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Four-Point Contact Angular Contact Ball Bearings (General)
Four-point contact angular contact ball bearings are designed to handle both radial and axial loads in all directions. These bearings are commonly used in crane systems, wind turbines, and heavy machinery.
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Total 127 Results
Part Number
Interchangeable
Bore Dia
Outer Dia
Width
Chamfer Dimension
Distance Pressure Point (a)
Dynamic Radial Load
Static Radial Load
Max Speed
Weight
QJ 1072 N2MA
SKF
360 mm
540 mm
82 mm
5 mm
315 mm
191700 lbf
434250 lbf
1700 rpm
70.5 kg
QJ 1272 N2MA
SKF
360 mm
650 mm
122 mm
6 mm
505 mm
249750 lbf
585000 lbf
1500 rpm
190 kg
QJ 1076 N2MA
SKF
380 mm
560 mm
82 mm
5 mm
329 mm
198900 lbf
459000 lbf
1600 rpm
72.5 kg
QJ 1276 N2MA
SKF
380 mm
680 mm
132 mm
6 mm
530 mm
263250 lbf
641250 lbf
1400 rpm
220 kg
QJ 1080 N2MA
SKF
400 mm
600 mm
90 mm
5 mm
350 mm
203400 lbf
486000 lbf
1500 rpm
95 kg
QJ 1280 N2MA
SKF
400 mm
720 mm
140 mm
6 mm
560 mm
292500 lbf
731250 lbf
1300 rpm
265 kg
QJ 1084 N2MA
SKF
420 mm
620 mm
90 mm
5 mm
364 mm
207675 lbf
513000 lbf
1500 rpm
99.5 kg
QJ 1284 N2MA
SKF
420 mm
760 mm
150 mm
7.5 mm
590 mm
321750 lbf
843750 lbf
1300 rpm
315 kg
QJ 1088 N2MA
SKF
440 mm
650 mm
94 mm
6 mm
382 mm
223875 lbf
562500 lbf
1400 rpm
114 kg
QJ 1288 N2MA
SKF
440 mm
790 mm
155 mm
7.5 mm
615 mm
315000 lbf
843750 lbf
1200 rpm
350 kg
QJ 1988 N2MA
SKF
440 mm
600 mm
74 mm
4 mm
364 mm
171225 lbf
427500 lbf
1500 rpm
64 kg
QJ 1092 N2MA
SKF
460 mm
680 mm
100 mm
6 mm
399 mm
234000 lbf
596250 lbf
1300 rpm
130 kg
QJ 1292 N2MA
SKF
460 mm
830 mm
165 mm
7.5 mm
645 mm
344250 lbf
956250 lbf
1100 rpm
415 kg
QJ 1096 N2MA
SKF
480 mm
700 mm
100 mm
6 mm
413 mm
238500 lbf
630000 lbf
1300 rpm
135 kg
Handles Bi-Directional Axial & Radial Loads
The unique feature of Four-Point Contact Angular Contact Ball Bearings is their ability to accommodate significant axial loads in both directions, plus radial loads, using only a single row of balls. This is achieved through specially shaped raceways (Gothic arch).
If your application has complex, reversing axial loads combined with radial forces, this 4 point contact bearing offers a highly efficient solution within one component.
Significant Axial Space Saving
Compared to using two single row angular contact bearings arranged back-to-back or face-to-face, a Four-Point Contact Angular Contact Ball Bearing takes up considerably less axial space. This compactness is a major advantage in designs where length along the shaft is restricted, such as in gearboxes or slewing rings.
Choose this bearing type when minimizing axial footprint is critical for your product.
Simplified Application Design
By handling complex load combinations within one unit, the 4 point contact bearing can simplify the overall machine design. It potentially reduces the number of components needed, simplifies shaft and housing machining, and can streamline the assembly process.
This simplification can lead to cost savings in both manufacturing and assembly, making it an attractive option for efficient engineering solutions requiring robust load support.
FREQUENTLY ASKED QUESTIONS
What is the primary function of the Gothic arch raceway?
The Gothic arch shape creates two contact points on each ring under axial load, effectively allowing a single row of balls to handle thrust loads in either direction. This is the core mechanism behind the 4 point contact bearing's bidirectional capability.
Is the radial load capacity limited compared to axial in four-point contact angular contact ball bearings?
Yes, generally. While they handle radial loads, the design primarily optimizes for high axial load capacity. For applications with predominantly radial loads, other types of bearings like deep groove ball bearings might be more suitable.
What's crucial during installation if the bearing has a split ring?
The two halves of the split ring must be kept together, correctly oriented, and securely clamped axially on the shaft (usually by a locknut). Improper clamping can lead to incorrect clearance and premature failure. It doesn't typically allow for direct bearing installation onto shouldered shafts without accessing the ring halves.
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