -700 |
| 315 | 400 | 0 | -47 | 53 | 30 | 0 | -800 |
| 400 | 500 | 0 | -45 | 60 | 34 | 0 | -900 |
| 500 | 630 | 0 | -50 | 67 | 38 | 0 | -1000 |
| 630 | 800 | 0 | -75 | 100 | 56 | 0 | -1100 |
| 800 | 1000 | 0 | -100 | 135 | 75 | 0 | -1200 |
| 2>. Tolerances for series PB… | |||||||||||||
| Inner ring |
| d mm | △dmp um | △Bs um | |||
| over | incl. | max | min | max | min |
| - | 6 | 12 | 0 | 0 | -100 |
| 6 | 10 | 15 | 0 | 0 | -100 |
| 10 | 18 | 18 | 0 | 0 | -100 |
| 18 | 30 | 21 | 0 | 0 | -100 |
| Outer ring |
| D mm | △Dmp um | △Cs um | |||
| over | incl. | max | over | incl. | max |
| 10 | 18 | 0 | -11 | 100 | -100 |
| 18 | 30 | 0 | -13 | 100 | -100 |
| 30 | 50 | 0 | -16 | 100 | -100 |
| 50 | 80 | 0 | -19 | 100 | -100 |
| 3>. Tolerances for series GEBJ...S, | |||||||||||||
| Inner ring |
| d mm | △dmp um | △Bs um | |||
| over | incl. | max | min | max | min |
| - | 6 | 12 | 0 | 0 | -100 |
| 6 | 10 | 15 | 0 | 0 | -100 |
| 10 | 18 | 18 | 0 | 0 | -100 |
| 18 | 30 | 21 | 0 | 0 | -100 |
| Outer ring |
| D mm | △Dmp um | △Cs um | |||
| over | incl. | max | over | incl. | max |
| 10 | 18 | 0 | -11 | 0 | -240 |
| 18 | 30 | 0 | -13 | 0 | -240 |
| 30 | 50 | 0 | -16 | 0 | -240 |
| 50 | 80 | 0 | -19 | 0 | -300 |
| The symbols of dimension and tolerance | |||||||||||||
| d: Bearing bore diameter, nominal. | |||||||||||||
| △dmp: Single plane mean bore diameter deviation. | |||||||||||||
| Vdp: Bore diameter variation in a single radial plane. | |||||||||||||
| Vdmp: mean bore diameter variation. | |||||||||||||
| △Bs: Deviation of a single width of the inner ring. | |||||||||||||
| B: Width of inner ring, nominal. | |||||||||||||
| D: Bearing outside diameter, nominal. | |||||||||||||
| △Dmp: Single plane mean outside diameter deviation. | |||||||||||||
| VDp: Outside diameter variation in a single radial plane. | |||||||||||||
| VDmp: Mean outside diameter variation. | |||||||||||||
| △Cs: Deviation of a single width of the outer ring. | |||||||||||||
| C: Width of ourer ring, nominal. | |||||||||||||
| △Ts: Actual deviation of width of the angular contact spherical plain bearing. | |||||||||||||
| △Hs: Actual deviation of height of the spherical plain thrust bearing. | |||||||||||||
| hs,△h1s: Center height deviation of rodends or ball joint rod ends. |
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