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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
Brand
System of Measurement
Bearing Type
For Load Direction
Bore Dia
Outer Dia
Width
Distance Pressure Point (a)
Dynamic Radial Load
Static Radial Load
Weight
Price($)
QJ 320 N2MA
TFL
Metric
Ball
Four Point Contact
100 mm
215 mm
47 mm
110 mm
77625 lbf
90000 lbf
9.3 kg
QJ 1021 N2MA/C4
TFL
Metric
Ball
Four Point Contact
105 mm
160 mm
26 mm
93 mm
30375 lbf
38250 lbf
2 kg
QJ 1022 N2MA/C4
TFL
Metric
Ball
Four Point Contact
110 mm
170 mm
28 mm
98 mm
34425 lbf
43425 lbf
2.5 kg
QJ 222 N2MA
TFL
Metric
Ball
Four Point Contact
110 mm
200 mm
38 mm
109 mm
63000 lbf
73125 lbf
5.6 kg
QJ 322 N2MA
TFL
Metric
Ball
Four Point Contact
110 mm
240 mm
50 mm
123 mm
87750 lbf
108000 lbf
12.5 kg
QJ 224 N2MA
TFL
Metric
Ball
Four Point Contact
120 mm
215 mm
40 mm
117 mm
67500 lbf
82125 lbf
6.95 kg
QJ 324 N2MA
TFL
Metric
Ball
Four Point Contact
120 mm
260 mm
55 mm
133 mm
93375 lbf
119250 lbf
16 kg
QJ 226 N2MA
TFL
Metric
Ball
Four Point Contact
130 mm
230 mm
40 mm
126 mm
69750 lbf
90000 lbf
7.75 kg
QJ 326 N2MA
TFL
Metric
Ball
Four Point Contact
130 mm
280 mm
58 mm
144 mm
102375 lbf
137250 lbf
19.5 kg
QJ 228 N2MA
TFL
Metric
Ball
Four Point Contact
140 mm
250 mm
42 mm
137 mm
77625 lbf
106875 lbf
9.85 kg
QJ 328 N2MA
TFL
Metric
Ball
Four Point Contact
140 mm
300 mm
62 mm
154 mm
112500 lbf
156375 lbf
24 kg
QJ 1030 N2MA
TFL
Metric
Ball
Four Point Contact
150 mm
225 mm
35 mm
131 mm
54450 lbf
75375 lbf
5.25 kg
QJ 230 N2MA
TFL
Metric
Ball
Four Point Contact
150 mm
270 mm
45 mm
147 mm
90000 lbf
128250 lbf
12.5 kg
QJ 330 N2MA
TFL
Metric
Ball
Four Point Contact
150 mm
320 mm
65 mm
165 mm
119250 lbf
172125 lbf
29 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.
What payment methods do you offer?
We support multiple payment methods, including Letter of Credit (L/C), bank transfer (T/T), and PayPal, providing convenient options for customers worldwide.
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